LEGUMINOS^E. (PULSE FAMILY.) 115 



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



6. C. Chamaecrista, 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 slen- 

 der ; legume linear, nearly straight. Dry barren soil, Florida to Mississippi, and 

 northward. July and August. Stem 1- 1^ high. Part of the petals often 

 purple at the base. 



7. C. nictitans, L. Annual; pubescent; leaflets numerous, oblong-linear; 

 stipules and bracts subulate ; flowers small, 2 - 3 in a cluster above the axils, on 

 short pedicels ; petals unequal ; stamens 5, nearly equal. 



"Var. aspera. (C. aspera, Ell.) Hirsute; stamens 7-9, very unequal; ovary 

 very hairy ; flowers larger. Dry old fields, Florida to North Carolina, and 

 westward. August. Stem 1 high, often prostrate. Leaflets about 40, sensi- 

 tive, like those of the preceding species. 



44. GLEDITSCHIA, L. HONEY-LOCUST. 



Flowers polygamous. Sepals 3-5, united at the base, spreading. Petals as 

 many, or less by the union of the 2 lower ones. Stamens 3 - 5, distinct, inserted 

 with the petals on the base of the calyx. Legume stipitate, flat, 1 - many-seed- 

 ed. Seeds compressed. Thorny trees. Leaves abruptly 1 - 2-pinnate, with 

 oblong serrate leaflets. Flowers small, greenish, in short spikes. 



1. G. triacanthos, L. Leaflets lanceolate-oblong; thorns mostly com- 

 pound ; legume very long, many-seeded, pulpy within. Rich woods, Florida 

 to Mississippi, and northward. June and July. A large tree. Legume 12'- 18' 

 long, 1' wide, twisted. 



2. G. monosperma, Walt. Leaflets ovate or oblong ; thorns mostly 

 simple ; legume short, obliquely oval, 1-seeded, not pulpy. Deep river swamps, 

 Florida to Tennessee, and westward. July. A small tree. Legume 1' long. 



SUBORDER HI. WIIIflOSEJE. MIMOSA FAMILY. 



45. MIMOSA, L. SENSITIVE-PLANT. 



Flowers polygamous. Calyx minute, 4-5-toothed. Petals united into a 

 4-5-cleft tubular-campanulate corolla. Stamens 4-15, distinct, much exsert- 

 ed. Legume compressed, mostly jointed, 1 - many-seeded ; the broad valves 

 separating at maturity from the persistent margins. Herbs, shrubs, or trees. 

 Leaves bipinnate, sensitive. Flowers white or rose-color, capitate or spiked, on 

 axillary peduncles. 



1. M. Strigillosa, Torr. & Gray. Herbaceous and rough with scattered 

 appressed rigid hairs ; stem prostrate ; leaves long-petioled ; pinnae 5-6 pairs ; 

 leaflets 10-14 pairs, oblong-linear; peduncles longer than the leaves ; heads of 

 flowers elliptical ; legume oval or oblong, 1 - 3-jointed, hispid. Banks of rivers, 

 East Florida, and westward. July and August. Flowers rose-color. 



