124 LEGUMINOS.E. (PULSE FAMILY.) 



the upper suture winged. Trees, with broadly cordate simple stipulate 

 leaves, aud reddish purple clustered flowers appearing before the leaves. 



1. C. Canadensis, L. Rich soil. Feb. - March. Tree 15-20 high. 

 Flowers very numerous, from lateral buds. 



43. CASSIA, L. SENNA. 



Calyx of 5 nearly distinct sepals. Petals 5. unequal. Stamens 5-10. 

 Anthers mostly of different forms, opening by two terminal pores. Leg- 

 ume many-seeded. Seeds often separated by cross partitions. Herbs or 

 shrubs. Leaves abruptly pinnate. Flowers yellow. 



* Stamens 10, unequal : part of the anthers abortive: sepals obtuse: stipules 



deciduous. 



1. C. OCCidentalis, L. Annual, smoothish ; stem stout, branching ; leaf- 

 lets about 10, ovate or ovate-lanceolate, acute; petiole with a globular gland 

 at the base; racemes 2 - 4-flowered, the upper ones crowded. Waste places, 

 common. Stem 1 - 5 high. Legume linear, compressed, slightly incurved, 

 3' -4' long. 



2. C. obtusifolia, L. Annual, roughish ; stem slender, leaflets 6, cune 

 ate-obovate, with a tooth-like gland between the lowest pair ; flowers by pairs ; 

 legume narrow-linear, 4-angled, recurved. With the preceding. Stem 

 l-4 high. Legume 6'- 10' long. 



3. C. Marilandica, L. Perennial, smoothish; leaflets 12-18, oblong, 

 acute ; petiole with a club-shaped gland near the base ; racemes several- 

 flowered, the upper ones crowded, forming a compact panicle ; legume linear, 

 curved. Rich soil. August. Stem 3 - 4 high. Legume 3' - 4' long. 



Var.? Floridana. Leaflets smaller (1 A' long), often alternate ; pedicels 

 longer (1^'long); legumes straight, flat, 3" wide; seeds orbicular; flowers 

 not seen. St. John's County, Fast Florida (Mr. Seddiny). 



4. C. ligustrina, L. Smooth or nearly so; stem branched; leaflets 6- 

 10, oblong, illuminate, very oblique at the base, with a conical gland on the 

 petiole or between the lowest pair of leaflets ; flowers in a terminal panicle, on 

 slender pedicels ; sepals obloug-obovate ; petals veiny ; legume (3'- 4' long) 

 broadly linear, flat, straight or somewhat falcate, many-seeded. South 

 Florida. Feb. Leaflets 9"- 12" long. Legumes 4" wide. 



5. C. biflora, L. Shrubby ; leaflets 4-10, oblong, narrowed at the base, 

 mucrouate, with an obovoid gland between the lowest pair ; racemes 2-4- 

 flowered, often by pairs, slender, shorter than the leaves ; fertile anthers 5 ; 

 legume linear, flat, straight or somewhat falcate, smooth, many-seeded. Key 

 West. Leaflets 1' long. Legume 3' long, 2" Avide. 



* * Stamens 5-10: anthers all perfect: sepals acute: stipules persistent: 



legumes erect. 



6. C. Chamsecrista, L. Annual ; stem smooth or rusty-hairy ; leaflets 

 small, numerous, linear oblong, mucronate; stipules acuminate, nerved; 

 flowers borne above the axils, large, clustered, on long pedicels ; anthers 10; 

 style slender ; legume linear, nearly straight. Dry barren s^il. July - Au- 

 gust. Stem 1- 1| high. Part of the petals often purple at the base. 



