209 
I House, Many Males. Monoec. Polyand. 
686. Whorled Milfoil. — M. verticillatum. 
Flowers in whorls, in the bosoms of the 
leaves. — Sowerby. 218. excellent. 
Ditches, July, P. Common. 
Arrow-head. Sagittar'ia. Gen. PI. 1441* 
Male. — Cup of 3 leaves. Blossom of 3 pe- 
tals. 
Female. — Cup of 3 leaves. Blossom of 5 
petals. Seeds many, naked. 
687. Common Arrow-head. — S. sagittifolia. 
Leaves pointed, arrow-shaped. — Sowerby. 
84. 
Rivers, July, P. Common, 
Burnet. Poterium. Gen. PI. 1445. 
Male, — Cup of 4 leaves. Blossom of 4 
segments. 
Female. — Cup of 4 leaves. Blossom of 4 
segments. Berry formed of the hardened 
tube of the blossom. 
688. Common Burnet. — P. Sanguisorba. 
Without thorns, stems somewhat angular. — 
Curtis. II. 64. Martyn. 69. 
Hilly Pastures, June, P. Common. 
E e 
Oak. 
