LEGUMINOS^ 349 



K. Pseudacd,cia, Linn. Common black locust. Tree, native West and 

 Soutli, everj'wliere introduced and valuable for timber. Bark nearly black, 

 very rough: stiff spines at base of each leaf: leaflets 9-19, ovate or oval, 

 somewhat mucronate at tip, on short stalks: racemes 3-5 in. long, from 

 axils, pendulous, slender and loose, the flowers white, very fragrant: pod 

 smooth, 4-7-seeded. 



R. viscdsa, Vent. Small tree, native to southern states: cultivated: leaf- 

 stalks, branchlets and pods grandular-viscid (clammy): prickles short: 

 flowers roseate, in dense, erect racemes. April to June. 



R. hispida Linn. Bose acacia. A straggling shrub, to 10 ft.: branches, 

 stalks, and pods bristly with flexible red spines: flowers pink, handsome, in 

 loose pendulous racemes. Native of southern mountains. Cultivated. May 

 to June. 



3. GLEDlTSCHIA. Honey Locust. 



Trees, thorny with stout branching spines on branches and usually on 

 trunk: leaves abruptly pinnate, frequently bi-pinnate, and all gradations 

 often on same leaf: flowers in axillary, spicate racemes, greenish, inconspicu- 

 ous, some imperfect, not papilionaceous: calyx-tube short, 3-5 cleft: petals 

 3-5, nearly equal, inserted on calyx-tube: stamens 3-10, distinct, inserted on 

 petals: fruit a large, leathery, flat pod, elongated, containing 1-many seeds. 



G. triacdnthos, Linn. Large tree with hard and heavy wood: pods, 6-18 

 in. long, an inch or so wide, twisted or hoop-like, filled with sweetish pulp 

 between the several- to many-smooth, shiny seeds. 



4. CfiRCIS. Redbitd. 



Small trees with simple, rounded, heart-shaped leaves and tiny stipules 

 soon falling: flowers roseate-purple, in numerous small clusters along 

 branches, even on trunk, before leaves, thus giving the tree a striking 

 appearance: calyx 5-toothed, canipanulate: corolla irregular, not papil o- 

 naceous; petals 5 and standard enclosed by wings: stamens 10, distinct: 

 legume oblong, flat, many-seeded, margined on one edge. 



C. Canadensis, Linn. Bedbud. Judas tree. Native small tree of Middle 

 and Southern states, 10-30 ft. high, irregularly branching: bark smooth and 

 dark. Cultivated as ornamental tree, April, May. 



5. PlSUM. Pea. 



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

 leaves pinnate, with 1-3 pairs of foliar leaflets, and very large, leafy 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 2 pairs, broad-oval: peduncles 2- or more-flowered. Old 

 World. 



6. LATHYRUS. Vetchling. 



Much like Pisum, differing chiefly in very technical characters, but best 

 told in general by the narrow leaflets and pods, and not leafy calyx. 



