160 
BOTANY. 
Vesicaria Fendleri, Gray, PI. Fendl. p. 9 ; V. stenophylla, Gray, PI. Lindli. 2, p. 149. 
Everywhere on Delaware creek, the Pecos, Llano Estacado, &c.; March, April. To this, it is 
now evident, belongs the Y. stenophylla; and the species exhibits great diversities in its mode 
of growth and foliage, as also in the size and even the shape of its pods. The name Y. Fend- 
leri is the older one; that of Y. stenophylla is applicable only to some of the forms which the 
species assumes. 
Yesicaria Ludoviciana, DO. Syst. 2 ,p. 297. On the Pecos; March. Not in flower. 
Draba cuneifolia, Nutt, in Torr. and Gray, FI. 1, p. 108. Delaware creek to the Colorado. 
Selenia dissecta, (n. sp., Plate I.) Leaves bipinnately divided, the segments linear; style 
not longer than the ovary; valves of the pod imperfectly one-nerved; seeds on short and thick 
funiculi.—In sandy or gravelly soil, from Delaware springs to the Llano Estacado; March and 
April. In flower, and with some mature fruit. This second species of Nuttall’s genus Selenia 
is perhaps the most interesting plant of the present collection. It is a sort of biennial, (like so 
many of this region,) the plant having grown from the seed the preceding autumn, and begun 
to flower early in the following spring. The earliest flowers, borne on slender peduncles, spring 
directly from the crown, among the tufted radical leaves. Later, an ascending and sparsely 
leafy stem rises to the height of from three to six inches, and hears a raceme of leafy-hracted 
flowers, in the manner of L. aurea. The blossoms appear to he considerably larger than in 
that species, at least the earlier ones, the petals being fully half an inch long; hut their form, 
and apparently their color, is the same. The leaves are all pinnately divided, with their 
primary divisions pinnately 3-9-parted. The anthers are linear, rather than oblong. The 
style, although slender, is hardly as long as the ovary: stigma rather large, depressed. The 
silicle is elliptical, slightly inclined to ohovate, very flat, seven to eight lines long, scarcely 
stipitate, rounded at the summit, and abruptly tipped with the comparatively short style; 
valves minutely reticulate-veiny; a mid-nerve is usually evident from the base to the middle, 
or sometimes even to the summit. Septum complete in the specimens examined, obscurely 
two-nerved in the middle; the areolae large, and nearly as in L. aurea. The seeds resemble 
those of that species, hut are borne on short and thick funiculi, the base of which is somewhat 
adnate to the margin of the septum; and the ccecal pouch at the hilum is small, or indistinct. 
Cotyledons orbicular; accumbent against the ascending radicle, which is on the side remote 
from the placenta. As already shown, (in Gen. III. 1, p. 158,) the genus belongs to the Alys- 
sineas. 
Lepidum Alyssoides, Gray, PI. Fendl. p. 10. Llano Estacado; April. 
Lepidum Wrightii, Gray, PI. Wriglit. 2, p. 15. On the Pecos, Colorado, &c. 
Lepidum intermedium, Gray, l. c. Near Fort Washita; April. 
CIST ACE A3. 
Lechea minor, Lam.; Torr. and Gray, FI. 1, p. 153. On the Llano Estacado; March. 
Without flowers or fruit. 
CARYOPHYLLACEiE. 
Silene Antirrhina, Linn. On the upper Colorado, Texas; April. 
Paronychia Jamesii, Torr. and Gray, FI. 1, p. 170. Guadalupe mountains, New Mexico. 
Without flowers. 
MALYACE2E. • 
Callirrhoe digitata, Nutt.; Gray, PI. Fendl. p. 17. On the upper Colorado, Texas; 
April. 
Callirrhoe involucrata, Gray, l. c. A small variety. On the upper Colorado; April. 
