PsoRALEA. ' LEGUMINOSiE. 303 



♦ ♦ Leaves pimmtdy Irifoliolate {rarely unifuliolale^. 



19. P. fiVs-a/a (Nutt.) : nearly glabrous ; stem virgate ; leaves 1-foliulatc 

 (lower ones rarely 2-3-foliolate), very remote; leaflets linear; stipules seta- 

 ceous; peduncles sliorter than tiie leaves ; spikes ovate-oblong ; bracts oblong; 

 calyx glandular, half as long as the corolla; segments lanceolate, the \o-wvt 

 one a little elongated.— A'»«. / iren. 2. p. 101; JCIL! sk. 2. p. 197; DC. 

 prodr. 2. p. 218. P. simplicifolia, /irrb. liuldic! 



Near St. Mary's, Georgia, Dr. liahhrin ! — Stem about 2 feet high, spar- 

 ingly branched. Leaflets of the radical leaves oblong; of the upper ones 

 2-4 inches long and 2-4 lines wide. Spikes rather compact: bracts decidu- 

 ous. Flowers pale violet, about ^ of an inch long. 



20. P. rnelilotoides (Michx.) : sparingly pubescent ; leaves 3-foliolate ; leaf- 

 lets oblong-lanceolate, dotted with glands; spikes oblong ; bracts broadly cor- 

 date and (like the calyx) glandular, conspicuously acuminate ; teeth of the 

 calyx triangular-ovate, the lowest one longest ; legumes orbicular, with strong 

 transverse wrinkles.-^3/("c/jj-..' //. 2. p. 5S ; Ell. sk. 2. p. 197 ; DC. prudr. 2. 

 p. 220 ; Barl. ft. Am. Sept. 2, t. 57. Trifolium psoraloidcs, Walt. Car. p. 184. 



/?. gracilis : stem very slender; nearly glabrous; leaflets thin, ovate-oblong, 

 dotted, glabrous above, the lower surface and margin slightly hairy. — P. gra- 

 cilis, Chapman! mss. 



Dry soils. Southern States ! /?. Pine woods, Middle Florida, Dr. Chap- 

 man ! May-June. — Stem branched, 2 feet high. Leaflets about 2 inches 

 long. Stipules lanceolate. Peduncles 3-4 times as long as the leaves. 

 Flowers 3 lines long, usually in pairs, on short' pedicels. Calyx and bracts 

 conspicuously glandular, veined with purple. — The bracts in our specimens 

 of 0. have fallen off. 



21. P. eglandulosa (Ell.) : pubescent, nearly destitute of glands ; leaves 

 3-foliolate; leaflets oblong-lanceolate ; spikes oblong ; bracts broadly lanceo- 

 late, conspicuously acuminate, and (as well as the calyx) viUous ; legume 

 nearly orbicular, with strong transverse wrinkles. Ell. sk. 2. p. 198; DC. 

 prodr. 2. p. 220. Melilotus psoraloides, Nutt.! gen. 2. p. 104, excl. syn. ? 



Dry soils, Virginia! to Florida! and west to Arkansas! May-June. — 

 Scarcely distinct from the preceding. 



22. P. simple.v (Nutt.! mss.): grayish-pubescent, obscurely glandular, 

 erect ; stem simple ; leaves 3-foliolate ; leaflets lanceolate, acute, rugosely 

 veined, mucronate ; peduncles very long ; spikes oblong, many-flowered ; 

 bracts linear-lanceolate, acuminate; teeth of the calyx oblong-triangular, the 

 lowest one longest and acuminate; legumes nearly orbicular, with strong 

 transverse wrinkles. 



Plains of Red River, Arkansas, Nidtall ! Texas, Drummond! — Root 

 somewhat fusiform. Stems solitary or two from the same root, 1-3 feet high. 

 Flowers larger than in P. melilotoides, bright purplish-blue. Calyx and petals 

 strongly veined. 



23. P. rhombifolia : sparingly pubescent ; leaves 3-foliolate ; leaflets rhom- 

 bic-ovate, shorter than the petioles ; peduncles longer than the leaves, at 

 length recurved ; spikes capitate, few-flowered ; bracts ovate, acuminate ; 

 teeth of the calyx lanceolate, the lowest one longest. 



Texas, Drummond! — Stem decumbent ?, slender, angular. Leaflets i-^- 

 of an inch long, dotted with scarcely visible glands. Petioles 1-2 inches 

 long. Spikes 6-8-flowered. Flowers purplish, 5-6 lines long. Calyx hir- 

 sute ; the teeth (except the lowest one) shorter than the tube. Vexillum ob- 

 ovate. Legume not seen. 



24. P. Onobrychis (Nutt.) : pubescent ; leaves 3-foliolate ; leaflets ovate, 

 acuminate ; racemes elongated, somewhat secund ; calyx much shorter than 

 the corolla, without glands ; the teeth small, obtuse, equal ; legume ovate, 



