ZO te Leguminaceae 
O. Upper lip of the calyx slightly 2-toothed. E. 
L, sericeus Pursh 
OO. Upper lip of the calyx cleft for 1,—2/3 its length. 
P. Plant 2—4 dm. high; not tomentose nor villous. E. 
L. erectus Hend. 
PP. Plant 6—9 dm. high; somewhat tomentose and villous. E. 
(L. leucophyllus plumosus.) 
L. leucophyllus Doug!. 
MEDICAGO MWDIC 
Herbs (ours). Leaves small, 3-foliolate; stipules often incised: leaflets usually 
dentate, pinnately veined. Flowers small, yellow or violet, in axillary heads or spikes. 
Calyx-teeth short, nearly equal. Standard obovate or oblong; wings oblong; keel obtuse. 
Stamens diadelphous, 10, in groups of | and 9. Pod curved or spirally twisted, reticulate 
or spiny, indehiscent. Seeds | to few. (Gk. medike—the alfalfa; because the Greeks 
got this from Media.) 
A. Perennial, 5—-12 dm. high; flowers violet, in spikes about 6 cm. long. W. E. 
M. sativa ee (Alfalfa) ° 
AA. Annual, 1.5—6 dm. high; flowers yellow, in heads about 2 cm. long. 
B. Pod several-seeded, spiral, spiny on the edges. W. E. 
M. denticulata Willd. (Bui Clover) 
BB. Pod |-seeded, curved, not spiny. W. E. 
M. lupulina L.  (None-such) 
MELILOTUS MELILOT 
Herbs, annual or biennial. Leaves petioled, 3-foliolate; leaflets dentate. Flowers 
small, white or yellow, in slender racemes. Calyx-teeth short nearly equal. Standard 
obovate or oblong; wings oblong; keel obtuse. Stamens diadelphous, in groups of 9 
and 1, Pod ovoid or globose, straight, indehiscent or finally 2-valved. Seeds 1—few. 
(Gk. meli=honey, lotos—some plant of this family; the flowers are prolific in honey. ) 
A. Flowers white. E. M. alba Desv. (Sweet Clover) 
AA. Flowers yellow. 
B. Leaflets obtuse, toothed from near the base; petals 6—9.mm. long. E. 
M. officinalis Lam. (Yellow Melilot) 
BB. Leaflets truncate or emarginate, toothed above the middle; petals 22.5 mm. 
long.. E: M. indica All. (Small Melilot) 
TRIFOLIUM CLOVER 
Herbs. Leaves normally 3-foliolate, in a few species 5—-7-foliolate; leaflets denti- 
culate; stipules adnate to the petiole. Flowers purple or red or pink or white or yellow, 
in dense heads or spikes. Calyx-teeth nearly equal. | Petal-claws adhering to the sta- 
men-tube. Stamens diadelphous in groups of 9 and 1, or monadelphous by only the 
partial separation of the 1. Pod oblong or terete, often enclosed in the calyx, mem- 
brancus, indehiscent or at last dehiscent by | suture. Seeds I—6. (L. tres=3, fo- 
lium—leaf. ) ; 

A. Leaflets 3—7 but always some leaves with 5-7; heads without involucre. 
B. Leaflets 5—7; flowers 2—3 cm. long. E. (T. megacephalum. ) 
T. macrocephalum Poir. (Long-flowered Clover) 
BB. Leaflets 3—5; flowers 6—8 mm. long. E. 
T. plummerae Wats. 


