186 



LEGUMINOS^E. LXX. TRIFOLIUM. 



peduncles ; involucre cup-shaped, truncate, veiny, and toothed, 

 length of flowers ; stipulas ovate, short ; calyxes membranous, 

 the segments setaceous, 3-5-parted, length of corolla. I/ . H. 

 Native with the two preceding species. Flowers purplish. 

 Cup-bearing Trefoil. PI. prostrate. 



57 T. INVOLVCRA'TI-M (Willd. spec. 3. p. 1372.) plant quite 

 smooth; stems straight, erect ; petioles long ; upper leaflets ob- 

 long-linear, sharply-toothed ; stipulas membranous, narrow, linear, 

 very acute ; heads pedunculate, hemispherical, girded by an or- 

 bicular, toothed involucrum ; bracteas bifurcate, but multifid ac- 

 cording to Kunth ; segments of the calyx setaceous, longer than 

 the tube, and much shorter than the corolla ; ovary stipitate, 5- 

 6-ovulate. 0. H. Native of Mexico, near Valladolid, at the 

 height of 6000 feet. H. B. et Kunth, nov. gen. amer. 6. p. 

 302. Kunth, pi. legum. 186. t. 53. Flowers purplish. Stigma 

 small, oblique, rather linear, obtusely papillose. 



Invol iterated Trefoil. PL 1 foot. 



58 T. MUCRONA'TUM (Willd. herb, ex Spreng. syst. 3. p. 208.) 

 stem ascending, 1 -leaved; leaflets linear, mucronate, serru- 

 lated ; stipulas broad, lanceolate, cuspidate ; calyxes bracteate, 

 the teeth awned and equal, shorter than the corolla ; heads of 

 flowers roundish. If.. H. Native of New Spain. 



Mucronate-lcafietted Trefoil. PI. ascending. 



59 T. MICROCE'PIIALUM (Pursh, fl. amer. sept. 2. p. 478.) stem 

 ascending, pubescent ; leaflets obovate, emarginate, denticu- 

 lated ; stipulas ovate, acuminated ; heads of flowers small, few- 

 flowered, on long peduncles ; flowers sessile in the heads ; leaf- 

 lets of involucrum ovate, awned ; calycine segments awned, 

 length of corolla. Tf. . H. Native of North America, on the 

 banks of Clark's river, and of California. Flowers pale-purple. 



Small-headed Trefoil. PI. 1 foot. 



60 T. PA'LLIDUM (Waldst. et Kit. pi. rar. 1. p. 35. t. 36.) 

 stems diffuse ; leaflets ovate-roundish, denticulated ; stipulas 

 pilose, broad, setaceous at the apex ; heads of flowers globose, 

 rather hispid, hardly pedunculate ; calycine segments setaceous, 

 pilose, unequal, shorter than the monopetalous corolla ; seeds 

 ovate, compressed, yellow, globose. O- H. Native of Hun- 

 gary, in meadows and corn-fields. This plant is nearly allied 

 to T. pratense, but the heads are smaller, the flowers are white, 

 and the vexillum is emarginate. 



Pale-Roweieil Trefoil. Fl. Ju. Jul. Clt. 1803. PI. diffuse. 



61 T. DIFFU'SUM (Ehrh. beitr. 7. p. 165.) plant soft, villous, 

 and glaucous ; stems diffuse ; leaflets ovate-lanceolate, obtuse or 

 retuse ; stipulas narrow, ending in a linear-lanceolate acumen ; 

 heads of flowers ovate, rather hispid ; calycine segments seta- 

 ceous, very villous, straight, equal, shorter than the monopeta- 

 lous corolla ; legume circumcised, 2-seeded ; seeds bay-co- 

 loured, irregularly obcordate. Q. H. Native of Hungary, in 

 sandy places, and about Paris. Waldst. et Kit. hung. 1. p. 40. 

 t. 50. T. ciliosum, Thuill. fl. par. ed. 2. p. 380. Flowers pur- 

 ple. Perhaps a variety of T. hirlum. 



'Diffuse Trefoil. Fl. July, Aug. Clt. 1801. PL i foot. 



62 T. HETEROPHY'LLUM (Tratt. arch. 1. p. 26. with a figure,) 

 stems procumbent, diffuse, very straight, lower leaflets obcor- 

 date, upper ones ovate or lanceolate ; stipulas ovate, awned ; 

 heads of flowers globose, solitary, dense ; calycine segments 

 nearly equal,' about equal in length to the tube of the monope- 

 talous corolla, if. H. Native of the top of mount ^Etscher. 

 Flowers red. 



Variable-leaved Trefoil. PI. procumbent. 



63 T. III'RTUM (All. auct. p. 20.) stem erect; leaflets ob- 

 ovate, cuneated, nearly entire ; lower stipulas narrow, each end- 

 ing in a long acumen, upper ones short, and very broad ; heads 

 of flowers nearly globose, hispid ; calycine segments very long, 

 about equal in length to the corolla, hardly unequal ; seeds 

 large, regularly ovate, very blunt. Q. H, Native of the south 



1 



of Europe. T. hispidum, Desf. atl. 2. p. 200. t. 209. f. 1. 

 Flowers rose-coloured. Plant hairy. 



far. p, pictum (Ser. mss. in D. C. prod. 2. p. 196.) leaflets 

 denticulated, spotted with red. T. pictum, Roth, cat. 2. p. 201. 

 Savi, obs. trif. p. 27. 



far. /, pijgmai'um (Ser. 1. c.) stems almost simple ; head 

 solitary, terminal. Native of the Pyrenees, about Prades. 



Hair;/ Trefoil. Fl. July, Aug. Clt. 1817. PI. ^ to 1 foot. 



64 T. POLYCE'PIIALUM (Ser. mss. in D. C. prod. 2. p. 196.) 

 plant hairy, prostrate ; leaflets cuneate-obovate, entire ; stipulas 

 lanceolate, the cauline ones free ; heads of flowers very numer- 

 ous, ovate ; calyx very hairy, the segments nearly equal and 

 flexile, shorter than the corolla; vexillum length of corolla; le- 

 gume villous, 2-seeded ; seeds cordate-reniform. I/. G. Na- 

 tive of the Cape of Good Hope. Perhaps T. lanatum of Thunb. 

 prod. 136. 



Many-headed Trefoil. PI. prostrate. 



65 T. PAUCIFLORUM (d'Urv. enum. pi. arch. p. 94.) stems trail- 

 ing, villous, much branched at the base ; petioles very long ; 

 leaflets cuneated, very much dilated at the apex, usually emar- 

 ginate, entire ; stipulas scarious, ciliated, subulate at the apex ; 

 spikes solitary or twin, few-flowered, on short peduncles ; 

 calyxes villous, the segments setaceous, and shorter than the 

 corolla. $ . H. Native of Turkey, near Constantinople. Flowers 

 purple. 



Fern-flowered Trefoil. PL trailing. 



66 T. HUMBO'IDTII (Spreng. syst. 3. p. 213.) heads some- 

 what umbellate, 8-flowered ; calyxes hairy, at length deflexed, 

 the teeth lanceolate, shorter than the corolla ; stipulas oblong- 

 lanceolate, nerved ; leaflets obovate-roundish, denticulated, 

 nerved. Q. H. Native of Quito. T. pauciflorum, Willd. herb. 



Humboldt's Trefoil. PL prostrate. 



67 T. CHERLE'RI (Lin. amcen. 4. p. 286.) stem procumbent ; 

 leaflets obcordate, nearly entire ; stipulas broad, ending each in 

 a linear incurved point ; heads globose, hispid, sessile : stipulas 

 roundish ; calycine segments hispid, longer than the corolla ; 

 seeds ovoid, compressed. O- H. Native of the south of Europe. 

 Savi, obs. trif. p. 23. Barrel, icon. 859. Desf. atl. 2. p. 197. 

 Flowers white. 



Chcrler's Trefoil. FL May, June. Clt. 1750. PL procum- 

 bent. 



68 T. SPHJEROCE'PHALON (Desf. fl. atl. 2.p, 201. t. 209. exclu- 

 sive of the synonyme of Barrelier,) stems diffuse ; leaflets obcor- 

 date or obovate ; stipulas lanceolate, acute ; heads of flowers glo- 

 bose, hispid, sessile, involucrated ; calycine segments setaceous, 

 longer than the corolla. O- H. Native of the north of Africa, 

 near Mascar. Flowers white. Plant villous. 



Round-headed Trefoil. Fl. June, July. Clt. 1820. PL foot. 



69 T. ROTUNDIFOI.IUM (Smith, fl. grtec. t. 747.) stems simple, 

 diffuse ; leaflets nearly orbicular, toothed, hairy ; calyx very 

 hairy, longer than its teeth, which are short, lanceolate, and up- 

 right : heads of flowers globose, terminal, with lanceolate brac- 

 teas. O- H. Native of the Morea. Corolla twice the length 

 of the calyx, elegantly variegated with pale purple and white ; 

 its petals distinct ; germ hairy. The whole plant clothed with 

 white hairs. 



Hound-leaved Trefoil. Fl. May, July. PL J foot. 



70 T. GLOBOSUM (Lin. spec. 1081.) plant very villous; stems 

 diffuse, slender, branched ; leaflets obovate-cuneiform, some- 

 what denticulated ; stipulas lanceolate, nerved ; heads of flowers 

 globose, villous, stalked ; the superior calyxes destitute of a 

 corolla, the lower ones about equal in length to the corolla ; 

 seeds egg-shaped, compressed, large, black. O- H. Native of 

 Syria, Arabia, and Italy. Savi, obs. trif. p. 16. Flowers white. 



G/oftoi-e-headed Trefoil. Fl. June, Aug. Clt. 1713. PL 

 diffuse, 4- foot. 



