LEGUMINOSAE (PICA FAMILY) 



293 



CaJyx distended or split by the tucgid included pod. 

 Corolla violet-blue; the wings oblong . 

 Corolla purple; the wings dilated and emarginate , 

 Pod at length evidently exceeding the calyx. 

 Calyx somewhat bladdery-inflated , . . ■ 

 Calyx not inflated. 



Pod bladdery-inflated, membranous . . . 

 Fod not bladdery-inflated, often turgid or coriaGeous. 

 Flowers 1-3 . . ..... 



Flowers several or many. 



Plants somewhat glandulap-viscid. 



Leaflets 17-31 



Leaflets 25-55 



Plants neither glandular nor viscid. 

 Leaves sindply pinnate. 

 Fod nearly S^celled. 

 Flowers yellow or yellowish . . 

 Flowers purple or ochroleucoug . , 

 Fod half 2-celled or less. 

 Flowers purple or violet. 



Fod submembtanous ... 

 Fod coriaceous , . , , 

 Flowers white or yellowish. 

 Dwarf alpine plants .... 

 Stout and tufted. 

 Corolla yellowish throughout . 

 Corolla white or yellowish; the keel always 

 purple-tipped . . . 

 Leaflets very numerous and subverticillate 



4. A, lagopus. 

 6. A. nanus. 



6. A. Blankinshipii. 



7. A. podocarpus. 



8. A. Parryi. 



0. A. viscidulus. 

 10. A. viscidus. 



11. A. gracilis. 



12. A, dispar. 



13. A*, monticola. 



14. A, Lambertii. 



15. A. alpicola. 



16. A. villosus. 



17. A. albiflorus. 

 . 18. A. Kichardsonii. 



1. AragaUus deflexus (DC.) Heller, Cat. N. A. PI. 4^ 1898. ' Loosely silky- 

 pubescent; leafy-stemmed or more rarely depauperate and nearly stemless; 

 taller forms over 3 dm. high: leaflets crowded in 12-16 pairs, lanceolate 

 to oblong, 6-12 mm. long; stipules free: peduncles much surpassing the leaves; 

 flowers rather small (about 6 nmn. long), in a short and close or in fruit 

 lengthened and open spike: pod oblong-lanceolate, not stipitate, 1-celled, 

 much surpassing the calyx. — In the mountains from British America to 

 southern Colorado and westward to Utah. Subalpine forms are often depau- 

 perate and almost stemless [A. foliolosid (Hook.)- Rydb.]. 



2. Aragallus multiceps (Nutt.) Heller, 1. c. ' Canescently silky; matted 

 caespitose, subcaulescent, 3-7 cm. high: leaflets 7-9: peduncles, weak, 1-2- 

 flowered; flowers pvuple: pod stipitate, wholly_ inclosed in the bladdery, ovate- 

 globose calyx, turgid, ovate, 1-celled. — Granite soils, middle altitudes; Wy- 

 oming and Colorado. 



2a. Aragallus multiceps mi^or (Gray) A.'Nels. Erythea 7: 67. 1899. 

 Pulyinate or depressed caespitose: leaflets very small: fruiting calyx much 

 reduced.— Subalpine gravelly barrens. 



3. Aragallus colUnus A. Nelsi Erythea 7: 57. 1899. Canescently appressed- 

 pubescent and, silky-villous; crown woody, covered ^th the persistent peti- 

 oles: leaves and scapes tufted on the crowns: scapes 1-2 dm. long, exceed- 

 ing the leaves: leaflets 7-13, oblong to linear-lanceolate, acute, 10-30 mm. 

 long: spike 10-20-flowered; bracts leaf-like, greenish, equaling the calyx, 

 or nearly so: calyx inflated in fruit, globose-urceolate: corolla white or 

 yellowish, the standard streaked with purple, twice as long a? the calyx: 

 pod turgid, nearly filling the calyx; style abruptly flexed near its apex and 

 protruding from the narrowed mouth of the calyx. — ^Northern Wyoming and 

 Montana. 



4. Aragallus la^opus (Nutt.) Greene, Pitt. 3: 212. 1897. Canescently 

 silkjr, with loose villous hairs; nearly stemless and rather dwarf: scaipes, sur- 

 passing the leaves, 5-6-flowered: leaflets 9-13, lanceolate or oblong, 6-8 mm. 

 long: flowers bright violet: calyx cylindrical, silkjj: pod ovate, thin mem- 

 branaceous and almost bladdery, obtuse, abruptly tipped with the. persistent 

 fctyle, slightly i)rotruding from the calyx which splits down one side. — ^Moun- 

 tains of Wyoming and Montana. 



5. Aragallus nanus (Nutt.) Greene, 1. c. Silvery with appressed silky 

 pubescence: leaflets 3 or 4 or rarely 6 pairs, narrowly lanceolate: flowers 

 purple or whitish: pod turgid, oblong, somewhat coriaceous, the acuminate 



