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1—Late Wisconsin and Holocene packrat midden records of Poa jendleriana (sex, race, numbers of specimens, and associated midden data and paieovegetation).

Locality—Midden

Eieva- Radiocarbon date

tion (m) (years B.P.) Laboratory no. Paieovegetation

Poa jendleriana material

Arizona: Pima Co.

Ajo Mountains

Montezuma's Head #1A Santa Gatalina Mountains

Pontatoc Ridge #4B

Pontatoc Ridge #81-2 Utah: San Juan Go.

Abajo Mountains Allen Canyon #7 Allen Canyon #8 Allen Canyon #2 Allen Canyon #6 Allen Canyon #5 Allen Canyon #4 Fishmouth Cave #3 Fishmouth Cave #5 Fishmouth Cave #6 Fishmouth Cave #9

975 20,490 ± 510 A-1695

1,555 17,950 ± 960 A-1851

1,555 16,400 ± 400 A-2682

2,195 11,310 ± 70 BETA-5756 2,195 10,140 ± 190 A-3120 2,195 7,200 ± 90 BETA-5586 2,195 3,400 ± 60 BETA-5583 2,195 3,000 ± 70 BETA-5585 2,195 1,820 ± 50 BETA-5766 1,585 10,540 ± 180 BETA-5757

Pinyon-juniper-Joshua tree woodland Arizona cypress forest

Arizona cypress forest

Mixed-conifer forest Mixed-conifer forest Pine forest

Pinyon-juniper woodland Pinyon-juniper woodland Pinyon-juniper woodland Mixed-conifer forest 1,585 9,700 ± 110 BETA-5763 Juniper woodland 1,585 3,550 ± 60 BET A-5764

1,585 2,260 ± 90 BETA-5765

Juniper woodland Juniper woodland

11 florets, sex indet, no seed = P. j. cf. longiligula

Spikelet with 3 pistillate florets = P. j. longiligula or P.

j. jendleriana, or intermediate seed; pistillate floret = P. j. cf. albescens

Staminate floret = P. j. jendleriana

Spikelet with 2 florets with seed, 3 pistillate florets = P.

j. longiligula or P. j. jendleriana or intermediate Floret, sex indet. — P. j. longiligula or P. j. jendleriana

or intermediate

80 pistillate florets, 50% with seed = P. j. jendleriana or intermediate

Staminate floret, pistillate floret without seed = P. j.

jendleriana

5 florets—2 ca. staminate, 2 ca. pistillate, no seed = P.

j. longiligula or P. j. jendleriana or intermediate 4 florets—3 pistillate, 2 with seed = P. j. longiligula 10 florets—7 pistillate, 2 with seed = P. j. longiligula or

P. j. jendleriana or intermediate

9 florets—6 pistillate, 2 with seed = P. j ca. jendleriana or intermediate

8 pistillate florets, 3 with seed = P. j. jendleriana

9 pistillate florets, 5 with seed = P, j. longiligula

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O B