CAESALPINIACEAE. $2$ 



Herbs (all our species); flowers perfect; leaves pinnate or bipinnate; corolla nearly 

 regular. 



Leaves pinnate, not punctate. 2. Cassia. 



Leaves bipinnate, glandular-punctate. 3. Hoffmanseggia 

 Trees ; leaves pinnate or bipinnate ; flowers dioecious or polygamous. 



Receptacle short; stamens 3-5; pod flat. 4. Gleditsia. 



Receptacle elongated; stamens 10; pod oblong, woody. 5. Gymnocladus. 



.. CERCIS L. 



Small trees or shrubs, with broad leaves, and pink flowers in short lateral fas- 

 cicles borne on the twigs of preceding season. Calyx somewhat oblique, broadly 

 campanulate, 5 -toothed. Corolla irregular; petals 5; standard enclosed by the 

 wings in the bud; keel larger than the wings. Stamens 10, distinct, declined; 

 anthers all alike, versatile, longitudinally dehiscent. Ovary short-stipitate; ovules 

 00 . Pod linear-oblong or oblong, flat, margined along the upper suture, 2-valvde 

 at maturity, the valves thin, reticulate-veined. [Ancient name of the Old World 

 Judas-tree]. About 5 species, natives of N. A., Europe and temperate Asia. 



1. Cercis Canadensis L. Red-bud. American Judas-tree. (I. F. f. 

 2033.) A tree, with greatest height of about 18 m., or often shrubby. Stipules 

 membranous, small, caducous ; leaves petioled, cordate-orbicular, blunt-pointed, 

 rather thick, glabrous, or pubescent along the veins beneath, 5-15 cm. broad; 

 flowers several together in sessile umbellate clusters, appearing before the leaves; 

 pedicels slender, 8-25 mm. long; corolla pink-purple, about 8 mm. long; pod short- 

 stalked in the calyx, linear-oblong, acute at each end. glabrous, 5-8 cm. long, 

 several-seeded. In rich soil, S. Ont. to Minn., Neb., N. J., Fla. and Tex. April. 



2. CASSIA L. 



Herbs, shrubs, or in tropical regions trees, 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 00 . Pod often curved. Seeds numerous. [Ancient 

 name.] About 275 species, of wide distribution in warm and temperate regions. 

 Besides the following, about 20 others occur in the Southern States. 



Leaflets linear to oblong, numerous, 6-20 mm. long ; plants 1.5-6.5 dm. high. 



Flowers 4-8 mm. broad, short-pedicelled ; anthers 5. 1. C. nictitans. 



Flowers 2.5-4 cm. broad, slender-pedicelled ; anthers 10. 2. C. Chamaecrista. 



Leaflets ovate, oblong or obovate, 2-5 cm. long ; plants 3-15 dm. high. 



Leaflets 6 or 4, broadly obovate. 3. C. Tora. 



Leaflets 8-18, oblong or ovate-lanceolate. 



Perennial ; leaflets oblong, obtuse. 4. C. Marylandica. 



Annual; leaflets ovate-lanceolate, acute or acuminate. 5. C. occidentalis. 



1. Cassia nictitans L. Sensitive Pea. Wild Sensitive-plant. (I. F. 

 f. 2034.) Annual, more or less pubescent, 1.5-4 dm. high. Stipules subulate- 

 linear, persistent; leaves petioled, sensitive, bearing a small gland near the base of 

 the petiole; leaflets 12-44. linear-oblong, obtuse and mucronate at the apex, rounded 

 and oblique at the base, 6-16 mm. long, 2-3 mm. wide; flowers 2-3 together in the 

 axils; calyx-lobes acute or acuminate; stamens 5, all perfect; pod linear, 2.5-4 

 cm. long. In dry soil. Me. to Ga., Ind., Kans. and Tex. July-Oct. 



2. Cassia Chamaecrista L. Partridge Pea. Large-flowered Sensi- 

 tive Pea. (I. F. f. 2035.) Annual, widely branched. Stipules subulate-linear, 

 persistent; leaves petioled, with a sessile gland on the petiole, sensitive; flowers 

 2-4 together in the axils, showy, some of the petals often purple-spotted ; leaflets 

 20-30, linear-oblong or the upper lanceolate, obtuse, mucronate, oblique at the base, 

 8-20 mm. lon^, 3-4 nim. wide; calyx-lobes long-acuminate; stamens 10, all per- 

 fect; pod linear, pubescent or glabrate, 3-6 cm. long, 4-6 mm. wide. In dry soil, 

 Me. to S. Dak., Fla. and Tex. July-Sept. 



Cassia Chamaecrista robusta Pollard. Taller; stems stouter, densely pubescent; 

 flowers larger. Ky. to Ala. and Miss. 



3. Cassia Tora L. Low Senna. (T. F. f. 2036.) Annual, glabrous, 4-6 

 dm. high. Stipules linear-subulate, at length deciduous; leaves petioled, the gland 



