PEA FAMILY 131 



Tribr VII. GLYCYRRHIZEAE. 



One genus. 38. Glycyrrhiza. 

 Tribe IX. HEDYSARIEAE. 



Leaves odd-pinnate, with several pairs of leaflets, without stipels. 



Pods 4— several-seeded, neither spiny nor dorsally toothed. 39. HEDYS.'VRtTM. 



Pods 1-2-seeded, more or less spiny or toothed. 40. Oxobrychis. 



Leaves 3-foUolate, with stipels. 41. Meiboml\. 



Tribe X. VICIEAE. 



Style flliform, hairy all around and below the ape.K; stamen- tube usually oblique at the 



summit. 42. Vici.\. 

 Style flattened towards the ape.K, hairy on the inner side; stamen-tube usually truncate 



or nearly so. 43. Lathyrus. 

 Tribe XI. PHASEOLEAE. 



Leaves 5-7-foliolate ; style glabrous. 44. Apios. 



Leaves 3-foliolate; style bearded along the inner side. 45. Strophostyles. 



1. SOPHORA L. 1. S. sericea. 



2. THERMOPSIS R. Br. Yellow Pea, Golden Pea, Pr.\irie Beax. 



Leprae erect or ascending. 

 Fruit straight. 



Legume strictly erect and anpressed to the peduncle, densely pubescent. 



Leaves strongly ascending; leaflets lance-oblong or oblanceolate ; stipules 

 lanceolate oi oblong, more than twice as long as broad; raceme dense. 



1. T. montana. 

 Leaves spreading; leaflets rhombic-elliptic to elliptic-oblong; lower stipules at 

 least ovate, verj oblique, less than twice as long as broad. 

 Raceme lax; legume straight. 2. T. ovata. 



Raceme dense; legume somewhat curved. 4. T. xylorrhiza. 



Legume ascending, sparingly pubescent; stipules broad; raceme few-flowered. 



3. T. pinetorum. 

 Fruit arcuate with spreading tips. 



Legume 4-6 cm. long. 4. T. xylorrhiza. 



Legume 8-10 cm. long. 5. T. divaricarpa. 



Legume strongly divaricate or reflexed; inflorescence short. 



Fruit mostly horizontal, merely arcuate. 6. T. arenosa. 



Fruit reflexed, curved into half a circle or more. 



Leaves glabrous above. 7. T. rhombifolia. 



Leaves silvery on both sides. 8. T. annulocarpa. 



3. LUPINUS (Tourn.) L. Lupine, Wolf's Bean, Blue Bonnet, 



Quaker Bonnet. 



Perennials with rootstocks; cotyledons petioled after germination. 

 Plant tall, 3 dm. liigh or more. 

 Stem with appressed hairs. 



Leaves glabrous above, at least in age. 

 Flowers large, over 12 mm. long. 



Stem rather low and stout, canescent-strigose ; leaflets broadly ob- 

 lanceolate. I. PLu\TTENSES. 

 Stem glabrous or almost so, tall; leaflets narrowly oblanceolate. 



X. Polyphylli. 

 Flowers small, less than 12 mm. long. II. Parvifix)RI. 



Leaves permanently pubescent above. 



Flowers yellow or ochroleucous. V. Sulphurei. 



Flowers blue, purple, or white. 



Calyx produced backwards into a distinct spur or sack. 



Spur of the calyx 2-3 mm. long. III. C.4.LCARATI. 



Spur of the calyx 1 mm. long or less. IV. Argophylli. 



Calyx merely gibbous at the base, not produced backwards. 



Plant green, usually not densely hairy; pubescence short, or if 

 longer, very sparse. 

 Keel moderately curved, lunate, the upper portion longer than 



the lower. VI. Albicaules. 



Keel strongly curved, the upper portion shorter than the lower. 



VII. FOLIOSI. 



Plant densely silvery or canescent with long hairs. 

 Stem leafy; pubescence of the leaves appressed. 



VIII. Ornatx. 

 Stem leafy at the base ordy, pubescence of the leaves longer and 

 looser. XIV. Lepidi. 



Stem with spreading pubescence. 



Leaflets glabrous above, at least in age; flowers large. 



Bracts Unear-subulate, long-attenuate, almost setaceous, much exceeding 



the flower-buds. IX. Cytisdides. 



Bracts lanceolate, scarcely exceeding the flower-buds. 



Stem tall, leafy tliroughout; leaflets narrowly oblanceolate, acute. 



X. POLYPHYLLI. 



stem low, stout, leafy mostly towards the base; leaflets broadly ob- 

 lanceolate or spatulate, mucronate. XI. Ajvixophili. 



