V2b LEGLMINOSiE. (PCLSE FAMILY.) 



8. LUPIN US, Tourn. Lupine. 



Calyx verv deeply 2-lipped. Sides of the standard reflexed ; keel scythe 

 shaped, pointed Sheath of the monadelphous stamens entire; anthers 

 alternately oblong and roundish. Pod oblong, flattened, often knotty by con- 

 strictions between the seeds. Cotyledons thick and fleshy. — Herbs, with 

 palmately 1 - 1 5-foliolate leaves, stipules adnate to base of the petiole, and 

 showy flowers in terminal racemes or spikes. (Name from Lupus, a wolf, 

 because these plants were tliought to devour the fertility of the soil.) 



1. L. perennis, L. (Wild Lupine.) Perennial, somewliat hairy; stem 

 erect (1-2'^); leaflets 7- 11, oblanceolate ; flowers in a long raceme, showy, 

 purplish-blue' (rarely pale) ; pods broad, very hairy, 5-6-seeded. — Sandy soil, 

 N. Eng. to Minn., Mo., and south to the Gulf. — Var. occidextalis, Watson, 

 has stems and petioles more villous. — Mich, and Wise. 



2. L. pusillus, Pursh. Annual, low, villous; leaflets usually 5 ; racemes 

 short, sessile; flowers purple or rose-color; pods oval, hirsute, 2-seeded. — 

 Central part of the Dakotas and Kan., and westward. 



9. TRIFOLIUM, Tourn. Clover. Trefoil. 



Calyx persistent, 5-cleft, tlie teeth hristle-form. Corolla mostly withering 

 or persistent ; the claws of all the petals, or of all except the ohlong or ovate 

 standard, more or less united below with the stamen-tube ; keel short and ob- 

 tuse. Tenth stamen more or less separate. Pods small and membranous, 

 often included in the calyx, 1 - 6-seeded, indehiscent, or opening by one of the 

 sutures. — Tufted or diffuse herbs. Leaves mostly palmately, sometimes pin- 

 nately 3-foliolate ; leaflets usually toothed. Stipules united with the petiole. 

 Flowers in heads or spikes. (Name from tres, three, and/o//«?«, a leaf.) 



* Flowers sessile in dense heads ; corolla purple or purplish, ivithering aicai/ after 



flowering, tubular below, the petals more or less coherent with each other. 



-t- Calyx-teeth silk ii -plumose, longer than the whitish corolla ; root annual. 



T. ARVENSE, L. (Rabbit-foot or Stone Clover.) Silky, branching 

 (5-10' high); leaflets oblanceolate; heads becoming very soft-silky and 

 grayish, oblong or cylindrical. — Old fields, etc. (Xat. from Eu.) 



-»- •(- Calyx scarcely hairy except a bearded ring in the throat, shorter than the rose- 

 purple elongated-tubular corolla. ( Short-lived perennials ; flowers sweet-scented.) 



T. pratexse, L. (Red C.) Stems ascending, somewhat hairy ; leaflets 

 oval or obovate, often notched at the end and marked on the upper side M'ith a 

 pale spot; stipules broad, bristle-pointed ; heads ovate, sessile. — Fields and 

 meadows; largely cultivated, (Adv. from Eu.) 



T. medium, L. (Zigzag C.) Stems zigzag, smoothish; leaflets oblong, 

 entire, and spotless; heads mostly stalked ; flowers deeper purple, otherwise too 

 like the last. — Dry hills, X. Scotia to E. Mass. (Adv. from Eu.) 



* * Flowers pedicelled in umbel-like round heads on a naked peduncle, their short 



pedicels reflexed when old; corolla white or rose-color, withering-persistent 



and turning brownish in fading ; the tubular portion short. 



1. T. reflexum, L. (Buffalo C.) Anniml or hiennial; stems ascending, 



downy ; leaflets obovateoblong, finely toothed ; stipules thin, ovate ; standard 



rose-red, wings and keel whitish ; calyx-teeth hairy ; pods 3 - 5-seeded — 



Western N. Y. and ( )nt. to Iowa, Kan., and southward. 



