46 ENGLISH BOTANY. 



the cliffs from Kynance to Cadgwith, a distance of six miles."— 

 (Borrer, in Eng. Bot. Sup.) 



England. Annual. Spring and early Summer. 



Extremely like T. eu-incarnatum, of which it may possibly be 

 merely the wild form, though constantly differing in its pale flowers. 

 Stem shorter, and stouter in proportion to its length, with the 

 hairs more adpressed. Calyx-teeth rather broader, and their 

 l)oints mostly glabrous. Both forms remain constant in cultiva- 

 tion, unlike the cultivated variety of T. pratense, which reverts in 

 time to the ordinary wild state. 



BalU's Trefoil. 



French, Trefle de Balbi. 



SPECIES VIII.— T RIPOLIUM ARVENSE. Linn. 

 Plate CCCLIV. 



Rootstock none. Stems several, ascending, branched. Leaf- 

 lets elliptical- or oblanceolate - strapshaped apiculate, entire or 

 toothed in the upper portion. Stipules adnate for less than half 

 their length, with the free part elongated, setaceous. Leaves 

 all opposite. Flower-heads terminal and axillary, stalked, ovoid, 

 ovoid-cylindrical, or sub-globose. Calyx-tube bell-shaped, faintly 

 10-nerved, softly hairy, the throat having a slightly-elevated ring 

 with long distant hairs which do not close its mouth ; teeth 

 setaceous, longer than the tube, nearly equal, plumose, erect, not 

 altered in fruit. Corolla shorter than the calyx-teeth. Plant more 

 or less hairy. 



On dry pastures, downs, and sandy places. Not uncommon, 

 and generally distributed, except in the extreme North of Scotland. 



Stems numerous, 3 inches to 1 foot high, branched in the larger 

 examples. Leaves numerous, very shortly stalked, the leaflets \ to 

 7j inch long. Stipules \ to \ inch long, the greater part free and 

 very slender, with a few parallel veins. Elower-heads ^ to 1 inch 

 long, very dense, shortly stalked, terminating all the branches, and 

 a lew of them on peduncles from the axils of the leaves, the ter- 

 minal ones sometimes appearing to be in pairs, from the uppermost 

 of the axillai-y ones being situated very near it. Elowers \ inch 

 long, white, turning to flesh-colour. Calyx-teeth very slender, 

 erect, and with long soft hairs. Seeds sub-globose, smooth. Plant 

 greyish-green, often tinged with red or purple. 



This species is easily distinguished by its soft plumose heads ; 

 the leaves also are sub-fasciculate, those from the axils of which a 

 branch is not produced having 1 or more smaller leaves in its place. 



