The spores appear intermediate between the riparia and echinospora varieties in sculpture, some of the markings being irregularly walled, others broad, often forked spinules as in Braunii. Coville at the foot of Washington's estate, Mount Vernon, Va., do not quite agree, but apparently relate the variety to the typical form of the species. Also Tidal Beach, Anacostia River, Washington, D. Type specimens are deposited in the herbarium mentioned in the description of the precursor variety.f A. Common on the tributaries of the East Branch.
I would like to draw attention to the fact that the tur plant has not only the long awn on the lower flowering scale, but also an awning in a slot on top of the upper flowering scale. The soft deep-green or yellowish-green foliage of the former differs entirely from the firm glaucous or gray-green leaves, the basal part of which survives the winter as in C. May 30, 1901; original locality, June 8), and having also collected the species of normal size in the grass near the monument, where it is well established, no doubt having been introduced in grass seed, I can find no essential difference between the forms except in the length of the culms, which may not be native plant softer 2, sometimes even 3, feet, but in the Monument the terrestrial plant does not exceed 16 inches.
In a note under this species, Britton and Brown refer to 'a form having numerous small spines on the lower part of the stem, and more oblong, sometimes halberd-shaped leaves', called S. The absence of bracts in most racemes, as well as the larger length of the last Our plant has the distinct peculiarity that all floating leaves except the two lower ones, and sometimes these too, are lobed at the base, giving the leaf a curved shape.
Some of the material planted in the Eastern Branch was brought from Japan with goldfish, but this is probably an error, as no species of Cabomba has been reported from that country.
Aconitum uncinatum L
As Cabombais known to have been planted in the Eastern Branchforuse inaquaria, it has doubtless spread from that source, and. In the ordinary descriptions these leaves are said to be entire, but Gray in the illustrated genera says "oremarginate."
Ranunculus pusillus Poir
Ranunculus acris L
Ranunculus micranthus Nutt
Thalictrum purpurascens L
Thalictrum dioicum L
Papaver dubium L
Barbarea Barbarea (L.) MacM
A small tree apparently of this species stands west of the railway on the edge of the dump at Eckington, (25 May 1900). If this determination turns out to be correct, it will be a fair question whether the trees mentioned in Wyk's Flora as Pyrus coronaria are not also of this species. Near Brightwood Swamp, July 24, 1897; since then collected on the flats opposite Alexandria, and one mile north of Berwyn.
Our plant, however, rarely has the leaves "2 inches long," and some specimens growing with the others have leaves nearly or quite narrow enough for the type. Asaph's, on the gravel flats, especially west of the road at Jackson City (abundant), at a point on the Riggs road near Northwest Branch and near Bladensburg. The emergence of the stamen-laminate flowers from the involucre is not a reliable character, as some of the finest Virginica I have seen have them well developed.
A low, sturdy form of this species occurs on broken ground, without the slender branches, and with an abundance of small leaves and fruits.
Helianthemum Canadense (L.) Michx
Lechea minor L
Probably not a rarity; but I suspect that the material previously mentioned here belongs in part or in whole to one of the following species. Specimens were collected on April 27th, May 1st, and May 10th, 1900, those of the first date not yet in full bloom, those of the last in full bloom. At the same time, it strangely imitates the true cucullat, that is, the bare pale-green blue-flowered bog-meadow violet, not only in the color of the corollas and pale-green herb, but also in the shape of the leaves, the length of the petioles, etc., etc.
The species is the most interesting new of all that I have been called upon to name and describe in recent years: and this due to the fact that in the volume of LeConte's colored drawings executed eighty years ago, and now in my possession, this very plant is the subject of one of his most beautiful figures; and I have wondered for several years when this almost mythical plant, so clear in its specific character according to LeConte's pencil and brush, would appear and where it would come from. In reading this note of his, it must be remembered that F cucul. lata LeConte did not mean what I have established tobetruecucullata,. the marsh meadow plant, but on the other hand F. papilionacea. A patch of common ivy was seen in the woods below Congrees Heights in 1897 or 1898.
I am of opinion that the plant which has passed asvarietinitida here is only a state of the glauca variety. Dewey collected this plant near Four Mile Run in October, 1898, and he has thus designated specimens collected by me on the flats of the Potomac, August :5, 1900. Linnaeus founded Lycopus Virginirmon (Jronovius. The latter in the Flora Virginica of his first, and quotes176, at the beginning of his Flora Virginica, and quotes17, has extracted the latter. icion , adding: "AbhacverticiHismagisapproxi- matis,et foliisprofundiusserratisdiff'ertLycopusCanadensisglaberfoliis integris dentatis 1).
If it only occurred here and there with the type, it might be explained perhaps by a combination of shade and rich soil: on the contrary, it is some self-consistent area far from being the same as that type, namely, from Oregon eastward through Nebraska and Minnesota to of northern and central Michigan. One or two specimens believed to be this were collected in 189(5 at Avoods on the Virginia shore of the Potomac, somewhere above the Aque duct Bridge. Mostly on hills; Linnaean Hill Road, Rock Creek Park, Glen Echo Heights and various points on the Virginia side of the Potomac.
Leaves light green above, pale and puberulent or shining beneath, the larger from 5 to 7 inches long, and from 1^ ton nearly 3 inches broad, the upper part oblong-ovate, acuminateor at least acute, below more or less abruptly curved-contracted in a marginal stem tapering almost or rather. the narrow portion of variable length; the upper leaves are smaller and more nearly spiky at the base: inflorescences scattered and others flat on top, the branches stiff, zigzag, densely puberulent, sometimes . lijtletomentose: sheath around H-lines broad, the scales cuspidate, subulate-acuminate, or short-awned, the exposed portion purple throughout, or green with purple edges and tips, membranous-ciliate, scaly, when present, often more or less upward barbells : pappus straw-colored, from almost white to a rather bright yellow: pains of one-fourths-fifth as thick are long. The diagnosis in the Hortus Elthamensis of Dillenius, on which the Linnaean'Serratniaglaucawa is based, alludes to the light-colored pulp, but recent authorities have taken no account of this striking and substantial character, but seem to have attached any importance to the peculiar contraction of the lower part of the leaf, nor to it. any emphasis laid on the difference, compared with Noreboracen*)*, in the habit and inflorescence. Specimens from Bethesda Park and elsewhere agree information of leaf with the figure in Britton and Brown's Flora; but collections from along the river at Glen Echo, Chautauqua, and GreatFalls show a remarkable broadening of the leaf without elongation of length.
According to the latter the stem is "usually smooth below, rough and hispidulous above", according to the former the stem is. That of the illustrated flora is more faithful to Rafinesque, but leaves our plant without a name.
