190 



LEGUMINOS^E. LXX. TRIFOLIUM. 



pulas leafy, ending each in a long, narrow acumen ; heads of 

 flowers subglobode, axillary ; flowers on short pedicels, the pe- 

 dicels deflexed when in fruit ; calycine segments about equal, 

 triquetrous, longer than the tube, ascending, shorter than the 

 corolla ; legume 2-seeded : seeds minute, ovate, compressed, 

 black, i;. H. Native of Europe. T. Vaillantii, Poir. diet. 

 8. p. 4. exclusive of the synonyme of Micheli. Vaill. hot. par. 

 t. 22. f. 1. Flowers pale-red or white. Plant creeping. 



Elegant Trefoil. Fl. Ju. Sept. Clt. 1823. PI. -J- to | ft. spr. 



107 T. ISTHMOCA'RPON (Brot. phyt. p. 148. t. (il.) stems pros- 

 trate and ascending ; petioles much shorter than the peduncles ; 

 leaflets obovate, obtuse, serrulated, villous ; stipulas broad, 

 nerved, subulate ; heads of flowers ovate ; flowers sessile ; ca- 

 lycine segments equal, erect, small, shorter than the corolla, 

 which is somewhat falcate ; legume 2-3-seeded; seeds somewhat 

 reniform, of a yellowish-grey colour. O- $ ? H. Native of 

 Portugal. Legume membranous, coarctate in the middle from 

 spongy substance. Flowers pale-purple. 



Neck-fruited Trefoil. PL ascending, ^ foot. 



108 T. REFLE'XUM (Lin. spec. 1079.) plant pilose ; stems 

 ascending ; leaflets obovate, serrulated ; stipulas foliaceous, ob- 

 liquely-cordate, acuminated ; heads of flowers globose, axillary ; 

 flowers on long pedicels, at length deflexed ; calycine segments 

 nearly equal, very narrow, 1 -nerved, nearly twice the length of 

 the tube, but shorter than the corolla, y.,1 H. Native of Vir- 

 ginia. Flowers purple. Heads of flowers nearly twice the size 

 of those of T. elegans. Legumes usually 3-seeded. 



/?c/e.m/-flowered Trefoil. Fl. Ju. Aug. Clt. 1 794. PI. pr. 



109 T. CAROLINIA'NUM (Mich. fl. bor. amer. 2. p. 58.) plant 

 small ; leaflets roundish, obcordate, ciliated ; heads pedunculate, 

 reflexed, few-flowered ; calycine segments straight, linear, shorter 

 than the tube ; corolla white, hardly exserted beyond the calyx ; 

 legume usually 3-seeded. 1.?H. Native of Carolina. 



Carolinian Trefoil. PI. |- foot. 



110 T. MONTA'NUM (Lin. spec. 1087.) plant pubescent ; stem 

 erect, nearly simple ; leaflets lanceolate-oblong, obtuse, denti- 

 culated, thickly beset with nerves ; stipulas lanceolate, very 

 acute ; heads of flowers nearly globose, axillary, pedunculate, 

 but at length oblong ; flowers almost sessile, crowded, spreading, 

 at length reflexed ; calycine segments unequal, narrow, length 

 of tube, but shorter than the carina ; legume 1-seeded ; seed 

 ovate-roundish. If. . H. Native of Europe, in mountain mea- 

 dows. Savi, obs. trif. 100. Sturm, deutschl. fl. 1. fasc. 15. 

 Fl. dan. 1172. Flowers white. 



Var. ft, pedunculosum (Ser. mss. in D. C. prod. 2. p. 201.) 

 heads of flowers globose, solitary, on long peduncles, thicker ; 

 calyxes larger. 



Var. y, incanum (Ser. 1 c.) stem, peduncles, and lower surface 

 of leaves clothed with hoary pili. Native of Bessarabia. 



Mountain Trefoil. Fl. June, Aug. Clt. 1786. PI. i to 1 ft. 



111 T. BALBISIA'NCM (Ser. mss. in D. C. prod. 2. p. 201.) 

 plant villous ; stems tufted, simple ; leaflets elliptic, obtuse, 

 denticulated, much nerved ; stipulas lanceolate, acute ; heads of 

 flowers hemispherical, terminal, solitary ; peduncles much longer 

 than the stamens ; flowers ascending, purple ; calycine segments 

 equal, spreading, narrow, much longer than the cylindrical tube, 

 and shorter' than the carina. If. . H. Native of Provence, on 

 Mount Lachen. 



Balbis's Trefoil. PI. j- to 1 foot. 



112 T. RUPE'STRE (Tenore, ex Gussone, in herb. Dunant. 

 D. C. prod. 2. p. 201.) stems erect, simple; leaves nearly all 

 radical ; leaflets oval, denticulated, much nerved ; stipulas mem- 

 branous, acuminated ; peduncle striated, pilose, terminal, length 

 of stem ; flowers capitate, depressed, at length deflexed ; calyx 

 rather coriaceous, having smooth, blackish-green angles ; the 

 teeth or segments narrow, parallel, equal, longer than the tube. 



y. . H. Native of Calabria, on Mount Corno. Flowers white. 

 Allied to T. montanum. 



Rock Trefoil. Fl. June, July. Clt. 1 820. PI. 1 foot. 



113 T. Pii.ETLTiA\MM (Guss. pi. rar. 308.) clothed with soft 

 and dense pili ; stems tufted and ascending ; leaflets oval, entire, 

 or denticulated, finely veined towards the margins ; stipulas 

 narrow, ending in a long, bristle-like acumen ; heads of flowers 

 globose, solitary, bracteated by a stipule ; tube of calyx lined 

 with pili ; the segments awl-shaped and parallel, unequal, having 

 the throat filled with white pili. 1.H. Native of the higher 

 mountains of Aprutia, on Mounts Corno and Cortone. Stems 

 3 inches high. Flowers reddish. 



Prtiteim Trefoil. PI. \ foot. 



114 T. LATINUM (Seb. pi. rom. fasc. 1. pt. 7. t. 1. f. 2.) stem 

 erectish, dichotomous ; leaflets lanceolate, acuminated, nearly 

 entire ; stipulas narrow, nerved, pilose, linear, acute ; heads of 

 flowers on long peduncles, oval ; calycine segments between 

 triangular and subulate, ciliated, lowest one very long, but 

 shorter than the tube of the corolla ; legume membranous ; 

 seeds somewhat turbinate. ^.H. Native near Rome. The 

 whole plant is very soft and beset with small short pili. Flowers 

 red or white. 



Latin Trefoil. Fl. June, July. Clt. 1825. PI. | foot. 



SECT. V. VESICA'STRUM (from vesica, a bladder, and aslrttm, 

 an affixed signification, like ; in reference to the calyxes in all 

 the species of this section being inflated after flowering). Ser. 

 mss. in D. C. prod. 2. p. 202. Flowers disposed in dense heads ; 

 under lip of calyx remaining unchanged, but the upper one, 

 after flowering, becomes increased and inflated, and covers the 

 legume in a kind of arched manner. Nerves in the leaves nu- 

 merous. 



115 T. SUBTERRA'NEUM (Lin. spec. 1080.) villous; stems 

 procumbent ; leaflets obcordate, entire ; stipulas lanceolate, 

 broad, acute ; heads few-flowered, usually 3-4, piercing the 

 ground when in a seeding state ; the lower flowers fertile having 

 the calyx inflated ; upper flowers sterile, empty, elongated, 

 deflexed; legume 1-seeded; seed ovate, black. O- H. Na- 

 tive of Europe ; plentiful in Britain, in dry gravelly pastures, 

 and on barren heaths and exposed places, as on Black-heath, 

 Greenwich-park, Hyde-park, &c. Savi, obs. trif. 12. Smith, 

 engl. bot. 1048. Curt. lond. 1. t. 54. Flowers white or very 

 pale red. Involucrum central, reflexed, stiff", starry, embracing 

 the fruit. 



Subterraneous Trefoil. Fl. May, Aug. Brit. PI. pr. 



116 T. VESICULOSUM (Savi, fl. pis. 2. p. 165. obs. trif. 84.) 

 stems erect, firm, striated ; leaflets lanceolate, acute, sharply 

 serrulated ; stipulas narrow, rather membranous, ending each 

 in a long acumen ; heads of flowers ovate, thick, on long pedun- 

 cles ; calyxes scarious, inflated ; the segments subulate and very 

 acute, equal, much shorter than the corolla ; legumes 2-seeded ; 

 seeds ovate, compressed, yellow. Q. H. Native of the south 

 of Europe. T. recurvum, Walds. et Kit. pi. rar. hung. 2. p. 

 179. t. 165. and T. turgidum, Bieb. 1. c. and suppl. Flowers 

 reddish. 



Bladdery-ca\yaeA Trefoil. Fl. Ju. Jul. Clt. 1805. PL ft. 



117 T. AMBIGUUM (Bieb. fl. taur. 2. p. 208.) stems creeping; 

 leaflets ovate, bluntish, serrulated ; heads dense, double the 

 size of those of T. repens ; calyx striated ; the teeth nearly 

 equal, subulate, and divaricate ; vexillum lanceolate ; legume 

 1-2-seeded. If.. H. Native of Tauria and Caucasus in mea- 

 dows, and on the lower Volga. The barren stems creeping and 

 tufted, the floriferous ones erect. Flowers pale-red. 



f'ar. /3, ccemlescens (Bieb. fl. taur. suppl. 507.) corollas bluish. 

 Native of the south of Tauria. 



Ambiguous Trefoil. Fl. June, July. Clt. 1815. PL | foot. 



