294 LEGUMINOS/E. Robinia. 



Texas, Driimmond ! — Not being able at present to consult the figure of 

 Cavanilles, we are in doubt whether the Texan plant be the D. longifolia, DC. 

 The leaflets are for the most part obtuse and mucronate. The keel, moreover, 

 is not " very obtuse", and the seeds are subglobose. 



17. GLOTTIDIUM. Desv.jour. hot. 3. p. 119, t.l; DC. prodr. 2. p. 266. 



Calyx campanulate, somewhat obliquely truncate, 5-toothed; teeth small, 

 rather obtuse, nearly equal. Vexillum reniform, very short and broad, slightly 

 unguiculate: wings oval-oblong: keel-petals coherent above the middle. 

 Stamens diadelphous. Style short, incurved at the summit. Legume ellip- 

 tical-oblong, compressed, acute at each end, stipitate, cuspidate with the 

 style, l-celled, 2-valved, 2-seeded ; valves at length separating into an exte- 

 rior rather coriaceous membranous portion, and an internal membrane which 

 encloses the seeds. Seeds compressed, transversely oblong : radicle thick, 

 inflexed. — An annual glabrous herb. Leaves abruptly pinnate, with nume- 

 rous leaflets; the petiole ending in a bristle : primordial leaves simple, ovate. 

 Racemes axillary, few-flowered. Flowers small, yellow. 



G. Floridanum (DC. 1. c.) — Robinia vesicaria, Jacq. ic. rar. 1, t. 148. 

 Phaca Floridana, Willd. sp. 3. p. 1252. Sesbania platycarpa, Pers. syn. 2. 

 p. 316; Nutt. ! gen. 2. p. 112. S. disperma, Pursh, fl. 2. p. 485. S. vesi- 

 caria. Ell. sk. 2. p. 222. ^schynomene platycarpa, Michx. ! jl. 2. p. 75. 



Damp soils, S. Carolina to Florida I Louisiana! and Texas! Aug.-Sept. 

 — Plant 4-6 feet high. Leaflets linear-oblong, mucronate. Peduncles fili- 

 form, shorter than the leaves, 4-8-flowered. Calyx very short. Legume 

 about 2 inches long, on a slender stipe ; the outer coriaceo-membranaceous 

 portion at length falling away, leaving the seeds enclosed in the thin white 

 inner membrane. 



2. Leaves unequally pinnate (in Psoralea various). 



A. Corolla truly papilionaceoiis : Jloiccrs in racemes. 



18. ROBINIA. Linn, (in part) ; DC. mem. Leg. p. 273, ^ prodr. 2. p. 261. 



Calyx short and somewhat campanulate, 5-toothed or 5-cleft ; the 2 upper 

 segments shorter, approximated or cohering. Vexillum broad and large : 

 keel obtuse. Stamens diadelphous, deciduous. Style bearded along the in- 

 side (next the free stamen). Legume many-seeded, compressed, nearly ses- 

 sile, the seminiferous suture margined ; valves flat and thin. Seeds flat. — 

 Trees or shrubs (N. American), usually bearing stipular spines. Leaves 

 unequally pinnate : leaflets petiolulate, stipellate. Flowers showy, white or 

 rose-color, in simple usually pendant axillary racemes. — Locust-tree. 



1. R. Pseudacacia (Linn.) : branches virgate, armed with stipular prickles ; 

 racemes loose, droopmg, and (with the legumes) smooth; leaflets ovate and 

 oblong-ovate.— Lam. ill. t. 606 ; Michx. ! fl. 2. p. 65 ; Pursh, Jl. 2. p. 487 ; 

 EU. sk. 2. p. 242 ; Michx. f. sylv. 2. p. 1, t. 76 ; DC. I. c. ; Darlingl. fl. 

 Cest. p. 410. Pseudacacia, Tourn. inst. t. 417. 



Fertile soils, particularly west of the Alleghany Mountains to Arkansas! 

 not indigenous north of Pennsylvania, or near the sea-coast in the Southern 

 States. May-June. — Tree 20-70 or 90 feet high: wood yellowish, compact 



