PEA FAMILY 281 



45. L. luteolus Kell. Butter Lupine. Stem 1 to 2 feet high, branched above; 

 herbage pubescent or puberulent, the stems glabrous below; leaflets usually 7, (I/2 

 or) % to 1^/4 inches long; racemes crowded, 2 to 9 inches long, the whorls definite; 

 flowers 6 to 7 lines long; calyx-tube subsaccate beneath the upper lip; upper lip 

 entire or bifid, I/2 length of the lower lip; lower lip lanceolate, entire or toothed; 

 petals light 3'ellow; banner ovate; wings ciliate near the claw; keel densely ciliate 

 on both margins; pods hirsute, 2-seeded. 



Moist banks, dry adobe slopes or gravelly washes, 500 to 4000 feet : inner or 

 middle Coast Ranges (inside the Redwood belt) from San Benito Co. to Mendocino 

 and Siskiyou Cos.; also outside the Redwood belt at Cape Mendocino. North to 

 southern Oregon. June-July. 



Habit note. — The plant, commonly l^/^ to 2 feet tall, is typically widely branching, with hori- 

 zontally spreading branches bearing erect racemes. The raceme terminating the main axis flowers 

 first and goes on early into the fruiting stage, tlie racemes on the lateral branches next flowering 

 in succession outward. The plants become, thus, 2 to 3 feet broad. Colonies with yellow flowers 

 sometimes show variations to white and to light blue (betw. Houghs Sprs. and Bartlett Sprs., 

 K. Brandegce). The leaflets are often glabrous above in northern plants (Humboldt and Sis- 

 kiyou Cos.). 



Locs. — Upper San Benito River, Inez Bay Smith 715; Walnut Creek, Maynard; Kelseyville, 

 Jepson 13,641; Mt. Sanhedrin, Furpus 1132; Cahto, Mendocino Co., Eastwood; Rancheria Creek, 

 Mendocino Co., Bolander 6512 ; Capeto^vn, Humboldt Co., Jepson 2142 ; Buck Mt., Humboldt Co., 

 Tracy 2696 ; Kneeland Prairie, Humboldt Co., Tracy 3871 ; Middle Creek sta., Shasta Co., Eeller 

 7951 ; Yreka, Butler 1447, 910. 



Eefs. — LupiNUS LUTEOLUS Kell. Proc. Cal. Acad. 5:38 (1873), tvpe loc. "Senal" (probably 

 Usal), Mendocino Co.; Jepson, Fl. W. Mid. Cal. 318 (1901), ed. 2, 219 (1911), Man. 521 (1925). 

 L. bridgesii Gray; Wats., Proc. Am. Acad. 8:538 (1873), type. Bridges 55; type loc. stated as 

 "Sacramento Valley", but doubtless Coast Ranges. 



46. L. shockleyi Wats. Desert Lupine. Plants 2 to 5 inches high, the stems 

 few to many from the base and very short ; stems and petioles densely villous, the 

 leaflets almost white-silky beneath (especially when young), above bright green 

 and glabrous, except the very margins; leaflets 7 to 10, narrowly obovate, obtuse, 

 6 to 10 lines long; flowers not in whorls, the racemes shorter than the leaves, % to 

 ] % inches long; flowers II/2 to 2 lines long; pedicels often curv^ed, I/2 as long as the 

 flowers; calyx-lips subequal, the lower one minutely 3-toothed at apex, the upper 

 2-parted into lanceolate lobes; corolla dark purple, or rarely pink; banner ovate 

 to obovate; pods broadly ovate, minutely and densely scaly on the sides, hairy on 

 the margin, 6 to 7 (or 9) lines long; seeds flatfish, clay-color, irregularly lineate or 

 vermiform-wrinkled. 



Sandy flats and washes, 500 to 4000 feet: west side of the Colorado Desert; 

 Mohave Desert and its bordering foothills or mountains. East to Nevada and Ari- 

 zona. Apr.-May. 



Locs. — Borrego Sprs., T. Brandegee ; Whitewater, Jepson 11,630; Hesperia, Parish; Bar- 

 stow; Yermo sta., K. Brandegee ; Tehachapi, -S^. Brandegee; Granite Wash, Parish 10,075; Kelso, 

 K. Brandegee. 



Refs. — LrpiNUS shockleyi Wats. Proc. Am. Acad. 22 : 470 (1887), type loc. "Mohave Desert, 

 San Bernardino Co.", Parish Bros., May, 1882; also near Soda Spr., Esmeralda Co., Nev., /S/iOcfc- 

 Zei/; Jepson, Man. 520 (1925). 



47. L. odoratus Hel. Mohave Lupine. Stem very short or shortly branched 

 (1/4 to 1% inches long), producing few to many ascending or erect peduncles and 

 long-petioled leaves and thus forming a plant 4 to 12 inches high; herbage glabrous 

 or sparsely villous; leaflets 7 to 9, obovate, attenuate at base, obtuse or subacute at 

 apex, 14 to 1 inch long; petioles II/2 to 4 inches long; peduncles mostly equaling or 

 exceeding the leaves; racemes dense or loose, 2 to 6 inches long; flowers 4 to 5 lines 

 long; pedicels 1 to 3 lines long; bracts persistent; upper calyx-lip about as broad as 

 long, 1 line long, entire or notched; the lower about twice as long, entire or ob- 

 scurely 3-toothed; petals blue or purple, the banner with a yellow center; keel a 



