OxpEr 46.—LEGUMINOUS PLANTS. 191 
seeded, longer than the permanent calyx. Leaves pinnately trifoliate. 
Flowers in racemes. 
1 M. officinalis. Yellow YU. Leaflets obovate-oblong, obtuse, dentate. Calyx half 
as long as the yellow corolla. Pod 2-seeded. Stem 8f. 
2M. alba. White i Leaflets ovate-oblong, square at end. Calyx not half as long 
as the white corolla, Pod 2-seeded. Height 4-6f Very fragrant. 
5. TRIFO’LIUM. Clover. Trefoil. 
Calyx 5-cleft, with bristly teeth, persist- 
ent. Petals more or less united at the base, 
persistent and withering. Banner longer 
than the wings, which are also longer than 
the keel. Stamens 10, diadelphous (9 é& 1). 
Legume short, membranous, often included 
in the calyx, 1-6-seeded, mostly indehis- 
cent. — Herbs with palmately trifoliate 
leaves. Leaflets straight-veined. Flowers 
in heads or spikes. Apr.—Sept. 
* Flowers yellow, in small, dense, oval heads. 
Pod i-seeded....1, 2 : 
* Flowers cyanic (not yellow)....4 ig, tat, Med Clover, ahead of 
P a flowers. Fig. 448. A single flower. 
a Flowers on little stalks (pedicels) and Fig. 449. A pod, with a part of the 
finally defiexed. ee “B : calyx, Fig. 450. A seed, cut open. 
a Flowers nearly or quite sessile, never de-  §¢¢ also Fig. 87. 
flexed....¢ 
b Heads small, on stalks some ten times longer... .3, 4 
b Heads large, on stalks two or three times longer....5, 6 
ce Calyx teeth feathery, longer than the whitish corolla....7 
e Calyx teeth shorter than the purple or roseate corolla... .8-10. 
1 T. procum’bens. Yellow C. Stipules much shorter than the petioles. Style 3 or 
4 times shorterthanthepod. Headsovate, $in. thick. Stems prostrate. May. 
2 T. agra‘rium. Larger Yellow C. Stipules longer than the petiole. Style about 
as long asthe pod. Heads oblong, din. thick. Stemsascending. June, July. 
8 T. Carolinia’num. Southern C. Stipules leaf-like. Calyx teeth thrice longer 
than its tube. Legume 4-seeded. Scarcely forms a turf. W.S. 
4 T. repens. White C. Shamrock. Stipules narrow, scale-like. Calyx teeth 
shorter than its tube. Pod 4-seeded. Forms a dense turf. Fils. white. ¢ 
T.reflexum. Buffalo C. Lfits. obovate. Calyx nearly as long as the red corolla. 
6 T. stoloni’feram. Prairie C. Leaflets obcordate. Calyx not half as long as the 
white corolla, W. 
