DICOTYLEDONOUS PLANTS 129 
XX. LATHYRUS, Tourn. 
Like Vicia excepting that the leaflets are fewer and the 
style is bearded on the side toward the standard. 
1. L. venosus, Muhl. Verny Vetcn. Perennial. Stem stout, 
prominently angled, climbing or reclining, 2—5 ft. long. Leaves 
short-petioled ; stipules large, lanceolate; leaflets 5-7 pairs, broadly 
ovate-obtuse, mucronate. Peduncles nearly as long as the leaves, 
many-flowered. Flowers purple, 2 in. long. Calyx-teeth very 
unequal. Pod linear, veined, 4-6-seeded. Shady banks and moist 
prairies.* 
2. L. maritimus, Bigelow. Bracu Pea. Perennial. Stem stout, 
1-2 ft. high. Stipules broadly ovate and heart or halberd shaped, 
nearly as large as the 6-12 leaflets, of which the lower pair is the 
largest; tendrils pretty large. Flowers large, blue or purple. Sea- 
shores and beaches of the Great Lakes. 
3. L. palustris, L. Wrip Pea. Stem frequently winged, slender, 
and climbing by delicate tendrils at the ends of the leaves. Stipules 
narrow and pointed ; leaflets 4-8, narrowly oblong to linear, acute. 
Peduncles bearing 2-6 pretty large, drooping, blue, purple, and 
white flowers. Damp thickets and borders of swamps. 
4. L. odoratus, L. Sweer Pra. Annual. Stem roughish- 
hairy, it and the petioles winged. Leaflets only one pair, oval or ob- 
long. Flowers large, 2 or 3 on the long peduncles, sweet-scented, 
white, rose-color, purple, or variegated. Cultivated from Europe. 
XXI. PISUM, L. 
Climbing or prostrate herbs. Style enlarged above, grooved 
on the back, soft-hairy down on the inner edge. Leaflets 
1-3 pairs. Flowers and fruit much like those of Lathyrus. 
1. P. sativum, L. Common Pea. Annual. Smooth and covered 
with a bloom. Leaflets usually 2 pairs; tendrils branching ; stip- 
ules large, ovate, rather heart-shaped at the base. Peduncle severa'- 
flowered. Flowers white, bluish, reddish, or variegated. Pods large; 
seeds globular or somewhat flattened and wrinkled. There are 
many varieties, differing greatly in size, of the plant and of the 
fruit. Cultivated from Europe (?). 
47. GERANIACEZ. GERANIUM FAMILY. 
Herbs or small shrubs. Leaves simple, usually with glan- 
dular hairs which secrete an aromatic oil. Flowers perfect, 
