144 LEGUMINOS^E. (PULSE FAMILY.) 



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 at the base. Petals 5, little unequal, spreading. 

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

 opening by 2 pores or chinks at the apex. 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 panided : 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 ofiicinal Senna. 



2. C. OCCIDENTA.LIS, 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. Obtusif61ia, 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 Biver, Illinois (Dr. Vasey), 

 S. Virginia and southward. 



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



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

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



4. C. Chamsecrista, 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, 1 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 dio3cious or polygamous, regular. Calyx elongated-tubular below, 

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



