VI. AGBOSTEDEAE
35. AGROSTIS L
Annuals or usually perennials with small spikelets in open panicles; spikeletB 1-flowered; rachilla jointed above the glumes, not produced beyond the floret; glumes equal or nearly so, acute, longer than the floret; lemma rather broad, less firm than the glumes, usually obtuse, awnlees or with a slender dorsal awn; palea hyaline, much shorter than the lemma or wanting; stamens 3; grain inclosed in the lemma but free.
KEY TO THE SPECIES.
Panicles dense or very narrow.
Culms decumbent at the base, with long creeping stolons rooting
at the nodes; panicles short and thick 1. A. stolonifera.
Culms erect, without stolons; panicles long and narrow 2. A. exarata.
Panicles loose and spreading.
Branches of the panicle 7 to 10 cm. long 3. A. htemalis.
Branches of the panicle 4 to 6 cm. long.
Palea minute and inconspicuous 4. A. idahoetma.
Palea half as long as the lemma
Lemma usually not awned; branches of the panicle
ascending 5. A. alba.
Lemma with an awn of about the same length; branches
of the panicle spreading or reflexed 6. A. rosei.
1. AgrostiB stolonifera L. Sp. PI. 62. 1753. Water bentgrass.
Agrostis verticillata Vill. Prosp. PL Dauph. 16.1779.
Type locality: " Habitat in Europa."
Range: California and Texas to Mexico; also in South America, Europe, and Asia.
New Mexico: Carrizo Mountains; Farmington; Sandia Mountains; Santa Fe; Las
WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 79
Vegas Hot Springs; Burro Mountains; Socorro; Fort Bayard; Berendo Creek; Rincon;
Cloverdale; Meailla Valley; Organ Mountains; Malonea Ranch; Roswell. Wet ground and borders of streams, in the Upper Sonoran and Transition zones.
2.. Agrostis exarataTrin. Gram. Unifl. 207. 1824.
Type locality: "Unalaechka."
Range; Alaska and British America to Mexico; also in Siberia.
New Mexico: Tunitcha Mountains; Ram ah; Winsor Creek; Pecoa; Rio Pueblo;
Las Vegas; Cross L Ranch; Fort Bayard; Rio Mimbres; Chiz; Lower Plaza; Deming;
Santa Fe; Burro Mountains; Oi^an Mountains; Gilmores Ranch. Wet ground, in the Transition Zone.
3. Agrostis hie mails (Walt.) B. S. P. Prel. Cat. N. Y. 68.1888. Haib grass.
Cornucopia# hwmalis Walt. Fl. Carol 73. 1788, Agrostis scabra Willd. Sp. PI, 1:370.1799.
Type locality: Carolina.
Range: Throughout most of North America.
New Mexico: Tunitcha Mountains; Santa Fe and Las Vegas mountains; Sandia Mountains; Grants Station; Inscription Rock; Mogollon Mountains; Mimbres River;
White and Sacramento mountains. Meadows and woods, in the Transition and Canadian zones.
4. Agrostis idahoenais Nash, Bull. Torrey Club 24:42.1897.
Agrostis tenuis Vaeey, Bull. Torrey Club 10: 21.1883, not Sibth. 1794.
Type locality: Forest, Nez Perces County, Idaho.
Range: Washington and Montana to California and New Mexico.
New Mexico: El Rito Creek (Wooton 2989). Damp woods, in the Transition Zone.
5. Agrostis alba L. Sp. PI. 63.1753. Redtop.
Type locality: "Habitat in Europae ncmoribus."
Range: British America, southward to Mexico.
New Mexico: El Rito Creek; Santa Fe; Albuquerque; Zuni Reservation; Indian Creek; Farmington; Cedar Hill; Fort Bayard; Animas Creek; White Mountains. Wet meadows, in the Upper Sonoran and Transition zones.
6. Agrostis rosei Scribn. & Merr. U. S. Dept. Agr. Div. Agroet. Bull. 24: 21.1901.
Type locality: Sierra Madre, Zacatecas, Mexico.
Range: Southwestern New Mexico to central Mexico.
New Mexico: Cloverdale (Mearns 462).
Tall perennials with small spikelets in many-flowered terminal panicles; spikelets 1-flowered; rachilla produced above the floret into a short, usually hairy pedicel or bristle; glumes nearly equal, awnless, usually exceeding the lemma; lemma sur- rounded at the base by numerous hairs, these sometimes equaling or exceeding it in length, awned on the back usually from below the middle; palea more than half
the length of the lemma, faintly 2-nerved; stamens 3; styles distinct; grain inclosed by the lemma and palea and more or less adherent.
36. CALAMAGROSTIS A dans. Reed bentgrass.
key to the species.
Panicles open, the lower branches spreading or drooping; spikelets greenish Panicles dense, the branches erect or ascending; spikelets strongly
tinged with purple
1. C. canadensis.
2. C, hyperborea americana,
80 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM
1. Calamagrostis canadensis (Michx.) Beau v. Ess. Agrost. 15. 1812.
Arvmdo canadensis Michx. Fl. Bor. Amer. 1:73.1803.
Type locality: Canada.
Range: British America to Oregon, New Mexico, Ohio, and New Jersey.
New Mexico: Ponchuelo Creek; Winsor Creek. Wet ground, in the Transition and Canadian zones.
J 2. Calamagrostie hyperborea americana Vaaey; Kearney, U. S. Dept. Agr. Div, Agrost. Bull. 11: 41.1898.
Deyeima neglecta americana Vaaey; Macoun, Cat. Can. PI. 4: 206. 1888.
Type locality: Donald, Columbia Valley, British Columbia.
Range: British America to Oregon, New Mexico, and Vermont.
New Mexico: Tunitcha Mountains; Harveys Upper Ranch. Damp woods, in the Canadian Zone.
37. C ALAMO VILFA Scribn. Sand grass.
Rather tall rigid perennials with loosely spreading panicles; spikelets 1-flowered;
rachilla jointed above the glumes but not prolonged beyond the floret, the callus densely bearded; glumes laterally compressed, keeled, chartaceous, awnless, unequal, acute; lemma 1-nerved, acute; stamens 3; styles distinct.
KEY TO THE SPECIES.
Panicle branches erect; spikelets about 6 mm. long 1. C. longifolia.
Panicle branches spreading; spikelets 8 mm. long 2. C. gigantea.
1. Calamovilfa longifolia (Hook.) Hack. True Grasses 113.1890.
Calamagrostis longifolia Hook. Fl. Bor. Amer. 2:241.1840.
Type locality: "Saskatchawan."
Range: British America to New Mexico and Indiana.
New Mexico: Near Texline (Griffiths 5650). Plains, in the Upper Sonoran Zone.
\/ 2. Calamovilfa gigantea (Nutt.) Scribn. & Merr. U. S. Dept. Agr. Div. Agrost.
Circ. 35:2.1901.
Calamagrostis gigantea Nutt. Trans. Amer. Phil. Soc. n. eer. 5:143.1837.
Type locality: "On the sandy banks of Great Salt river of the Arkansas."
Range: Sandy soil, Kansas to Arizona.
New Mexico: A single specimen seen, without definite locality.
38. DANTHONIA DC. Wild oat grass.
Low cespitoseperennials with simple, spreading or narrow panicles; spikelets several- flowered, the uppermost flower imperfect or rudimentary; rachilla jointed above the glumes; glumes 2, much exceeding the lemmas, these rounded on the back, 2-toothed or bifid, awned between the teeth, the awn formed by an extension of the 3 middle nerves of the lemma.
KEY TO THE SPECIES.
lemmas pubescent only on the margin and at the base 1. 73. intermedia.
Lemmas pubescent on the back as well y on the margin.
Glumes 15 to 20 mm. long 2. D. parryi.
Glumes 10 mm. long or less 3, X). apkata.
1. Danthonia intermedia Vasey, Bull. Torrey Club 10: 52. 1883.
Type locality: "California, Rocky Mountains, Plains of British America to Mount Albert, Lower Canada."
Range: British America to California and New Mexico.
i i i i
WOOTON AND BTANDLEY—FLORA OP NEW MEXICO. 81
New Mexico: Horsethief Canyon (Standley 4880). Meadows, in the Canadian Zone.
2. Danthonia parryi Scribn. Bot. Gaz. 21:133.1896.
Type locality: Colorado.
Range: Colorado and New Mexico.
New Mexico: Grass Mountain (Standley 4371). Meadows, in the Canadian Zone.
3. Danthonia spicata (L.) Beauv.; Roem. & Schult. Syst. Vcg. 2: 690.1817.
Avena spicata L. Sp. PI. 80. 1753.
Type locality: "Habitat in Pennsylvania."
Range: British America to New Mexico, Louisiana, and North Carolina.
New Mexico: Harveys Upper Ranch; West Fork of the Gila. Damp woods, in the Canadian Zone.
30. AVENA L. Oats.
Annuals or perennials with rather large spikeleta variously paniculate; spike lets 2 to 6-flowered; rachilla jointed above the glumes, bearded below the lemmas; glumes 2, unequal, membranaceous, longer than the lemmas, these rounded on the back, 5 to 9-nerved, often bidentate at the apex, with a long dorsal twisted awn; grain pubes- cent, at least at the apex, frequently adherent to the lemma or palea.
KEY TO THE SPECIES.
Glumes shorter than the lemmas; panicles lax, somewhat nodding;
lemmas hairy at the base . 1. A, striata.
Glumes longer than the lemmas; panicles open; lemmas often hairy up
to the base of the awn 2. A.fatua.
1. Arena striata Michx. Fl. Bor. Amer. 1: 73.1803.
Type locality: "Sab. in emu Hudsonia per tractus montium ad Canadam,"
Range: British America to New Mexico and Pennsylvania.
New Mexico: Ponchuelo Creek (Standley 4185). Meadows, in the Canadian Zone.
2. Avena fatua L. Sp. PL 80. 1753. Wild oats.
Type locality: "Habitat in Europae agris inter segetes."
Range: Native of Europe and Asia, widely introduced into the United States;
especially common in grain fields.
New Mexico: Shiprock; Carrizo Mountains; Dulce; Cedar Hill; Cleveland; Taos;
Pecos; Mora.
40. DESCHAMPSIA Beauv.
Annuals or perennials with flat or convolute leaves and rather small shining spike lets in terminal or lateral, narrow or loose panicles; spikeleta mostly 2-flowered; rachilla hairy, jointed above the glumes and prolonged beyond the upper floret as a hairy bristle; glumes 2, thin and scarioua, acute or obtuse, nearly equal; lemmas subhyaline, 4-nerved, truncate and more or leas regularly 2 to 4-toothed, awned on the back, the awn slender, twisted below; palea narrow, 2-nerved; grain oblong, free.
f KEY TO THE SPECIES.
Plants low, 20 to 40 cm. high; glumes 4 mm. long; awns much longer
than the lemmas 1. D. alpicola.
Plants tall, 60 to 100 cm.; glumes 3 to 3.5 mm. long; awns little if at
all longer than the lemmas 2. D. caeapitosa.
1. Deachampsia alpicola Rydb. Bull. Torrey Club 32: 601. 1905.
Type locality: Mountain meadows, Pikes Peak, Colorado.
RANG E: Wyoming and Utah to northern New Mexico.
52570*—15 0
82 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM
New Mexico: Truchas Peak; El Rito Creek; Las Vegas Range; near the head of the Nambe. Meadows, in the Arctic-Alpine Zone.
2. Deschampsia ceepitosa (L.) Beauv. Ess. Agrost. 91,160.1812.
Aira ce&jritosa L. Sp. PI. 64.1753.
Type locality: * 'Habitat in Europae pratis cultia & fertilibus."
Range: Arctic America to California, Arizona, Illinois, and New Jersey; also in Europe and Asia.
New Mexico: North of Ramah; Chama; Tunitcha Mountains; Harveys Upper Ranch; Rio Pueblo; Spirit Lake; Silver Spring Canyon. Meadows, Transition to Hudsonian Zone.
41. TRISETUM Pers. False oats.
Cespitose perennials or rarely annuals, with flat leaves and dense, spikelike or narrow, loose panicles; spikelets 2-(rarely 3 to 5 )flowered; rachilla hairy or naked, jointed above the glumes and between the florets, produced beyond the upper flower as a usually hairy bristle; glumes 2, awnless, carinate, unequal, usually longer than the lemmas; lemmas subhyaline, carinate, cleft or 2-toothed at the apex, the teeth sometimes produced into slender awns, awnod between or a little below the teeth;
awns twisted and usually geniculate; palea narrow, 2-toothed; grain smooth, free.
KEY TO THE SPECIES.
Panicles slender, interrupted; plants slender 1. T. interruptum.
Panicles dense and crowded, not interrupted; plants stout.
Leaf blades and sheaths long-hairy; upper part of the stem
densely pubescent 3, T. spicatum.
Leaf blades and sheaths glabrous or the lowest sheath short- pubescent with reflexed hairs; stems glabrous or
slightly scabrous in the inflorescence 2.- T. montanum,
1. Trisetum interruptum Buckl. Proc. Acad. Phila. 1862:100.1863.
Type locality: Middle Texas.
Range: Western Texas and southern New Mexico.
New Mexico: Bishops Cap (IVooton). Upper Sonoran Zone.
2. Trisetum montanum Vaaey, Bull. Torrey Club 13: 118.1886.
Type locality: Not stated.
Range: Wyoming to northern New Mexico.
New Mexico: Winsors Ranch; Cowles; Rio Pueblo; mountains near Laa Vegas;
Eagle Creek. Meadows, in the Transition and Canadian zones.
3. Trisetum spicatum (L.) Richt. PI. Eur. 1:59. 1890.
Aim spiocUa L. Sp. PI. 63.1753.
Aira subspkata L. Syst. Veg. ed. 10. 873. 1759.
Trisetum subspicatum Beauv. Ess. Agrost. 88.1812.
Type locality: "Habitat in Lapponiae Alpibus."
Range: Arctic America to California, New Mexico, and New Hampshire; also in Europe.
New Mexico: Pecoe Baldy; Truchas Peak; Jcmez Mountains. Meadows, in the Arctic-Alpine Zone.
42. BULBILIS Raf. Buffalo ait ass.
Creeping or stoloniferous perennial with narrow flat leaves and unlike staminate and pistillate flowers borne on the same or different plants; staminate spikelets 2 or 3-flowered, sessile in 2 rows along the short one-sided spikes, the glumes obtuse, unequal, the lemmas larger, 3-nerved, the palea 2-nerved; stamens 3; pistillate spikelets 1-flowered, in nearly capitate one sided spikes scarcely exserted from the
' ( k
*
WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 83
broad sheaths of the upper leaves, the glumes 2, or the first sometimes wanting, 3-toothed at the apex, the lemma narrow, hyaline, entire or bifid at the apex; styles distinct;
grain free.
1 Bulbilis dactyloides (Nutt.) Raf.; Kuntze, Rev. Gen. PI. 763. 1891.
Sesleria dactyloides Nutt. Gen. PI. 1: 65. 1818.
Buckloe dactyloides Engelm. Trans. Acad. St. Louis 1:432.1859.
TyrE locality: "On the open grassy plains of the Missouri."
Range: North Dakota and Minnesota to Arkansas and Mexico.
New Mexico: Sierra Grande; Nara Visa; Raton; Santa Fe; Coolidge; Pecoe; Logan;
Buchanan; Mesilla Park. Plains, in the Upper Sonoran Zone.
43. LEPTOCHLOA Beauv.
Mostly tall annuals with flat leaves and elongated simple panicles composed of numerous more or less spreading, slender spikes scattered along the main axis; spike- lets 2 to several-flowered, sessile in 2 rows along one side of the slender and often numerous branches; rachilla jointed above the glumes, these 2-keeled, awnless or very short-awned; lemmas carinate, 3-nerved, acute, awnless or very short-awned or 2 or 3-toothed, mucronate or short-awned between the teeth; palea 2-keeled.
KEY TO THE SPECIES.
Spikelets 2.5 mm. long or less, broad, 2 to 4-flowered.
Sheaths pilose. 1. L. fili/ormis.
Sheaths not pilose 2. L. nealleyi.
Spikelets 3 mm. long or more, narrow, 5 to 12-flowered.
Lemmas pubescent at the base; annual 3. L. /asdcularis.
Lemmas glabrous; perennial 4. L. dubia.
1. Leptochloa filiformis (Lam.) Beauv. Ess. Agrost. 71. 1812.
Fesluca Jili/ormis Lam. Tabl. Encycl. 1:191. 1791.
Eleusine mucronata Michx. Fl. Bor. Amer. 1: 65. 1803.
Leptochloa vmeronata Kunth, R6v, Gram. 1: 91. 1835.
Type locality: "Ex Amer. Mend."
Range: Virginia and Florida to California and Mexico; also in the West Indies and southern Asia.
New Mexico: Hillsboro; Mesilla Valley. Sandy fields, in the Lower Sonoran Zone.
2. Leptochloa nealleyi Vasey, Bull. Torrey Club 12: 7. 1885.
Type locality: Texas.
Range: Western Texas and southeastern New Mexico.
New Mexico: Carlsbad (Tracy 8191). Plains.
3. Leptochloa fascicularis (Lam.) A. Gray, Man. 588. 1848.
Festuca fascicularis Lam. Tabl. Encycl. 1:189.1791.
Festuca procumbens Muhl. Descr, Gram. 160. 1817.
Uralepis composita Buckl. Proc. Acad. Phila. 1862: 94. 1863.
Diplachne procumbens Nash in Britton, Man. 128.1901.
Type locality: "Ex Amer. Merid."
Range: Maryland and Florida to South Dakota and Mexico.
New Mexico: Salt Lake; Socorro; Mesilla Valley; Roswell; Carlsbad. Sandy fields, in the Lower Sonoran Zone.
The type of Uralepis composita was collected in New Mexico by Woodhouse.
4. Leptochloa dubia (H. B. K.) Nees, Syll. PL Ratisb. 1: 4.1824. Sfrangle.
Chloris dubia II. B. K. Nov. Gen. Sp. 1:169. 1815.
Diplachne dubia Scribn. Bull. Torrey Club 10: 30.1883,
84 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM.
Type locality: " Creed t in apricis Bubhumidis prope rupem porphyreticam el Penon, in convalle Mexicans, alt. 1168 hexap."
Range: Arizona and western Texas to Florida and Mexico.
New Mexico: Mangas Springs; near White Water; Dog Spring; near Silver City;
Organ Mountains; Tortugas Mountain; Carlsbad. Dry hills, in the Lower and Upper Sonoran zones.
44. ACAMPTOCLADOS Nash.
Tufted perennial with stiff stems, involute leaves, and a panicle of scattered, dis- tant, widely spreading, rigid branches; spikelets scattered, singly disposed in 2 rows, sessile, 4 to 6-flowered; glumes sub equal, acuminate, the first 1-nerved, the second usually 3-nerved; lemmas 3-nerved, acute, indurated in fruit; palea compressed, the 2 nerves ciliolate, gibbous at the base; stamens 3; styles distinct.
1. Acamptoclados sessilispicus (Buckl.) Nash in Small, Fl. Southeast. U. S. 140.
1903.
Eragrostis aessilispica Buckl. Proc. Acad. Phila. 1862: 97.18G3.
Diplachne rigida Vasey, U. S. Dept. Agr. Div. Bot. Bull. 12: pi. 41- 1891.
Type locality: Near Austin, Texas.
Range: Kansas and Texas to eastern New Mexico.
New Mexico: Sands south of Melroae; Nara Visa. Plains, in the Upper Sonoran Zone.
45. BECKMANNIA Host. Slough grass.
Tall erect plant with flat leaves and terminal elongated inflorescence; spikelets 1 or 2-flowered, compressed, imbricated in 2 rows along one side of the rachis of the short jikes; glumes narrow, boat-shaped, obtuse or abruptly pointed, nearly equal;
lemmas narrow, acute or mucronate; palea hyaline, 2-keeled; stamens 3; styles short, distinct; grain oblong, inclosed within the rigid fruiting lemma and palea, free.
1. Beckmannia erucaeformis (L.) Host, Icon. Gram. Austr. 3: 5, 1805.
Phalaris erucaeformis L. Sp. PI. 55. 1753.
Type locality: "Habitat in Siberia, Russia, Europa australi."
Range: British America to California, New Mexico, and Iowa; also in Europe and Asia.
New Mexico: Farmington; Chama; Grants Station; Zuni. In marshes and along streams, in the Transition Zone.
46. CAPRIOLA Adans.
Low creeping perennial with short flat leaves and slender spikes digitate at the apex of the erect branches; spikelets 1-flowered, awnless, sessile in 2 rows along one side of a slender continuous axis, forming unilateral spikes; glumes narrow, keeled, usually acute; lemma broader, usually slightly longer than the glumes, obtuse, pilose on the keel and margins; palea about the length of the lemma, 2-keeled; stamens 3;
styles distinct; grain free.
1. Capriola dactylon (L.) Kuntze, Rev. Gen. PI. 2: 764. 1891. Bermuda grass.
Panicum dactylon L. Sp. PI. 58. 1753.
Cynodon dactylon Pers. Syn. PI. 1: 85. 1805.
Tyte locality: "Habitat in Europa australi."
Range: Native of the Old World, widely introduced in southern North America, often cultivated as a lawn grass.
New Mexico: Mesilla Valley.
Bermuda grass is often employed in New Mexico for lawns. It is especially valu- able for this purpose in the southern part of the State, since it is resistant to heat and drought. Sometimes it becomes a troublesome weed in cultivated fields.
WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 85
47. SCHEDONAUDITS Steud. Texan crabgrass.
Low, diffusely branched perennial with short narrow leaves and slender paniculate spikes; spikelets 1-flowered, hermaphrodite, sessile, scattered along one side of the slender rachis of the widely spreading spikes; racliilla jointed above the glumes, these narrow, slightly unequal, membranaceous; lemmas longer than the glumes, mem- branaceous, becoming somewhat rigid, acuminate or minutely mucronate; stamens 3;
styles distinct; grain inclosed within the rigid lemmas and palea but free.
1. Schedonardus pauiculatus (Nutt.) Trel. Rep. Ark. Geol. Surv. 1888*: 236.1891.
Lepturus paniculatus Nutt. Gen. PI. 1: 81. 1818.
Schedonardus texanus Steud. Syn. PI. Glum. 1: 146. 1855.
Type locality: "On dry saline plains, near Fort Aland an, on the Missouri."
Range: Manitoba and Saskatchewan to New Mexico and Texas.
New Mexico: From the Mogollon and White Mountains northward and eastward throughout the State. Dry hills and plains, in the Upper Sonoran Zone.
48. BOUTELOTTA Lag. Grama grass.
Low annuals or perennials, with narrow, flat or convolute leaves and few or many unilateral spikelets nearly sessile along a common rachis; spikeleta 1 or 2-flowered, numerous, crowded and closely sessile in 2 rows along one side of a continuous flattened rachis, this usually projecting beyond the spikelets; rachilla articulated above the glumes, the continuation beyond the hermaphrodite floret usually bearing a few rudimentary glumes and 3 awns; glumes unequal, the lower smaller, keeled; lemma broader, 3-nerved, 3 to 5-toothed or cleft; palea 2-nerved and 2-toothed; grain free.
KEY TO THE SPECIES.
Spikes numerous, 5 to 60; spikeleta few, usually less than 12.
Spikes 30 to 60, each with 4 to 10 spikelets 1. B. curtipendula.
Spikes 5 to 11, each with 3 to 6 spikelets 2. B. radicosa.
Spikes few, 1 to 6; spikelets numerous, 25 or more.
Annuals.
Spikes solitary; plants low, tufted 3. B. procumbent.
Spikes more than one; plants various.
Spikelets closely appressed to the rachis, forming a
cylindrical spike... 4. B. aristidmdes.
Spikelets crowded on one side of the rachis, making it one-sided.
Plants 30 cm. high or more, the stems erect S. B. parryi.
Plants 10 to 15 cm. high, the stems spreading.. 6. B. barbata.
Perennials.
Spikes loose, more or less cylindric; lower part of stems
densely woolly 7. B. eriopoda.
Spikes with more numerous crowded spikelets, one- sided ; stems not woolly.
Glumes smooth or slightly roughened 8. B. brevi&eta.
Glumes stiff-hairy.
Spikes 3 to 5, short and broad; rachis extended
much beyond the spike... 9. B. hirsute.
Spikes 1 to 3, mostly 2, long and narrow; rachis
but slightly extended 10. B. gradUs,
1. Bouteloua curtipendula (Michx.) Torr. in Emory, Mil. Reconn. 154. 1848.
Tall graua.
Chloris curtipendula Michx. Fl. Bor. Amer. 1: 59. 1803.
Bouteloua racemosa Lag. Var. Cienc. 24:141, 1805.
86 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM,
Atheropogon eurtipenduhia Fount. Mex. PI. 2: 138. 1881.
Type locality: "Hab. in aridis regionis Illinoensis ad Wabosl et in rupibus ad prairie du rocher."
Range: British America to New Jersey, California, and Mexico.
New Mexico: Common throughout the State. Plains and hillsides, in the Upper Sonoran and Transition zones. An important range grass in some parts of the State.
2. Bouteloua radicosa (Foum.) Griffiths, Contr. U. S. Nat. Ilerb. 14: 411. 1912.
Dinebra bromoides H. B. K. Nov. Gen. & Sp. 1:172. pi. 51. 1816, not Bouteloua bromoides Lag. 1816.
Atheropogon radicosu# Foum. Mex. PI. 2:140. 1881.
Type locality: Mexico.
Range: California and New Mexico to Mexico.
New Mexico: Mangas Springs; Burro Mountains; Mogollon Creek. Dry hills, in the Upper Sonoran Zone.
3. Bouteloua procuznbens (Durand) Griffiths, Contr. U. S. Nat. Herb. 14: 364.
1912. Six-weeks grama.
Chloris procumbens Durand, Chlor. Sp. 1808.
B&uUloua prostrata Lag. Gen. & Sp. Nov. 5.1816.
Bouteloua pusilla Vasey, Bull. Torrey Club 11: 6. 1884.
Type locality: Not ascertained.
Range: Colorado and Arizona to Mexico.
New Mexico: Cedar Hill; Tierra Amarilla; Chama; Santa Fe; El Rito Creek;
Ensenada; Las Vegas; Grants; Pecos; Roy; Kingston; West Fork of the Gila; White Mountains. Sandy soil, in the Upper Sonoran Zone.
The type of B. pusilla was collected at Kingman by G. R. Vasey, in 1881.
4. Bouteloua aristidoides (H. B. K.) Griseb. Fl. Brit. W. Ind. 537.1864.
Six-weeks grama.
Dinebra ariatidoides H. B. IC. Nov. Gen. & Sp. 1:171. 1816.
Triathera aristidoides Nash in Small, Fl. Southeast. U. S. 137. 1903.
Type locality: "Creseit in asperis frigidis con vail is Tolucensis, alt. 1320 hexap."
Range: California and western Texas to Mexico and South America.
New Mexico: Bear Mountain; Deming; Socorro; Dog Spring; Organ Mountains;
Las Cruces. Dry plains and hills, in the Lower Sonoran Zone.
Y 5. Bouteloua parryi (Foum.) Griffiths, Contr. U. S. Nat. Herb. 14: 381. 1912.
Sandhill grama.
Chondrosium parryi Foum. Mex. PI. 2:150. 1881.
Bouteloua poly&tachya vestita S. Wats. Proc. Amer. Acad. 18: 177. 1883.
Bouteloua vestita Scribn. Contr. U. S. Nat. Herb. 2: 531. 1894.
Type locality: Near San Luis Potosf, Mexico.
Range: Western Texas to southern Arizona and Mexico.
New Mexico: Mesilla Valley; mesa west of Organ Mountains; Jarilla Junction.
Mesas, in the Lower Sonoran Zone.
6. Bouteloua barbata Lag, Var. Cienc. 24: 141.1805. Six-weeks grama, Chondrosium polystachyum Benth. Bot. Voy. Sulph. 56, 1844.
Bouteloua polystachya Tom U. S. Rep. Expl. Miss. Pacif. 5s: 366. 1857.
Type locality: Described from cultivated plants.
Range: California and Utah to Mexico.
New Mexico: Carrizo Mountains; San Juan Valley; Chama River; Albuquerque;
Socorro; Mangas Springs; Santa Rita; Deming; Black Range; Dog Spring; Mesilla Valley; Organ Mountains; White Sands; Pecos Valley. Sandy fields and mesas, in the Lower and Upper Sonoran zones.