LEGUMINIFER.E. 53 



tlmn in the prccetling species. Heads } to | inch long, on stalks 

 from J to 1 inch in lonyth, with a small white inemhranous I'rilU 

 like involucre immediately below the ilowers, not much exceeding 

 the width of the pedicel. Flowers ^ inch long, pale purplish rose- 

 colour. Calyx very strongly ribbed, with slender almost subulate 

 teeth ; standard Avithering, not retaining its shape. Pod ovoid, 

 swollen, protruding from the calyx-tube. Plant lively green, 

 glabrous. 



The more or less upright stems and stalked heads of purplish 

 flowers, with the pods protruding from the swollen ovoid calyces 

 when ripe, at once distinguish this rare species. 



Upright Itound-headed Trefoil. 



French, Tnjle Ralde. 



SPECIES XV.— TRIPOLI UM HYBRIDUM. Linn. 



Plate CCCLXI. 



Rootstock many-headed. Stems erect, or decumbent only at the 

 base, not rooting at the nodes, branched. Lower leaves on long 

 upper ones on short stalks ; leaflets oval or obovate, rounded 

 at the apex, finely denticulate at the margins. Stipules oblong, 

 adnate for less than half their length, with the free portion nar- 

 rowly triangular. Flower-heads all axillary, on stalks much ex- 

 ceeding their own length and longer than the leaves from which 

 they spring, solitary, depressed-globular. Flowers on pedicels as 

 long as or longer than the calyx, reflexed after flowering. Calyx- 

 tube bell-shaped, bulging at the base on the upper side, faintly 

 nerved ; teeth nearly equal, subulate, about as long as the tube, 

 unaltered in fruit. Corolla more than twice as long as the calyx, 

 becoming scarious and striate when covering the pod. Pod 2- to 

 4-seeded, longer than the calyx-teeth. Plant sub-glabrous. 



Var. a, genuina. 



T. hyhiiflum, Koch, Syn. Fl. Germ, et Helv. ed. ii. p. 192. Gr. <fe Godr. Fl. de Fr. 

 Vol. I. p. 420. 



Stems stout, hollow. Stipules few-nerved. Heads of flowers 

 large. 



Var. /3, elegans. 



T. elegans, Savi. Koch (1), Syn. Fl. Germ, et Helv. ed. ii. p. 193. Gr. 6i Godr. R 

 de Fr. Vol. I. p. 420. 



Stem weak, decumbent at the base, solid. Stipules several- 

 nerved. Leaves more sharply denticulate, and heads of flowers 

 smaller than in var. a. 



