LEGUMINOSaj 311 







A. Shrill), twining 1. Wistaria 



aa. Herbs. 



b. Plant climbing by tendrils. 



c. Calyx leafy Lobed _'. Pisum 



cc. < 'alyx not leafy lobed :;. Lathyrus 



bb. Plant not tendril-bearing. 



c. Leaves digitate, of 3 leaflets 4. Trifolium 



cc. Leaves pinnate (terminal one-stalked, and the -talk 

 jointed I, of 3 leaflets. 



d. Flowers small, in very slender racemes 5. Melilotus 



dd. Flowers small to medium, in heads or short spikes. 6. Medicago 

 ddd. Flowers medium to lar^e, clustered at the joints of 

 raceme. 



e. Keel of corolla coiled into a spiral 7. Phasi 



f.e. Keel curved but not coiled 8. Vigna 



1. WISTARIA. 



Tall shrubby twiner, producing long, dense racemes of show] flowers: 

 leaves pinnate, with several or many leaflets: 2 upper calyx-teeth Bhorter: 

 standard large and roundish: pod knotty, several-seeded. 



W. Chinensis, DC. Wistaria. Popular climber for porches, from 

 China, with large drooping racemes of bright blue (sometimes white) pea 

 like flowers in Bpring and summer. 



2. PlSUM. Pea. 



Slender herbs, climbing by tendrils which are homologous with leaflets: 

 leaves pinnate, with 1-3 pairs of foliar leaflets, and very large leaf] stipules: 

 lobes of calyx leafy: flowers large, white or pink, on axillary peduncles: 

 pod a typical legume, several seeded. 



P. sativum, Linn. Garden pea. Figs. 190,284. Smooth and glaucous : 

 leaflets usually J pairs, broad-oval: peduncles 2 or more-flowered. <M 

 World. 



::. LATHYRUS. Vi r< HUNG. 



Much like Pisum, differing chiefly In very technical characters, bul 

 told in genera] by the narrow leaflets and pods, and nol leaf] calyx. 



L. odoratus, Linn. Sweet /"". Pigs. 105, l"_"J. Annual, the stem I 

 li afleta one pair, narrow oval or oblong: flowers 2 or '' on a long peduncle, 

 \cr\ fragrant, In many colors. Southern Europe. 



L. latifolius, Linn. Everlasting /" a . Pig, 246. Perennial of long 

 duration, smooth, the Btems winged; leaflets one pair, long-oval: flov 

 man] In b dense cluster on long peduncles, rose purple and white, i 



I. TRIFOLIUM. < 'i, : ,.k. 



Annual or perennial herbs with digitate ha II :: leafli 



joined directly to top of petiole): flowers -mall, with bi dyj 



teeth, In dense load-. fruit a l to I ed hub pod which due* nl 



exce e d : 1 1 e c al yx . 



