PEA FAMILY 389 



Calaveras Big Trees, Bigelow, and Duffield ranch, Tuolumne Co., Bigelow, in part. Vicia nana 

 Kell. Proc. Cal. Aead. 7 :89 (1876), type loc. Granite Mt., Oak Creek, Kern Co., Brannan. L. obo- 

 vatus White, Bull. Torr. Club 21:455 (1894). L. nuttallii Wats. I.e. 21:450 (1886), type loc. 

 "upper California" [Columbia Eiver], Nuttall. L. nevadensis subsp. stipulaceus Bradshaw, Bot. 

 Gaz. 80:244 (1925) ; stipules larger, % to % size of the leaflets ; racemes as much as 10-flowered. — 

 British Columbia to California (Eldorado Co.). L. obovatus var. stipulaceus White, Bull. Torr. 

 Club 21:455 (1894), type loc. between Colville and Spokane, Wash., Wilkes Exp. no. 592. 



4. L. rigidus White. Modoc Pea. Steins many from the heavy crown of a 

 stout taproot, slender, angled, erect or ascending, forming a thick tuft 6 to 10 

 inches high; herbage glabrous and somewhat glaucous; stipules narrow; leaves 

 coriaceous, 1 to 2^/2 inches long; leaflets 4 to 10, oblong-oblanceolate, cuspidate, 7 

 to 11 lines long; tendrils reduced or none; peduncles exceeding the leaves; racemes 

 2 to 5-flowered; corolla white, 8 to 11 lines long. 



Valleys, 2500 to 4000 feet : northeastern Modoc Co. North to eastern Oregon. 

 May-July. 



Locs. — Goose Lake, Amtin 4r Bruce 2220; Fort Bidwell, Manning 19. Se. Ore.: Pine Creek, 

 B. M. Austin. 



Refs.— Lathyrus rigidus White, Bull. Torr. Club 21:455 (1894) ; Jepson, Man. 584 (1925). 

 L. albus Wats. Bot. Cal. 2:442 (1880), type loc. Surprise Valley, Modoc Co., Lemmon; not L. 

 albusGarcke (1849). 



5. L. lanszwertii Kell. var, aridus Jepson comb. n. Mountain Pea. Stems 

 erect or climbing, 1 to l^/^ feet high, usually not branching; herbage puberulent; 

 rachis of leaves 2 to 3 inches long; leaflets 6 to 12, firm, linear-lanceolate, I/2 to 1% 

 lines wide, 1 to 21/4 inches long; tendrils simple or branched; stipules narrow, 

 lanceolate or falciform, 2 to 5 lines long; peduncles not exceeding rachis, usually 

 much shorter, 2 to 7-flowered (in ours) ; calyx-teeth unequal, shorter than the tube; 

 corolla 4 to 8 lines long; keel and wings white, the banner pink with a fine mesh of 

 darker veins; pods glabrous, 1^/4 to 1% inches long. 



Openly wooded mountain slopes, 3500 to 6500 feet : Sierra Nevada from Mari- 

 posa Co. to Modoc Co. North to Oregon. June-July. 



Locs. — Hodgdon Ranch, near Tuolumne Big Trees, Jepson 10,558 ; Strawberry sta., Tuolumne 

 Co., A. L. Grant 93; Fallen Leaf Lake, Placer Co., M. S. BaTcer; Fall River Mts., se. Modoc Co., 

 M. S. Baker. 



Tax. note. — Specimens from the region between Washoe and Franktown, Nevada (Heller 

 10,594) have been taken as representative of L. lanszwertii Kell. If this be a proper reference, 

 as seems probable, then we regard these plants with broad leaflets and with somewhat crowded 

 racemes as more or less distinct from the plants of the Sierra Nevada with narrow leaflets. Part 

 of this Sierran form with narrow leaflets Bradshaw (Bot. Gaz. 80:246) calls L. lanszwertii, part 

 L. lanszwertii subsp. aridus (I.e. 80:247). The latter he characterizes as having 2 to 4-flowered 

 racemes and smaller flowers (usually about 5 lines long), characters which fall within the range 

 of characters of his typical L. lanszwertii. Austin 29 (Quincy, Plumas Co.) is cited by Bradshaw 

 as L. lanszwertii (Bot. Gaz. 80:247). The two individuals on the sheet have both few-flowered 

 racemes but differ a little in flower size, one answering to L. lanszwertii Bradshaw, and the other to 

 the subsp. aridus Bradshaw. They are, however, apparently quite alike in all other features, and 

 this slight range in flower size (which is admitted for his species) does not seem to be very im- 

 portant for distinguishing a subspecies. Other spms. cited by Bradshaw as subsp. aridus do not 

 have "minute tendrils" but rather large or even branched ones. The whole of this narrow-leaved 

 group of the Sierra Nevada and northward with non-glabrous herbage we regard as one form 

 and as distinct, at least varietally, from the true L. lanszwertii Kell. of western Nevada. L. 

 graminifolius White (Bull. Torr. Club 21:454,-1894) of Arizona, New Mexico and Mexico, 

 differs slightly from var. aridus in glabrous or more nearly glabrous herbage and in having on 

 the average longer peduncles (L. palustris var. graminifolius Wats. Proc. Am. Acad. 23:263, — 

 1888, "New Mexico to Arizona and northern Mexico"; Sonora, Mex., Ihurber 1016). 



Var. brownii Jepson comb. n. Herbage glabrous ; leaflets usually 2 to 6, linear to linear- 

 lanceolate, 1 to 3% inches long; tendrils sometimes obsolete; raceme 1 to 4-flowered. — Mendocino 

 Co. to Siskiyou Co. ; Lassen Co. to Nevada Co. ; Kern Co. North to Oregon. Resemblance between 

 this variety and L. pauciflorus Fer. is not obvious. Stipules, calyx-teeth and the abruptly up- 

 flexed keel are all more reminiscent of L. lanszwertii var. aridus. 



