390 LEQUMINOSAE 



Locs. — Potter Valley, Mendocino Co., Purpus; Trinity River near South Fork, Tracy 7432; 

 Hayfork, Trinity Co., Blasdale ; Greenhorn Mt., e. Siskiyou Co., Butler 1346; Black Butte, near 

 Mt. Shasta, IleUer 14,378; Goose Valley, Modoc Co., M. S. Baker; Susanville, T. Brandegee ; 

 Nevada Co. (Bot. Gaz. 80:251) ; Tehachapi Mts. (Bot. Gaz. 80:251). 



Kefs. — Lathyrus lanszwertii Kell. Proc. Cal. Acad. 2:150 (1863), type loc. Washoe, Nev., 

 Lanszxoeert. Var. aridus Jepson. L. lanszwcrtii subsp. aridus Bradahaw, Bot. Gaz. 80:247 

 (1925). L. coriacens subsp. aridus Piper, Proc. Biol. Soc. Wash. 31:190 (1918), type loc. Black 

 Butte, Crook Co., Ore., Cusick 2814. L. oregoncnsis White, Bull. Torr. Club 21 :45G (1894), type 

 from Ore., Cusick 1372. L. goldsteinac Eastw. Bull. Torr. Club 32:197 (1905), type loc. Lakeside 

 Park, Lake Tahoe, Luiie Goldstein. L. graminifolins Jepson, Man. 584 (1925) in part, not White. 

 Var. BROWNii Jepson. L. hrownii Eastw. Bull. Torr. Club 30:491 (1903), type loc. n. side Mt. 

 Shasta, H. E. Brotvn 391. L. pauciflorus subsp. hrownii Piper, Proc. Biol. Soc. Wash. 31:195 

 (1918), L. graminif alius Jepson, Man. 584 (1925) in part, mot White. 



6. L. splendens Kell. Campo Pea. Stems climbing bushes 2 to 4 feet high, 

 angled; herbage minutely pubescent or subglabrous; leaflets about 8, linear to ellip- 

 tic-ovate, very variable (even on one individual), 10 to 14 lines long; stipules vari- 

 able; racemes 4 to many-flowered; corolla deep red, changing to dark purple, finally 

 sordid, 1 to li/4 inches long. 



Valley flats and mountain slopes, 50 to 3350 feet: San Diego Co. South to 

 Lower California. Apr. 



Note on variation. — The two forms, Lathyrus splendens Kell. and L. laetiflorus var. alefeldii 

 Jepson, are apparecitly closely related. The red-flowered phase of this latter form is not uncom- 

 mon and it also exhibits at times the extreme deflexing of the banner which is characteristic of 

 L. splendens. 



Locs. — Pauma Wash, Pala Mission, Jepson 8489 ; Mt. Soledad, w. San Diego, Newlon 285 ; 

 La Jolla, Jepson 11,869; Mesa Grande, i'. Ferguson 15; Buckman Sprs., Parish 9085. 



Eefs. — Lathyeus splendens Kell. Proc. Cal. Acad. 7:90 (1876), type from S. Cal., J. M. 

 Eutchings; Jepson, Man. 584 (1925). L. vestitus Wats.; B. & W. Bot. Cal. 2:442 (1880) ; not 

 Nutt. (1838). 



7. L. laetiflorus Greene. Canon Pea. Stems stout, climbing, several feet 

 long; herbage pubescent or glabrous; stipules usually small (2 to 5 lines long); 

 leaflets firm, venulose, elliptic-oblong to linear or ovate, ^/^ to 2i/2 inches long; 

 tendrils well developed, branched; peduncles stoutish, exceeding the leaves; ra- 

 cemes lax, 5 to 12-flowered; flowers 9 to 11 lines long; calyx-teeth unequal, sepa- 

 rated by wide sinuses, the lateral subulate or linear-lanceolate, the lower linear, 

 usually shorter than the tube, sometimes as long; corolla rose-pink or flesh color, 

 or whitish with red, purple or lavender veinlets; pods slightly pubescent; seeds 

 4 to 8. 



Foothill mesas and mountains, 2000 to 5500 feet : San Gabriel and San Bernar- 

 dino mountains to San Diego Co. South to Lower California. Mar.-June. 



Geog. note. — The two groups, Lathyrus bolanderi Wats, and L. laetiflorus Greene, have been 

 somewhat indefinitely distinguished. Typically, the southern California group, L. laetiflorus, 

 has lanceolate-subulate lateral calyx -teeth with wide sinuses between these and the very narrow 

 lower tooth. Although in the type specimen the calyx-teeth are longer than the tube, they are 

 usually shorter. The flowers average larger than in northern California plants, the racemes are 

 usually fewer flowered and lax, with much elongated peduncles. This divergence culminates in 

 the variety alefeldii, which is farthest removed geographically from the northern plants. The 

 central and northern California group, L. bolanderi and the more pubescent variety violaceus, 

 have typically lanceolate-oblong lateral calyx-teeth with a narrow U to V-shaped sinus between 

 these and the lower tooth which is usually broader than in the Southern California forms. The 

 calyx-teeth are usually longer than the tube, nearly always at least equal to it. The flowers average 

 smaller than in the L. laetiflorus group. The racemes in L. bolanderi are in general denser with 

 more numerous flowers and with the peduncles less elongated. Plants from Monterey, San Luis 

 Obispo and Santa Barbara counties show a much less typical condition and occasionally a plant 

 with the characteristic calyx of L. laetiflorus occurs. The ranges of the two groups overlap in 

 this region and the racial strains perhaps hybridize. We cite stations for L. laetiflorus as below. 



Locs. — Tujunga Caiion, San Gabriel Mts., Peirson 2137 (leaflets narrow) ; Arroyo Seco, San 

 Gabriel Mts., Peirson 104; Pacoima Canon, San Gabriel Mts., Peirson 374; Claremont, C. F. 

 Baker 4186; Santa Cataltna Isl., K. Brandegee ; San Bernardino, Parish; Strawberry Valley, 



