* Flowers purple or red.
T. pratense: stems decumbent or nearly erect, 1-2 feet long, hairy; stipules large, ovate, bristle-pointed; leaflets obovate or obcordate; flowers reddish-purple, in dense terminal ovoid or globular heads, with two sessile, trifoliolate leaves close at their base. - Meadows and pastures. Fl. May to September.
T. medium: stems ascending zigzag; stipules linear-lanceolate; leaflets elliptical or lanceolate; flower-heads always more or less pedunculate above the last floral leaves; the corolla larger than in the last, brighter and richer coloured. - Open woods and bushy pastures. Fl. June to September.
T. striatum: annual; small, tufted, spreading, covered with soft hairs; stipules ovate, ending in a fine point; leaflets obovate; flower-heads small, ovoid or globular, chiefly terminal and closely sessile within the last leaves; calyx softly, hairy, with short, subulate teeth, which remain erect after flowering; corolla very small and pale red. - Dry pastures, banks, and waste places. Fl. June, July.
T. fragiferum: stem creeping; leaflets obovate, emarginate, finely serrated; stipules ovate, with a long point; flower-head globose on long axillary peduncles, very compact, often assuming a pink tint, so as to have been compared to a strawberry; corolla small and red; calyx, after flowering, much inflated, - Dry meadows and pastures. Fl. July, August.
** Flowers white or whitish.
T. arvense: annual; stems slender, branching, erect, seldom reaching a foot in height, clothed with short soft hairs; stipules and leaflets narrow; flowers small, in pedunculate heads, which are at first nearly globular but soon become oblong or cylindrical, appearing very soft and feathery owing to the fine hairy teeth of the calyx projecting beyond the corolla. - Sandy cornfields. Fl. July to September.
T. scabrum: stems procumbent, less hairy than T. striatum; leaflets obovate; stipules ovate, with a fine point; flower-heads ovate, sessile, terminal, and lateral; the flowers small, whitish; calyx-teeth lanceolate, spreading or recurved after flowering. - Dry pastures and waste places. Fl. May to July.
T. repens; stems creeping and rooting, glabrous; stipules small; leaflets obovate, distinctly toothed, usually marked in the centre, the leafstalks often very long; peduncles axillary, long, and erect, bearing a globular head or umbel of white flowers, the pedicels recurved after flowering. - Dutch Clover. - Meadows and pastures. Fl. May to September.
*** Flowers yellow. T. agrarium [procumbens of authors): annual; stems slender, much branched at the base, glabrous or slightly downy, procumbent or nearly erect, 1/2-1 foot long; stipules broad, pointed; leaflets obovate or obcordate; flower-heads loosely globular or ovoid, on rather long axillary peduncles, containing 30-50 small yellow flowers, which in fading become reflexed, and turn pale brown. - Dry pastures, borders of fields, etc. Fl. June to August.
T. procumbens (minus of authors): annual; resembling the last, but more slender and procumbent; flowers smaller, 12-20 in a head, paler yellow. - Dry pastures. Fl. June, July.
T. filiforme is a still more slender plant, with the stems decumbent, ascending, or erect, seldom six inches long; the leaflets narrower; and the flowers 2-3, rarely 5-6, in each head. - Sandy or stony pastures in south-eastern England, but rare. [See also p. 51.]