84 LEGUMINOSJE. 



1. SILIQUASTRUM, Tourn. (RED BUD). Shrubs with simple leaves; 

 the flowers in axillary fascicles, appearing in spring before the leaves. 

 Calyx campanulate, with 5 broad obtuse teeth. Petals 5, the banner 

 small, enfolded by the wings : keel-petals distinct, larger than the wings. 

 Stamens 10, distinct. Pod thin, flat, oblong, wing-margined -along the 

 upper suture. 



1. S. occidentale (Torr.). Widely branching, 620 ft. high: leaves 

 round-cordate, entire, obtuse or emarginate, 2 in. brqad, on petioles of 



1 in. or less: fl. J in. long, rose-purple: pod 2 in. long, % in. broad, acute 

 at each end. From near Sufiol, Behr, northward. April. 



2. VICIA, Varro (VETCH). Weak herbs with angular stems, climb- 

 ing by tendrils which terminate the pinnate leaves. Peduncles axillary, 

 1 oo -flowered. Calyx 5-cleft or -toothed, the upper teeth shorter. 

 Stamens diadelphous (9 and 1). Style filiform, bent upward at apex and 

 villous all around, under the stigma, or else on the outside only. Pod 

 oblong, several-seeded. 



* Racemose-flowered perennials. 



1. V. gigantea, Hook. Stout, 5 10 ft. high: leaflets 10 13 pairs, 

 linear-oblong, obtuse, mucronulate, 1 2 in. long; stipules 1 in., semi- 

 sagittate, toothed at base; peduncles much shorter than the leaves; the 

 dense raceme 1-sided, 5 18-flowered; fl. dull red: pod glaucous, black 

 when ripe. Common along streams. May, June. 



2. V. Americana, Muhl. Weak, 2 5 ft. high, climbing by branched 

 tendrils, nearly glabrous : leaflets 46 pairs, thin-membranaceous, vivid 

 green above, paler beneath, closely but delicately feather-veined, elliptic- 

 lanceolate, entire, obtuse, mucronulate, 1 in. long: peduncles shorter 

 than the leaves, 3 8 flowered: fl. % in. long, bright purple: upper 

 calyx- teeth very short, lower well elongated: pods 1 in. long, glabrous. 

 Var. truncata, Brewer. Lower and stouter than the type; leaflets 

 linear to oblong-linear, usually dentate or even serrate toward the 

 truncate apex: fl. larger and paler. Var, linear is, Wats. Leaflets 

 firmer in texture, narrowly linear, the veinlets confluent along the 

 margin. Common and variable. 



* * Few-flowered annuals. 



3. V. exigua, Nutt. Slender, 12 ft. high: leaflets 4 or 6, oblong- 

 linear, obtuse: peduncles filiform, shorter than the leaves, 1 2- flowered: 

 calyx-teeth lanceolate from a broad base: corolla white or purplish, 



2 lines long: pod glabrous, 4 5-seeded. Hillsides or plains, preferring 

 stony or sandy soil. March May. 



4. V. Hassei, Wats. Taller and less delicate than the last, the 

 leaflets ampler, more numerous, deeply notched at apex: fl. 3 lines long: 



