LEGUMINOS^E. (PULSE FAMILY.) 145 



mens 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 branehlets, not thorny, and large unequally twice-pinnate leaves; 

 the leaflets standing vertically. — Flowers whitish, in axillary racemes. (Name 

 from yvfxvos, nuked, and Kkddos, a branch, alluding to the stout branches desti- 

 tute of spray.) 



1 . G. Canadensis, Lam. Rich woods, along 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 i' across. 



36. GLEDITSCHIA, L. Honey-Locust. 



Flowers polygamous. Calyx short, 3 - 5-cleft, the lobes spreading. Petals 

 as many as the sepals and equalling them, the 2 lower sometimes united. Sta- 

 mens 3-10, 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 pin- 

 nate leaves, and inconspicuous greenish flowers in small spikes. Thorns above 

 the axils. (Named in honor of J. G. Gleditsch, a botanist contemporary with 

 Linnaeus.) 



1. G. triacanthos, L. (Three-thorned Acacia, or Honey-Locust.) 

 Thorns stout, often triple or compound; leaflets lanceolate-oblong, somewhat ser- 

 rate; pods linear, elongated (1°- 1 j° long), often twisted, filled with sweet pulp 

 between the seeds. — Rich woods, Penn. to Virginia, Illinois, and southwest- 

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



2. G. 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. 



37. DESMANTHUS, Willd. Desmaxtiius. 



Flowers perfect or polygamous, regular. 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 numerous small leaflets, and with one or more glands on the petiole, setaceous 

 stipules, and axillary peduncles bearing a head of small greenish-white flowers. 

 (Name composed of Seoy-ia, a bond, and audos, flower.) 



1. D. brach^lobus, Benth. Nearly glabrous perennial, erect (l°-4 <> 

 high); partial petioles 6-15 pairs; leaflets 20 - 30 pairs ; stamens 5 ; pods ob- 

 long or lanceolate, curved, scarcely 1' lone:, 2 - 6-seeded. (Darlingtonia brachy- 

 loba & glandulosa, DC.) — Prairies and alluvial banks, Illinois and southwest- 

 ward. 



38. SCHRANKIA, Willd. Sensitive Briar. 



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

 a funnel-form 5-cleft corolla. Stamens 10-12, distinct, or the filaments united 

 at the base. Pods long and narrow, rough-prickly, several-seeded, 4-valved, i. e. 

 10 



