58 CASSIACEAE. 



Petals, except the standard, sessile or with very 



short claws. 5. CAESALPINIA. 



Petals, except the standard, long-clawed. 6. POIXCIANA. 

 Pods short, prickle-armed : standard with a cuneate or 



spatulate blade. 7. GriLAXDiNA. 



Sepals 4 : petals 3, often accompanied by 2 rudiments : stamens 3. 8. TAMABIXDCS. 



1. CASSIA [Tourn.] L. Herbs, shrubs, or trees. Leaves abruptly 1-pin- 

 nate: stipules deciduous. Flowers in axillary racemes or panicles. Sepals 

 nearly distinct, leathery or petaloid. Petals mainly yellow or whitish. Pod 

 more or less turgid, indehiscent or tardily dehiscent. SENNA. 



Plants herbaceous. 



Petiolar gland near the base of the rachls : blades of the leaflets not obovate. 



1. C. occidentalis. 

 Petiolar gland between the lower pair of leaflets : blades of 



the leaflets obovate or cuneate. 2. C. Tora. 



Plants woody. 3. C. bahamensis. 



1. C. occidentalis L. Plant annual, 5-15 dm. tall, nearly glabrous: leaflets 

 8-12; blades lanceolate, becoming lanceolate-elliptic, somewhat acuminate, 

 3.6-5 cm. long; petiolar gland globular, near the base of the rachis: stipules 

 broadly lanceolate: sepals 11-14 mm. long: petals 15-19 mm. long: pods 

 linear, glabrous, with the septa externally prominent, 8-13 cm. long, 6 mm. 

 wide. Pinelands and cultivated grounds, L. keys. Nat. of Trop. Am. [E. K.] 

 (Ber., Bah., Cuba, Ant.) 



2. C. Tora L. Plant annual, 4-15 dm. tall, nearly glabrous: leaflets 4-6; 

 blades obovate or cuneate-obovate, very slightly cuspidate, the terminal pair 

 much the largest, 3-5 cm. long: petiolar gland elongate, between the lower 

 pairs of leaflets: stipules linear-spatulate to setaceous: sepals 7-9 mm. long, 

 the larger ones ovate: petals 13-15 mm. long, very diverse in shape: pods 

 falcate, more or less tetragonal, 3-4 mm. wide. Pinelands and waste grounds, 

 L. keys. Nat. of Trop. Am. [E. K.] (Bah., Cuba, Ant.) 



3. C. bahamensis Mill. Plant woody: leaflets 6-10; blades subcoriaceous, 

 ovate or acutely elliptical, mucronate, 3.5-5 cm. long: petiolar gland de- 

 pressed, between the lower pairs of leaflets to near base of rachis: stipules 

 ovate to lanceolate: sepals 7-12 mm. long: petals 15-20 mm. long, or some- 

 times smaller: pods flat, with lateral depressions between the seeds, 9-11 cm. 

 long, 5 mm. wide. Pinelands, L. keys. [E. K.] (Bah., Cuba.) 



2. CHAMAECRISTA Moench. Herbs or shrubs. Leaves abruptly 1-pin- 

 nate: stipules persistent. Flowers clustered in leaf -axils. Sepals nearly dis- 

 tinct, membraneous. Petals mainly yellow or whitish. Pod flattish, promptly 

 dehiscent, the valves elastic. SENSITIVE-PEA. SENSITIVE-PLANT. 



Corolla large, over 2 cm. broad. 



Tall woody plant : smaller petals over 1.5 cm. long : pods glabrous. 1. C. bracMata. 

 Low or diffuse, partly woody plant : larger petals less than 1.5 



cm. long : pods pubescent. 2. C. grammica. 



Corolla small, less than 1.5 cm. broad. 



Stem and branches erect or ascending : leaflets mostly 40-54. 3. C. aspera. 

 Stem and branches prostrate or decumbent : leaflets mostly 



16-34. 4. C. Simpsonii. 



1. C. brachiata Pollard. Stem 2 m. tall or less, often widely branched above: 

 leaflets 20-28; blades linear, cuspidate, glabrous, midvein somewhat excentric: 

 petiolar gland much depressed, discoid: stipules lanceolate: sepals 15-20 mm. 

 long, glabrous or nearly so: standard 17-24 mm. long: pods 6-7 cm. long, 

 glabrous, often conspicuously banded. Pinelands, L. keys. [E. K.] 



2. C. grammica (Spreng.) Pollard. Stem densely pubescent: leaflets 6-16; 

 blades elliptic, oblong, or obovate, mucronate, subcoriaceous, canescent beneath, 



