LEGUMINOS^E. (PULSE FAMILY.) 109 



4. C. nictitans, L. (Wild Sensitive-Plant.) Leaflets 10-20 

 pairs, oblong-linear; flowers [very small) on very sliort pedicels; anthers 5, nearly 

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

 Illinois and southward. Aug. 



33. GYMNOCLADUS, 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- 

 seeded. 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 /eAdSos, a branch, alluding 

 to the stout branches destitute of spray.) 



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

 Penn. to Illinois and south westward. 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. GLEDITSCIIIA, 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. G. triacanthos, L. (Three-thorned Acacia, or Honey-Lo- 

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

 what serrate; pods linear, elongated (l°-l£° 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. Cr. monosperma, Walt. (Water-Locust.) Thorns slender; 

 mostly simple ; leaflets ovate or oblong; pods oval, l-sceded, 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 J>, 

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

 several-seeded, 2-valved, smooth. — Herbs with twice-pinnato 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 flowerr,. (Name 

 composed of bio~p.a, a bond, and av3os, flower.) 



10 



