144 LEGUMINOS.E. (PULSE FAMILT.) 



united. Stamens 10, distinct, declined. Pod oblong, flat, many-seeded, the 

 upper suture with a winged margin. Embryo straight. — Trees, with rounded- 

 heart-shaped simple leaves, caducous stipules, and red-purple flowers in umbel- 

 like clusters along the branches of the last or preceding years, appearing before 

 the leaves, acid to the taste. (The ancient name of the Oriental Judas-tree.) 



1. C. Canadensis, L. (Red-bud.) Leaves pointed ; pods nearly sessile 

 above the calyx. — Rich soil, New York to Ohio, Illinois, and southward. 

 March - May. — A small ornamental tree, often cultivated : the blossoms smaller 

 than in the European species. 



34. CASSIA, L. Senna. 



Sepals 5, scarcely united. Petals 5, unequal, not papilionaceous, spreading. 

 Stamens 5-10, unequal, and some of them often imperfect, spreading: anthers 

 opening by 2 pores or chinks at the ap*ex. Pod many-seeded, often with cross 

 partitions. — Herbs (in the United States), with simply and abruptly pinnate 

 leaves, and mostly yellow flowers. (An ancient name of obscure derivation.) 



* Leaflets large : stipules deciduous : the 3 upper anthers deformed and imperfect : 



flowers in short axillary racemes, the. upper ones panicled : herbage glabrous. 



1. C. Marilandica, L. (Wild Senna.) Leaflets 6-9 pairs, lanceolate- 

 oblong, obtuse ; petiole with a club-shaped gland near the base ; pods linear, 

 slightly curved, flat, at first hairy (2' - 4') ; root perennial. — Alluvial soil. July. 

 — Stem 3° -4° high. Leaves used as a substitute for the officinal Senna. 



2. C. occidentalis, L. Leaflets 4 -6 pairs, ovate-lanceolate, acute ; an ovate 

 gland at the base of the petiole ; pods long-linear (5' long) with a tumid border, 

 glabrous. — Virginia and southward. Aug. (Adv. from Trop. Amer.) 



3. C. obtusifdlia, L. Leaflets 3 or rarely 2 pairs, obovate, obtuse, with an 

 elongated gland between those of the lower pairs or lowest pair ; pods slender, 

 6' long, curved; root annual. — Banks of the Ohio River, Illinois (Dr. Vasey), 

 S. Virginia and southward. 



* * Leaflets small, somewhat sensitive to the touch : stipules striate, persistent : a cap- 



shaped gland beneath the lowest pair of leaflets : anthers all perfect : flowers in 



, small clusters above the axils : pods flat: root annual. 



^Aa^-ocV\Ys\p 4 - c - ChamSBCrista, L. (Partridge Pea.) Leaflets 10-15 pairs, 

 linear-oblong, oblique at the base; flowers (large) on slender pedicels; anthers 10, 

 elongated, unequal (4 of them yellow, the others purple) style slender. — Sandy 

 fields: common, especially southward. Aug. — Stems spreading, l°long: 2 

 or 3 of the showy yellow petals often with a purple spot at the base. 



5. C. nictitans, L. ("Wild Sensitive-Plant.) Leaflets 10-20 pairs, 

 oblong-linear; flowers (very small) on very short pedicels; anthers 5, nearly equal; 

 style short. — Sandy fields, New England, near the coast, to Illinois and south- 

 ward. Aug. - Sept. 



35. GYMNOCLADUS, Lam. Kentucky Coffee-tree. 



Flowers dioecious or polygamous, regular. Calyx elongated-tubular below, 

 5-cleft. Petals 5, oblong, equal, inserted on the summit of the calyx-tube. Sta- 



