CASSIACEAE. 57 



distinct, or rarely slightly coherent. Filaments distinct or nearly so. Pod 

 linear, flat. 



1. L. glauca (L.) Benth. Shrub, or tree becoming 10 m. tall: leaflets 6-12 

 mm. long; blades narrowly oblong to lanceolate, over 1.5 mm. wide: calyx 

 2-2.5 mm. long or rarely shorter: petals 4-4.5 mm. long: pods 10-15 cm. 

 long. — Hammocks, U. keys, L. keys.— [E. K.] — (Ber., Bah., Cuba, Ant.) — 

 Lead-tree. 



6. ACUAN Medic. Perennial herbs, often somewhat woody near the base. 

 Leaves 2-pinnate: leaflets small, numerous. Spikes capitate. Calyx-lobes 

 minute. Petals distinct, sometimes clawed. Filaments distinct. Pod flattish. 



Gland between the lower pair of pinnae orbicular : pods 3-5.5 cm. long. 1. A. deprcssa. 

 Gland between the lower pair of pinnae oblong : pods 6-8 em. long. 2. A. virgata. 



1. A. depressa (H.B.K.) Kuntze. Stems 3-8 dm. long: blades of leaflets 

 narrowly oblong, 2-5 mm. long: calyx 1.5-2 mm. long: petals 2.5 mm. long; 

 blades spatulate: pods 3-5.5 mm. long. — Pinelands and open sandy places, L. 

 keys. — {Bah., Cuba, Ant.) 



2. A. virgata (L.) Medic. Stems 3-11 dm. long: blades of the leaflets linear 

 to oblong, 4-8 mm. long: calyx about 2.5 mm. long: petals about 3 mm. long; 

 blades spatulate: pods 6-8 cm. long. — Hammocks and cultivated grounds, U. 

 keys. — (Ber., Bah., Cuba, Ant.) 



7. NEPTUNIA Lour. Perennial unarmed diffuse, prostrate, or float- 

 ing plants. Leaves 2-pinnate: leaflets numerous, small or minute. Spikes 

 globose or cylindric. Calyx-lobes shorter than the tube. Petals distinct or 

 partially united. Filaments distinct or nearly so. Ovary short-stipitate. Pod 

 oblique. 



1. N. floridana Small. Stem and branches sparingly pubescent or glabrate: 

 leaflets 3-4 mm. long; blades linear to linear-lanceolate: calyx-lobes triangu- 

 lar-lanceolate, acuminate: petals acuminate: pods 2.5-3.5 cm. long. — Pine- 

 lands, L. keys. — [E. K.] — (Ciiba.) 



Family 4. CASSIACEAE. Senna Family. 



Trees, slimbs, or herbs. Leaves alternate : blades compound, usually 

 1-2-piDnate, rarely 1-foliolate. Flowers perfect, polygamous, monoecious, 

 or dioecious, more or less irregular. Calyx of 3-5, usually slightly united 

 sepals, sometimes borne on the edge of a well-developed hypanthium. 

 Corolla of 3-5 unequal distinct petals. Androecium of 6-10 distinct or 

 nearly distinct stamens. Gynoecium 1-earpellary. Fruit a legume. 



Sepals, and petals, usually 5 : stamens 5-10. 

 Leaves with 1-pinnate blades. 



Pods indehiscent or tardily dehiscent : corolla nearly regular, the five petals 



slightly unequal : calyx-lobes obtuse. 1. Cassia. 



Pods elastically dehiscent : corolla very irregular, one of 

 the lateral petals (standard) and the lowest petal large, 

 the others greatly reduced : calyx-lobes acuminate. 2. Chamaecrista. 



Leaves with 2-pinnate blades. 



Pods long, smooth : standard with a suborbicular or reni- 

 form blade. 

 Leaf with a very short petiole which ends in a spine, 



each division with a long flat phyllode-like rachis. 3. Pabkinsonia. 

 Leaf with a decided petiole, the rachises not phyllode- 

 like. 

 Calyx-lobes valvate. 4. Delonix. 



Calyx-lobes imbricate. 



