362 
APPENDIX. 
Perityse Emoryi, Torr. & Gray , in Emory’s Hep. p. 142. On both sides of the Colorado, and 
west to the mountains. The characters seem to he constant. 
Asclepias (Otaria) subulata, Decaisne in DC. Prodr. 9, p. 571. In the desert; not uncommon. 
It occurs also in Lower California. This is the species which, in the botany of Whipple’s 
expedition, we suspected might be A. subulata. We now possess better specimens, with the leaves, 
and have scarcely a doubt that it is the species described by Decaisne under that name, notwith¬ 
standing the description does not apply in all respects. The stem is erect, 2-4 feet high, straight, 
simple, or sparingly branched above, either smooth and glaucous, or somewhat pubescent. The 
leaves are almost filiform, and erect; the lower ones nearly two inches long. Umbels sometimes 
solitary, but more commonly several in a terminal panicle, 10-20-flowered; peduncles 1-2 inches 
long, erect; pedicels 6-8 lines long, and like the peduncles, pubescent. Flowers about as large 
as in A. variegata. Sepals broadly ovate, acute. Petals (apparently white) ovate-oblong, 
rather acute, reflexed. Hoods of the crown twice as long as the nearly sessile gynostegium, 
dilated above, slightly toothed at the summit; horn somewhat exserted. Follicles about 4§ 
inches in length, narrowly oblong, acute at the base, much attenuated above, smooth and even. 
(Tab. VII.) 
Sarcostemma heterophyllum {Engelm. Mss.) : volubile, glabrum ; foliis petiolatis inferioribus 
lineari-lanceolatis hastatis, superioribus linearibus ; pedunculis glabris elongatis folia superan¬ 
tibus; pedicellis calycibusque pubescentibus; corolla rotata glabra, margine fimbriata coronas 
interioris lobis ovato-globosis gynostegii subbreviores. Hear Fort Yuma; August-September. 
Stem 10-20 feet long. Lower leaves cordate-hastate at the base, 2-3 lines wide, the upper ones 
merely obtuse at the base, and 1-1J line wide. Flowers pale purple. This is 1679 of Wright’s 
Hew Mexican collection. 
Lippia nodielora, Michx , FI. 2, p. 15. Alluvial banks of the Colorado; flowering through 
the summer. The leaves vary considerably in form. Some of the specimens show a transition 
to L. lanceolata. 
Hama biflora, CJioisy in DC. Prodr. 10, p. 183; var. spathulata, Torr. in Capt. Parke’s 
Rep. California Desert; flowering through the summer. 
Hicotiana multiflora, Nutt. Plant. Gamb.? On the Colorado and in other parts of California; 
September. We cannot be sure that this is Huttall’s plant. It is about 2 feet high, minutely 
pubescent, viscid on the upper part of the stem. The radical leaves are wanting in the speci¬ 
mens ; the cauline are 2 inches long, oblong-spatulate entire, clasping and auriculate at the 
base. Flowers in a loose panicle ; the pedicels 2-4 lines long. Calyx campanulate, the 5-cleft 
segments lanceolate and nearly equal. Corolla tubular, with a small, somewhat spreading 
border, about 8 lines long, pale dull yellow. Capsule 2-valved, the valves deeply 2-parted. It 
seems to belong to the section Rustica of Dunal. 
Physalis. Three species were found near Fort Yuma by Major Thomas, but we have laid 
them aside until we make an examination of all the Horth American species of this puzzling 
genus. 
Datura Thomasii (n. sp.): annua, caule erecto (humili) ; foliis ovatis repandis v. sinuato- 
dentatis glabriusculis ; floribus brevi-pedicellatis ; corolla calyce pentagono acute dentato duplo 
longiore ; capsula globosa nutante aculeata, aculeis validis pubescentibus. Hear Fort Yuma; 
Sept.-Oct. Stem 12-18 inches high. Flowers nearly one-third smaller than in D. Stramonium. 
Corolla white, tinged with purple on the inside, near the summit. Fruit, (without the prickles,) 
about an inch in diameter. Seeds blackish, tuberculate-rugose. This appears to be different 
