BOTANY. 
77 
half long, ovate-elliptical, minutely pubescent on both sides. Peduncles 4-6 inches long, (ex¬ 
clusive of the 10-14-flowered raceme.) Upper teeth of the calyx very short, and broadly tri¬ 
angular, with a minute point; all the teeth shorter than the tube. The stipules are larger than 
in the eastern plant, but much smaller than the leaves. We have not seen the pods. 
Lathyrus venosus, var. grandiflorus : caule nudo; foliolis (subdecum) minoribus supra 
glabris ; pedunculis folio subduplo longioribus ; floribus maximis, dentibus calycis tubo sub- 
sequalibus. Cocomungo, March 17. The flowers are twice as large as in the ordinary form of 
this species. 
Lathyrus venosus, var. d. Torr. & Gray , l. c. L. pubescens, Nutt. Mss. Hill-sides, 
Benicia; April 24. This agrees with our Oregon specimens from Nuttall. It is between L. 
venosus and vestitus, and seems almost to unite the two species. 
Lathyrus venosus: var. obovatus: caule nudo; foliolis sub-4-jugis plerumque obovatis obtusis 
puberulis ; racemo 3-4-floro ; calcycis dentibus subsequalibus. Near the Mammoth Grope and 
at Duffield’s Ranch, Sierra Nevada, May 15. A mountain form, with larger flowers than usual. 
Lathyrus ochroleucus, Hook. FI. Bor.-Am. 1, p. 159? Yar. pedunculis 12-20-floris, lolio 
submquantibus. Hill-sides, Murphy’s, May 12. Leaflets of a firm texture, and more approxi¬ 
mated than in the eastern plant. 
We are by no means satisfied with the results of our examination of the Lathyri in Dr. 
Bigelow’s collection. The species of this genus are extremely variable, especially those of 
Oregon and California. It is possible that the true L. venosus does not grow on the northwest 
coast; but we have not been able to discover characters sufficient for distinguishing from that 
species any of the varieties enumerated above. 
Lathyrus polymorphus, Nutt. Gen. 2 , p. 97; Gray, Pl. Fendl.,p. 30. Laguna Colorado, New 
Mexico, September; and Santa Domingo, October ; in low and wet places. 
Orobus littoralis, Gray, in Stevens’ Rep. ined. Astrophia littoralis, Nutt, in Torr. & Gray, 
FI. 1, p. 278. Specimens of this plant were given to Dr. Bigelow by Dr. Andrews. They 
were probably collected on the coast, near San Francisco. 
Phaseolus diversifolius, Pers.; Torr. & Gray, FI. 1, p. 279. Sand banks of the Canadian 
River, near the Shawnee villages, etc. August. 
Phaseolus pauciflorus, Benth.; Gray , PI. Wright. 1, p. 44. With the preceding. 
Amphicarp^a monoica, Torr. & Gray , FI. 1, p. 292. Ravines of Pecan creek ; August. 
Psoralea physodes, Dougl. in Hook. FI. Bor.-Amer. 1, p. 304; Torr. & Gray, FI. 1. p. 304 
and 689. Near Mark West’s Creek, California. April 30. The stem is wholly free from glands. 
Psoralea cuspid at a, Pursh, FI. 2, p. 741. Rocky hills of the upper Canadian; September. 
In fruit. 
Psoralea digitata, Nutt, in Torr. & Gray, FI. 1. p. 301. Sand-banks of the Canadian, 
near the Shawnee villages; August. In fruit. 
Psoralea linearifolia, Torr. & Gray, l. c. Gypsum hills, Comanche plains ; September. 
Psoralea micrantha (sp. nov.): cinereo-puberula, minute glanduloso-punctata; caulibus e rad ice 
seu rhizomate longissimo repente assurgentibus paniculato-ramosissimis ; stipulis subulatis 
minimis; foliis palmatim trifoliolatis ; foliolis lineari-filiformibus incisve anguste 1 inearibus 
mucronato-acutis ; pedunculis folio paullo brevioribus ; spica brevi densiflora ; bracteis minimis 
caducis ; calycis dentibus brevibus obtusissimis; fructu glabro.—Sand hills, near the last camp 
on the upper Canadian ; September. Plant a foot high, from a horizontal root or slender root- 
stock of several feet in length. Branches slender, leafy. Leaflets an inch or less in length, 
canaliculate and nearly filiform, or the lowest flat and about a line wide, punctate with fine 
brown dots. Peduncles half an inch long, about the length of the subtending petioles, bearing 
a short and oval or oblong spike of 10-20 small flowers, which are usually closely approximate 
or crowded. Calyx short, scarcely a line long, rather longer than the pedicel, campauulate, 
dotted with coarse brown glands ; the short teeth broad and very obtuse, equal. Corolla barely 
a line and a half long beyond the calyx, narrow, white, except the tip of the keel, which is blue. 
