LupiNUS. LEGUMINOSiE. 379 



narrowly lanceolate, densely sericeous on both sides, shorter than tlie petiole; 

 stipules subulate, short ; flowers soniewlial vertieillale in a dense thick ra- 

 ceme ; calyx ebractcolate ; keel glabrous. Agardh. — Uvok.Ji. Bor.-Am. \. 

 p. 166; Agardh! I. c. 



On the Blue Mountains of Oregon, and near the source of Clarke's River, 

 Douglas! (v. sj). in herb. Lindl.) — This is said to resemble tlic foregoing, but 

 is a much slenderer and smaller [jlant, the leaflets (whitish) narrower and 

 more numerous, the flowers sin:dler and of a pale sulphur-color. Calyx 

 very silky. 



33. L. scriceus (Pursh) : silky-villous ; leaflets 7-9, lanceolate, narrowed 

 at the base, rather longer than the jjetiole ; stipules minute, setaceous ; flow- 

 ers somewhat vertieillatc in an elongated raceme ; bracts about the length of 

 the flower-buds; calyx bracteolale ; corolla glabrous. Anardh. — Pursh. fl. 

 2. p. 468 ; DC. I. c. ; Hoolc.Jl. Bor.-Am. l.p. 164 ; Agardh ! I. c.f. 31 ; 

 Nutt.! in jour. acad. Ph'dad. 7. p. 17 ; Hook. S^'Arn. hot. Beechey, p. 138.? 

 L. Chamissonis, Esch. in mem. acad. St. Petersb. I. c. 6c in Linneea, 3. p. 

 151 ? 



Banks of the Kooskoosky River, Lewis. Oregon? Douglas! On the 

 Flat-Head River and in the Rocky Mountains, Nuttall! Also in California? 

 — Corolla rose-color or pale purple, according to Pursh ; blue, according to 

 Nuttall. — Fischer and Meyer remark that tlie L. sericeus of Esclischollic is 

 the same with their L. arboreus j3. odoratissimus, w^hich is probal)ly L. rivu- 

 laris ; while they refer the L. sericeus of Hooker and Arnott to L. Chamis- 

 sonis, Esch. We have not the means of ascertaining by comparison whether 

 the Californian species has been correctly referred to L. sericeus of Pursh. 



34. L. c(SspUosus (Nutt. ! rass.) : " dwarf, nearly stemless, silky-hirsute ; 

 leaflets 5-7, oblong-lanceolate, attenuate at the base, much shorter than the 

 petiole ; spike sessile, densely-flowered, much shorter than the leaves ; bracts 

 setaceous, deciduous ; calyx bracteolate, the upper lip 2-parted, the lower 

 obscurely 3-toothed ; legume villous, 3-4-seeded. 



" In the grassy vallies of the Rocky Mountains, on the Sweet Water of the 

 'Platte and the Colorado of the West. — Plant 3-4 inches high, forming small 

 cfcspitose tufts. Stipules adnate, subulate. Flowers small, nearly sessile, 

 pale blue. Nuttall:'— PdVicA to L. aridus, Dougl., but the flowers are small- 

 er, the keel naked, &c. It also resembles L. pusillus. 



35. L. aridus (Dougl.) : very silky-hirsute with fulvous hairs ; stem low, 

 much branched from the base ; leaflets 7, oblong-lanceolate, about one-third 

 the length of the petiole ; flowers in a conical very dense spike ; bracts subu- 

 late, rather persistent, shorter than the bracteolate calyx ; vexillum glabrous ; 

 keel lanuginous-ciliate ; legumes villous. Agardh. — Dougl. ! in hot. reg. t. 

 1242 ; Hook. I. c. ; Agardh! I. c. p. 31. 



Dry sandy deserts of the Oregon, from the Great Falls to the sources of 

 the Missouri, Douglas ! (v. sp. in herb. Lindl.) — Stem scarcely a foot high. 

 Stipules subulate. Flowers irregularly verticillate, on short pedicels, rose- 

 color. Upper lip of the calyx 2-cleft, the lower entire. Corolla about one- 

 third longer than the calyx. Agardh. 



36. L. leucopkyllus (Lindl.) : densely villous with a fulvous silky tomen- 

 tum ; stem elongated ; leaflets 7-9, linear-lanceolate or lanceolate-oblong, 

 acuminate, shorter than the petiole ; flowers crowded in an elongated very 

 dense subsessile spike ; bracts somewhat persistent, shorter than the expand- 

 ed subsessile flowers ; calvx bracteolate ; vexillun-i silky-pubescent external- 

 ly ; legumes densely villous, 4-5-seeded.— Z-i«c^/. .' bot. reg. t. 1124 ; Hook. 

 I.e.; Agardh! I. c. p. 31. L. densiflorus, Nutt. mss. (ex descr.) not of 

 Benth. 



