LEGUMINOS^E. (PULSE FAMILY.) 109 



4. C. 11 i< titans, L. (WILD SENSITIVE-PLANT.) Leaflets 10-20 

 pairs, oblong-linear; flowers (very smatt) on very short pedicels; anthers 5, nearly 

 equal; style very short. Sandy fields, New England, near the coast, to 

 Virginia and southward. Aug. 



33. GYMNOCL.ADUS, Lam. KENTUCKY COFFEE-TREE. 



Flowers dioecious, regular. Calyx tubular below, 5-cleft. Petals 5, oblong, 

 equal, inserted on the summit of the calyx-tube. Stamens 10, distinct, short, 

 inserted with the petals. Pod oblong, flattened, hard, pulpy inside, several- 

 seoded. Seeds flattish. A tall large tree, with rough bark, stout branchlets, 

 not thorny, and very large unequally twice-pinnate leaves. Flowers whitish, in 

 axillary racemes. (Name from yvpvos, naked, and /cAdfios, a branch, alluding 

 to the stout branches destitute of spray.) 



1. G. Canadciisis, Lam. Rich woods, by rivers, W. New York and 

 Penn. to Illinois and southwestward. June. Cultivated as an ornamental 

 tree : timber valuable. Leaves 2 - 3 long, with several large partial leafstalks 

 bearing 7-13 ovate stalked leaflets, the lowest pair with single leaflets. Pod 

 6' - 10' long, 2' broad ; the seeds over across. 



34. GLEDITSCHIA, L. HONEY-LOCUST. 



Flowers polygamous. Calyx of 3-5 spreading sepals, united at the base. 

 Petals as many as the sepals, and equalling them, the 2 lower sometimes united 

 Stamens as many, distinct ; inserted with the petals on the base of the calyx. 

 Pod flat, 1 - many-seeded. Seeds flat. Thorny trees, with abruptly once or 

 twice pinnate leaves, and inconspicuous greenish flowers in small spikes 

 Thorns above the axils. (Named in honor of Gleditsch, a botanist contem 

 porary with Linnaeus.) 



1. O. triac&iithos, L. (THREE-THORNED ACACIA, or HONEY-LO- 

 CUST.) Thorns stout, often triple or compound; leaflets lanceolate-oblong, some- 

 what serrate; pods linear, elongated (1-1^ long), often twisted, filled with 

 sweet pulp between the seeds. Rich woods, Penn. to Illinois and southwest- 

 ward. June. Common in cultivation as an ornamental tree, and for hedges. 



2. O. monosperma, Walt. (WATER-LOCUST.) Thorns slender; 

 mostly simple; leaflets ovate or oblong ; pods oval, l-seeded, pulpless. Swamps, 

 Illinois and southwestward. July. A small tree. 



SUBORDER III. MIMOSE^E. THE MIMOSA FAMILY. 



35. DESMAN THUS, Willd. DESMANTHUS. 



Flowers perfect or polygamous. Calyx campanulate, 5-toothed. Petals 5, 

 distinct. Stamens 5 or 10. Pod flat, membranaceous or somewhat coriaceous, 

 several-seeded, 2-valved, smooth. Herbs with twice-pinnate leaves of numer- 

 ous small leaflets, and with one or more glands on the petiole, setaceous stipules, 

 and axillary peduncles bearing a head of small greenish- white flowern. (Name 

 composed of Seoyza, a bond, and av0os, flower.) 

 10 



