ORt)Eii 46.— LEGUMINOUS PLANTS. 



197 



Leaves pinnatelj trifoliate. 



seeded, longer than the permanent calyx. 

 Flowers in racemes. 



1 M. officina'lis. Yellow M. Leaflets obovate-oblong, obtuse, dentate. Calyx half 



as long as the yellow corolla. Pod 2-seeded. Stem 3f. 



2 M. alba. White M. Leaflet.s ovate-oblong, square at end. Calyx not half as long 



as the white corolla. Pod 2-seeded. Height 4-r)f, Very fragrant. 



5. TRIFO'LIUM. Clover. Trefoil. 



Calyx 5-cleft, with bristly teeth, persist- 

 ent. Petals more or less united at the base, 

 persisteiit and withering. I^anner longer 

 than the wings, which are also longer than 

 the keel. Stamens 10, diadelphous (9 & \). 

 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. Aiir.-Sept. 



* Flowers yellow, in small, 

 Pod 1-seeded 1, 2 



dense, oval heads. 



Fig, 447. Eed Clover,— a liead of 

 flowers. Fig. 448. A single flower. 

 Fig. 4-19. A pod, with a part of the 

 calyx. Fig. 450. A seed, cut open. 

 See also Fig. 37. 



Flowers cyanic (not yellow) a 



a Flowers on little stalks (pedicels) and 



finally deflexed b 



a Flowers nearly or quite sessile, never de- 

 flexed c 



b Heads small, on stalks some ten times longer. . . .3, 4 



b Heads large, on stalks two or three times longer 5, 6 



c Calyx teeth feathery, longer than the whitish corolla 7 



c Calyx teeth shorter than the purple or roseate corolla 8-10. 



T. procum'bens. Yellow C. Stipules much shorter than the petioles. Style 3 or 



4times shorterthan thepod. Heads ovate, 4 in. thick. Stems prostrate. May. 



T. agra'rium. Larger Yellow C. Stipules longer than the petiole. Style about 



as long as the pod. Heads oblong, i in. thick. Stems ascending. June., July. 



3 T. Carolinia'num. Southern C. Stipules leaf-like. Calyx teeth thrice longer 



than its tube. Legume 4-8eeded. Scarcely forms a turf. W. S. 



4 T. repens. White C. Shamrock. Stipules narrow, scale-like. Calyx teeth 



shorter than its tube. Pod 4-8eeded. Forms a dense turf. Fls. white, c. 

 T. reflexum. Buffalo C. Lflts. obovate. Calyx nearly as long as the red corolla. 

 T. stoloni'ferum. Prairie G. Leaflets obcordate. Calyx not half as long as the 

 white corolla. W. 



