114 
Papilionacese. 
3. Wings longer than the keel. Pods glabr. Stems ascend¬ 
ing, 3—6 dm. M. officinalis Desr.—Road-sides, rubbish- 
heaps; almost everywhere. 7 . . arvensis Wallr. 509. 
Wings as long as the keel. Pods with applied pubes¬ 
cence. Stems almost erect, taller than in the last. M. ma- 
crorrhizaKoch.—Rather damp, gravelly places; distrib. 7 
altissima Thuill. 510. 
144. Trlfolium. Clover. XVII, 7. 
1. FIs red, white or yellowish white ... 2 
— FIs yellow, becoming brown at a later period . 21 
2. FIs sessile or very shortly pedicelled (pedicelled in a 
monstrous form of T. pratense!) . ... 3 
— FIs with long or short pedicels .... 15 
3. Cal. swollen out like a bladder after flowering, net- 
veined. (FIs rose-coloured) ..... £ 
Cal. not swollen out like a bladder after flowering 5 
4. Stem prostrate and rooting. FIs not inverted.—Damp 
pasturages, road-sides; distrib. 6 . fragiferum L. 511. 
— Stem ascending, not rooting. FIs inverted (the standard 
lowest).—Southern Europe; waste-ground near Geneva 
and Zurich (adventitious). 6 . * resupinatum L. 512. 
5. Stems and Is glabr. (occasionally rather hairy). Heads 
oblong-cylindric. FIs purple.—Wooded hills; distrib. 
but not common. 6 rubens L. 513. 
— Stems and Is more or less hairy . ... 6 
6 . Cal. as long or longer or very slightly shorter than the 
cor. (Cor. whitish or pale rose-coloured) . . 7 
— Cal. distinctly shorter than cor. (in 518 only Vs shorter) 10 
7. Heads long-cylindric, very villous, unprotected at the 
base (without invol. bracts), those of the axils peduncled. 
—Meadows, distrib. 7 arvense L. 514. 
Heads globular or ovoid, surrounded at the base by in¬ 
vol. bracts, almost all sessile . ... 8 
8 . Cal.-teeth erect at maturity. Leaflets with scarcely-visible 
lateral nerves.—Alp.; W. (Simplon, Saas, Nicolaithal). 7 
saxatile All. 515. 
— Cal.-teeth spreading at maturity. Leaflets with very dis¬ 
tinct lat. nerves ....... .9 
9. Lateral nerves of the leaflets fairly straight (towards 
the edge). Tube of the fr.-cal. swollen out, with subulate, 
spreading teeth. — Dry; stony places, rare; W. Y. J. 6 
striatum L. 516. 
— Lat. nerves of the leaflets thickened towards the edge 
and arched outwards! Tube of the fr.-cal. tubular, 
scarcely swollen, the teeth lanceolate-subulate, stiff, curved 
outwards. — As the last; T. W. V. J. 6 scabrum L. 517. 
