LEGUMINIFERZ. 47 
It varies much in the quantity of pubescence, the number and direc- 
tion of the stems, the degree of denticulation in the leaflets, and the 
length of the hairs in the calyx, and has consequently been divided 
by Mons. Jordan into a number of species, several of which to 
me appear scarcely even deserving of the name of varieties; but 
his 'T. gracile, T. rubellum, and possibly T. arenivagum, of which 
I have seen no British specimens, may be distinct as sub-species. 
Hare’s-foot Trefoit. 
French, 7'refle des Champs. German, Acker Klee. 
SPECIES IX.—_TRIFOLIUM BOCCONL. Swi. 
Puate CCCLYV. 
Rootstock none. Stems several or solitary, erect or ascend- 
ing, generally simple. Leaflets obovate or oblanceolate, strongly 
denticulate in the upper half, and having the veins very promi- 
nent ; the lateral veins straight. Stipules adnate for about half 
their length, with the free portion triangular-subulate ; the upper 
ones, which embrace the flower-heads, only slightly dilated. Flower- 
heads terminal and axillary, sessile, the terminal ones mostly in 
pairs, ovoid or sub-globose, at length eylindrical-ovoid. Calyx-tube 
oblong, strongly 10-nerved, slightly swollen in fruit, with an indis- 
tinct callous ring. Teeth triangular, spinescent, with a strong 
nerve; the four upper ones nearly equal, three-fourths the length 
of the tube; the lower one equalling it. Plant more or less hairy. 
On the tops of (turf?) walls and in dry places. Very rare. At 
Cadgwith and Landewednack near the Lizard, Cornwall. 
England. Annual. Summer. 
Stems in the British specimens which have passed through my 
hands only 1 inch high, but in Continental specimens sometimes 
6 or 8 inches long. Leaves shortly stalked, the leaflets + to 4 inch 
long, with the nerves very prominent beneath. Heads + to 2 inch 
long, densely flowered. Flowers 4 inch long, white tinged with 
pink. Corolla very slightly exceeding the calyx. Pod small, en- 
closed in the nearly unaltered calyx. Seed sub-globular, yellow, 
smooth. Plant rather rigid, dull-green, often with a reddish tinge. 
Of this species I have seen very few British specimens, and no 
living examples. It cannot be confounded with any of our species 
except the following. 
Boccone’s Trefoil. 
French, Tréfle de Boccone. 
