120 LEGUMiNosiE. [TrifoUum. 



longer than the 2 upper, all subulato-acuminate, with spine-like lips, not at all 

 spreading or reflexed in seed, the mouth of the calyx contracted and thickened 

 internally into a sort of hairy ring. Corolla longer than the calyx, pale rose- 

 coloured without stris, sometimes nearly white, much narrowed and elongated 

 backwards ; wings and keel equal. Legume enclosed in the whitish or brownish 

 ventricose calyx, very thin and chaffy, subglobose, tipped with the deflexed not 

 straight style. Seed solitary, oval or ovato-rotundate, brownish yellow, slightly 

 rugose and quite glabrous. 



The specific name refers to the strongly ribbed or striated calyx. The figure 

 of this speeies in ' English Botany' has the leafiets drawn too distinctly serrated. 



6. T. scabrum, L. Rough Rigid Trefoil. Heads of flowers 

 terminal and axillary sessile ovate, calyx tubuloso-campanulate in 

 seed, its teeth unequal triangular lanceolate very rigid 1 -nerved 

 at length patent, leaflets obcordate serrulate their veins very pro- 

 minent upwards and curving towards their marginal termination 

 rather distant, stems procumbent. Br. Fl. p. 102. E. B. t. 

 903. 



In similar places, and often in company with the last; perhaps rather more 

 frequently observable. /^Z. May —July. 0. 



E. Med. — On the Dover, Hyde, in tolerable plenty. On dry pasture-ground at 

 E. Cowes, along the shore below Statwood. By the Rope-walk, E. Cowes, Miss 

 G. Kilderbee. On St. Helen's spit. 



W. Med. — Down by Freshwater, first noticed by Mr. D.Turner, Mr.D. Snooke. 

 In Thorness bay, Rev. W. H. Coleman. Abundantly at Norton, on the turf nearly 

 opposite Mrs. Mitchell's and Sir Graham Hamond's. 



Legume extremely minute, shorter even than the tube of the very much hard- 

 ened calyx, and which consequently retains it more firmly than in T. striatum ; 

 very thin and membranous, tipped with the style, filled with the solitary, oblong, 

 somewhat compressed, bright yellow and very smooth seed, which is scarcely half 

 as broad or thick as in T. striatum. 



Smith and Curtis (Fl. Lend.) describe the calyx-teeth as recurved in seed, and 

 the latter quotes Vaillants excellent figure (Bot. Par. t. 33, fig. 1), but both that 

 and Curtis's own plate represent them as little more than spreading or patent, 

 certainly not, as Koch declares, bent back like a bow (in einem Bogen abstebenil). 

 In all my fine and numerous fresh specimens the calyx-teeth are mostly patent, 

 or at farthest somewhat spreading, never decidedly recurved, though the ■points 

 only of a few teeth here and there are slightly bent backwards. 



This and the preceding species have a great general resemblance to each other, 

 and their characters, as laid down in our standard British works, scarcely enable the 

 young botanist to distinguish them with certainty. I have for this reason altered 

 the specific definition of Smith and Hooker, and inserted the excellent characters 

 of Koch (in Rohling's ' Deutschland's Flora'), taken chiefly from the mode of ner- 

 vation in the leaves. The following differences are observable in the two species; 

 — T. striatum and T. scahrum are both rigid, especially in seed, but the former is 

 always more stiff and wiry in its stems than the latter ; the heads of flowers and 

 the whole plant smaller and more slender. When in fruit the calyx is perhaps 

 equally rigid in both, but the much broader triangular-lanceolate teeth of T. sca- 

 brum, whose tubular campanulate calyx is also coloured, will serve to distinguish 

 it in that state from the pale, bleached, ventricose calyx of T. striatum, the teeth 

 of which, though equally erect, are very narrow or subulate, with few finer and 

 more slender points. The character of Koch, taken from the size and direction 

 of the veins on the leaflets, is excellent, and will help to distinguish the two plants 

 at any period of growth. 



7. T. glomeratum, L. Smooth Round-headed Trefoil. Heads 

 terminal and axillary sessile globose, calyx-teeth ovate very acute 



