Engelmann, George Feb. 6, [1845] [3] (seq. 137)

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4)
Dry prairies near San Felipe on the Brazos; Febr. & March.
It is very possible that this may be one of the already described species, but it
appears to me to differ from all as they are described in Torr & Gr. Flora. I could
compare it only with {Vesicaria} grandiflora. This has a stallate
pubescens; greenish, canescent
[drawing] sepals, obcordate petals, sagittate anthers; V. repanda has
subulate filaments; V.
angustifolia has a stellate pubescence, and leaves attenuated at base; V.
nutallii

has leaves narrowed at base, and a different silicle, V. gracilis has subulate
filaments, leaves narrowed at base, seeds not margined and V. shortii has
very
short styles.

From the examnation of 2 specimens of V. grandiflora collected also west
of the Brazos, I am enabled to add the following characters: sepals greenish
stellately canescent, like the whole plant; anthers sagittate with spreading lobes;
cauline leaves sessile, cordate and somewhat dilated at base.
218. Nasturtium tanacetifolium Hook & Arn. Sandy open places in the millcreek bottom. Febr
and March. — Siliques incurved in some specimens nearly erect in others patulous!
In spec-
imens collected in a sterile prairie we find the leaves less divided.
219. Sisymbrium canescens Nutt var. α. Sterile sandy places in
prairies west of the
Brazos; a very canescent form.
220. Polygala alba (P. beyrichii Torr & Gr. Prairies west of the Brazos; lower
leaves frequently obovate spathulate.
221. Hypericum maculatum Walt. Open woods and margin of woods from
Galveston to
the Colorado; May.
222. Paronychia dichotoma Nutt On Sandstone rocks near Industry; Septemb
& Octobr
223. Arenaria pitcheri Nutt. Prairies west of the Brazos; March. Petals twice
the length
of the calyx emarginate.
224 Ptelea trifoliata L. β mollis T & Gr. Along water courses west of
the Brazos, April.
Also near Houston.
225. Aesculus pavia L. β discolor Torr & Gr. Thickets along the
banks of Millcreek, west,
of the Brazos; March.
226 Sapindus marginatus W. {Willd.} Fertile woods near streams, west of the
Brazos, fruit
ripe in August. Popularly called "Wild Chinatree"; it grows about one
foot in diameter.
227. Rhamnus caroliniana Walt. Small trees forming thickets on wet places
in the
Prairie west of San Felipe, fl. in May. — Var. β parvifolia leaves only
2 to 3 inches long, with 7 to 9 pairs of lateral veins, pubescent on the ribs below;
leaves and flowers crowded.
228. Rhamnus lanceolatus Pursh in thickets along the Millcreek; fl. in March.
229. Tephrosia onobrychoides Nutt San Bernadio's Prairie, west of San Felipe,
in May. —
Stem assurgent one to two feet high; pubescence rusty, short, appraised;
calyx teeth short hispid, not villous, as in the variety sent from Houston, No. 32.
230. Astragalus caryocarpus Ker. Prairies west of San Felipe, April.
231. Lupinus subcarnosus Hook. Prairies west of the Brazos, April. —
Branching from the base;
from 5 to 15 inches high; flowers smaller, paler, inflorescence more silky or
lanuginous than
in the nearly related L. texensis Hook, of which we find a a few specimens
mixed with those
of L. subcarnosus.
232. Cassia chamaecrista L. } cinera Torr & Gr. Sandy places in the
woods along the Colorado river Aug.
Perhaps a distinct species, characterized not only by the characters noted by Torrey
& Gray,
Flor I, p. 396 but also by the stipitate gland on the petiole below the lowest
pair of leaflets,
the setaceous glands between the 4 or 6 lower pairs (wanting in C.
chamaecrista
)
and by the indistinct (not very plain, as in C. ch.) veins of the acute (not obtuse)

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