APPENDIX. 
363 
from any Datura described by Dunal. We have received it only from the Great Colorado. 
Specimens collected by Mr. Schott have the spines less thickly set, and the leaves more strongly 
toothed. 
Lycium barbinode, Miers , III. South Am. Bot. 2 p. 115, t. 68, E. Colorado Desert; March. 
Mohave viscida, Torr. & Gray, Bot. Whipple's Rep. With the last. Flowers apparently 
sulphur-yellow, speckled towards the base with purple. The prominent palate saccate, purple, 
bearded with yellow hairs. Style cylindrical, nearly as long as the stamens ; stigma capitate. 
The fruit of this remarkable plant is not yet known, but there can now remain little doubt of 
its having been rightly placed near Martynia. 
Phacelia cIliata, Benth. in Trans. Linn. Soc. 1-7, jp. 280. Near Fort Yuma. This species 
is to us one of the rarest of the genus. 
Cilia liniflora, Benth. 1. c. in DC. Prodr. 9, p. 315. San Matio, near San Francisco. 
Fouquiera splendens, Engelm. in Wisliz. Mem. N. Mex. p. 98 On the Colorado and Lower 
Gila, westward to the mountains. 
Eritrichium angustifolium (n. sp.): annuum, pilis patulis hispidissimum; caule e basi ramoso ; 
foliis linearibus ; racemis paucifloris ; floribus sessilibus, calyce hispido, sepalis lanceolato-lineari- 
bu's; corolla hypocraterimorpha (alba) ; nuculis ovatis acutis minutissime granulatis. With the 
last. Plant 6-12 inches high, slender, the lower branches often prostrate, hispid with white (or, 
on the inflorescence, yellowish) spreading hairs. Leaves an inch or more in length, and scarcely 
a line wide. Eacemes about half an inch long, the flowers closely approximated. Sepals very 
hispid. Corolla white, falling early, less than a line long ; segments of the limb obovate, 
very obtuse and entire. Stamens with very short filaments, which are inserted near the base 
of the tube. Nutlets extremely minute, convex, and minutely papillose on the back, acutely 
angular on the face, one or more of them often abortive. This species is not rare in Cal¬ 
ifornia, and I think it occurs also in Oregon. There are specimens of it in the herbarium 
of the Philadelphia Academy of Natural Sciences, named by Nuttall, “ Myosotis (Aphanisma) 
pygmasa,” but the plant is evidently an Eritrichium, as that genus is now characterized. The 
manuscript specific of Nuttall is changed, because it is not applicable. 
Pectocarya linearis, DC. Prodr. 10, p. 120. Near Fort Yuma. The specimens agree with 
Chilian ones in our herbarium. 
Heliotropium Cctrassavicum, Linn.] DC. Prodr. 9, p. 538. Common in most places where 
the soil is saline, from the Colorado to the Pacific. 
Acanthogonum rigidum, Torr. Bot. of Whipple's Rep. Near Fort Yuma. The specimens 
are in an early state, and enable us to correct and complete the characters of this genus, as 
given in the work just quoted. We have also seen a specimen of the plant in a small collection 
made by A. B. Gray, Esq., while making the survey of a route for a Southern Pacific Railroad, 
near the parallel of 32°. The plant seems never to attain a greater height than about 3 inches ; 
beginning to flower immediately above the cotyledons. It is furnished with both radical and 
cauline leaves, which are ovate or obovate, half an inch long, mostly obtuse ; the base tapering 
to a petiole which is about twice the length of the lamina. Involucres in axillary sessile clus¬ 
ters, subtended by long straight subulate and spine-like divaricate bracts. Involucre always 
3-cleft; the segments very unequal, one of them sometime^ much elongated, straight. Perianth 
yellow, campanulate-funnelform, hairy at the summit. Stamens 9, included: filaments inserted 
at the upper part of the tube. Ovary oblong, acute at each end, rough on the angles towards 
the summit. 
