Feb., 1915.] 
Clovers of Ohio. 
445 
Melilotus (Toum.) Mill. 
Annual or biennial herbs with small white or yellow flowers 
in slender racemes. Calyx-teeth short, nearly equal; standard 
obovate or oblong; wings oblong; keel obtuse. Ovulary sessile 
or stipitate, few-ovuled; style filiform. Pod ovoid or globose, 
straight, indehiscent or finally 2-valved. Seeds solitary or 
few. 
1. Flowers white. M. alba. 
1. Flowers yellow, sometimes pale. 2. 
2. Stipules with entire margin; lateral petals as long as the standard or 
barely shorter. 3. 
2. Stipules toothed at the base; lateral petals as long as the keel, but 
definitely shorter than the standard. M. indica. 
3. Leaflets rather closely serrate; pod glabrous or glabrate, prominently 
cross-ribbed. M. officinalis. 
3. Leaflets sub-entire or remotely toothed; pod pubescent, obscurely 
recticulate. M. altissima. 
1. Melilotus alba Desv. White Sweet-clover. 
Erect or ascending; branching; stem 3-10 ft. high, glabrous, 
leaves petioled, 2 yf in. long, 1 y 2 in. wide; leaflets in. long, 
p 2 in. wide, oblong, serrate, narrowed at the base and apex; 
flowers in racemes, 5-8 in. long, white; pods ovoid. In waste 
places. Native of Europe. General and abundant. 
2. Melilotus indica (L.) All. Indian Sweet-clover. 
Erect, branching from the root; stem 17 in. long; leaves 
petioled, Ifi in. long, 1 in. wide; leaflets tyf in. long, ^ in. wide, 
oblong, serrate, rounded at the apex; flowers in racemes, yellow, 
small; pod gibbous. 
3. Melilotus officinalis (L.) Lam. Yellow Sweet-clover. 
Erect, usually tall; branching at the root; leaves 2 in. long, 
in. wide, petioled; leaflets in. long, fi in. wide, oblong, 
serrate, apex rounded; flov r ers in racemes, 4-4 po in. long, yellow. 
In waste places. Rather general. From Europe. 
4. Melilotus altissima Thuill. Fall Sweet-clover. 
Erect, usually tall, leaflets narrow, nearly entire; pods pubes¬ 
cent, gibbous. 
Trifolium (Toum.) L. 
Herbs with purple, pink, red, white or yellow flow r ers in dense 
heads or spikes. Stipules united with the petiole. Calyx-teeth 
nearly equal. Petals commonly persistent, their claws more or 
less completely united with the stamen-tube. Ovulary sessile 
or stipitate, few^-ovuled. Pod oblong or terete, often included in 
the calyx, membranous, indehiscent or tardily dehiscent by 
1 suture, or by a lid, 1-6-seeded. 
