CAESALPINIACEAE. 165 



Leaves once pinnate. 



Anthers dorsifixed, longitudinally dehiscent; larger petals 3. 1. Tamarlndus. 

 Anthers basiflxed, mostly opening by terminal pores or 



slits ; petals 5. 



Pod not elastically dehiscent ; seeds with long funicles. 2. Cassia. 

 Pod elastically 2-valved ; seeds with short funicles. 3. Chumaecrista. 



Leaves twice pinnate. 



Petiole very short, terminating in a spine. 4. Parkinsonia. 



Petioles well developed. 



Stigma not peltate : pod not winged. 



Pod splitting through the middle of the valves. 5. Haematoxi/lum. 



Pod splitting along the sutures. 



Woody vines; pods broad, thick, mostly prickly. 6. Guilandina. 

 Trees or shrubs ; pods narrow, unarmed. 



Calyx-lobes imbricate ; shrubs and low trees. 

 Stamens and pistils little longer than the 



corolla. 7. Caesalpinia. 



Stamens and pistils much longer than the 



corolla. 8. Poinciana. 



Calyx-lobes not imbricated ; large introduced 



tree. 9. Dclonlx. 



Stigma peltate; pod flat, thin, winged. 10. Peltophorum. 



I. TAMARINDUS L. Sp. PL 34. 1753. 



An unarmed tree, with e\enly pinnate leaves, numerous and small leaflets, 

 the stipules caducous, and pink to yellow racemose flowers. Calyx-tube turbi- 

 nate, its 4 segments imbricated. Petals very unequal, the 3 upper ones large, 

 nearly alike, the 2 lower ones minute, scale-like. Perfect stamens 3, mona- 

 delphous; anthers longitudinally dehiscent; staminodia minute. Ovary stipi- 

 tate, few-many-ovuled, the stipe adnate to the calyx-tube; style long; stigma 

 terminal, subcapitate. Pod linear or linear-oblong, curved, little compressed, 

 indehiscent, the thin epicarp crustaceous, the mesocarp pulpy, the coriaceous 

 endocarp septate between the obovate-orbicular seeds. Endosperm none; coty- 

 ledons thick. [Latin name of the tree.] A monotypic genus. 



1. Tamarindus indica L. Sp. PI. 34. 1753. 



A large tree, sometimes 20 m. high or higher, with a trunk up to 1.5 m. 

 thick, the branches widely spreading, the young twigs slender, puberulent. 

 Leaves 6-12 cm. long, short-petioled, glabrous or nearly so; leaflets 10-18 pairs, 

 thin, reticulate-veined, oblong, 12-25 mm. long, rounded or retuse at the apex, 

 obliquely obtuse or subtruncate at the base ; racemes few-several-flowered, 

 mostly terminal and shorter than the leaves ; pedicels slender, 6-10 mm. long ; 

 calyx 8-10 mm. long; larger petals a little longer than the sepals; stamens a 

 little longer than the petals; pod 5-15 cm. long, about 2 cm. thick, the epicarp 

 brown, scaly, the flesh acid, the brown shining seeds about 1 cm. broad. 



Spontaneous after cultivation. Andros. New Providence and Inagua : Prob- 

 ably native of tropical Africa ; widely naturalized in tropical America. TAMARIND. 



2. CASSIA [Tourn.] L. Sp. PI. 376. 1753. 



Herbs, shrubs, or some tropical species tree?, with evenly pinnate leaves, and 

 mainly (in all our species) yellow flowers. Calyx-teeth nearly equal, generally 

 longer than the tube. Corolla nearly regular; petals 5, spreading, nearly equal, 

 imbricated, clawed. Stamens usually 10, sometimes 5, often unequal and some 

 of them imperfect; anthers all alike, or those of the lower stamens larger, 

 opening by 2 pores at the summit. Ovules oo. Pods various. Seeds often 

 rumerous. [Ancient name.] About 200 species, of wide distribution in warm 

 and temperate regions. Type species: Cassia Fistula L. 



