316 LEGUMINOSiE. Trifolium. 



15. T. gracilcntum : nearly glabrous; stem slender, erect or ascending; 

 middle leaves on very long filiform petioles ; leaflets cuneate-obcordate, spi- 

 nulose-serrulate ; stipules rather foliaceous, the lower ones linear-lanceolate 

 and setaceously acuminate, the uppermost ovate-lanceolate and shorter : heads 

 loose, 15-25-flowered ; calyx glabrous ; the teeth lanceolate-subulate, setace- 

 ously acuminate, thrice the length of the tube and about one-third shorter 

 than the corolla ; legume 1-seeded. 



California, Douglas! — (J) Stem 8-10 inches high. Petioles of the mid- 

 dle leaves 4 inches long ; those of the lowermost and especially the upper- 

 most leaves much shorter. Heads as large as in T. repens : flowers purple. 



16. T. repens {hmn.): glabrous; stems creeping, difluse; leaflets obcor- 

 date, sometimes rather ovate and emarginate, denticulate; stipules scarious, 

 narrowly lanceolate ; heads of flowers globose, subumbellate, on very long 

 axillary peduncles ; teeth of the calyx unequal, lanceolate-subulate, shorter 

 than the tube; legume about 4-seeded. — Evg. hot. t. 1769; Michx. ! jl. 2. p. 

 59 ; Pursh, fl. 2. p. All ; Darhngt. fi. Cest. p. 407. 



Pastures and Avaste places, sometimes in woodlands; common throughout 

 North America. April-Nov. — !(. Flowers Avhite, sometimes purplish, with- 

 ering and becoming pale dirty brown when old. — White Clover. 



' 17. T. aviphian/Jnim : small; stems creeping, a little puberulent ; leaflets 

 (small) broadly obcordate, crenulate ; stipules scarious, ovate, obtuse, or Avith 

 a short abrupt point ; heads rather f'eAV-IioAvered, on long filiform peduncles; 

 teeth of the calyx lanceolate-subulate, as long as the tube ; legume 3-4-seed- 

 ed ; the stoloniferous branches also bearing solitary fertile floAvers in the axils 

 of the leaves, on short recurved peduncles. 



Texas, Drrimmond! — 11 Rooting stems throwing up leav^es at intervals 

 of about half an inch. Peduncles 2-3 times the length of the leaves: vexil- 

 lum ovate. Radical floAvers (subterranean? ) perfect, ripening 2-3 seeds; 

 the corolla and teeth of the calyx very short ; style very short, recurved. 



-— / IS. T. Carolinianum (Michx.) : small, more or less pubescent ; stems at 

 first erect, at length diffuse or procumbent ; leaflets cuneate-obcordate (the 

 upper ones only emarginate), crenulate ; stipules ovate, acuminate, fohaceous ; 

 heads fcAV- (10-20-) floAvered, depressed; calyx parted almost <to the base; 

 the teeth lanceolate, rather unequal, a httle shorter than the corolla ; vexilluin 

 roundish-ovate, Avith a short abrupt point, covering the wines and keel ; le- 

 gume 4 seeded.— /1/m-/!.2-..' /?. 2. p. 58; Ell. sk. 2. p. 200; DC. prodr. 2. p. 

 201. T. umbcllatum, Seringe., in DC. I. c. T. oxypetalum, Fisch. <f 

 Meyer, ind.sem. St. Petersb. {Dec. 1835) p. 51. 



Sandy fields, S. Carolina! to Florida! west to Arkansas! and Texas! 

 March-May. — [T) Plant 3-6 or S inches high, at first erect and simple, at 

 length much branched from the base, and forming tufts. Calyx often pur- 

 plish. Corolla white, tinged Avith purple. 



* * * Corolla yellow, turning to chestnut-brownwhcn old, scarious andjpersistent : jlow- 

 ers in ovate heads, at length dejlexed : calyx not inflated after Jlowering. {Leaves 

 .often f innately trifoliolate.) 



19. T, prncumbens {hinri.): stem procumbent or ascending, pubescent ; 

 leaves on short petioles ; leaflets cuneate-obcordate, or cuneate-oblong and 

 emarginate, denticulate, the loAver pair distant from the terminal one; sti- 

 pules rather foliaceous, ovate, ciliate, much shorter than the petioles ; heads 

 of flowers dense, on slender axillary peduncles ; teeth of the calyx unequal, 

 the two upper ones very short; vexillum striate when old ; legume 1-seeded. 

 — Pursh, /?. 2. p. 479 ; DC. prodr. 2. p. 205 ; Bigel.fi. Bost. p. 271; 

 Darlingt.fi. Cest. p. 408. T. minimum, Bart, prodr.fi. Philad. 2. p. 74. 



