PUNICACEAE 
107 
2. V. exigua Nutt. California Vetch. Leaflets 4 to 12; flowers on 
a peduncle 1.2 to 3.6 cm. long.—Cent, to S. Cal. 
3. V. americana Muhl. Stems 5 to 8 dm. long, trailing or climbing, 
sharply 4-sided or 4-winged; leaflets broadly oblong, 1.2 to 2.4 cm. long: 
peduncles 4 to 8-flowered; flowers purplish, changing to bluish, 1.8 cm. 
long.—Hill country. Var. ltnearis Wats. Leaflets very narrow, 3 mm. 
wide or less. Var. truncata Brewer. Leaflets broad, truncate at apex 
and 3-denticulate. 
4. V. gigantea Hook. Giant Vetch. Stout, climbing 8 to 17 dm. 
high and often forming extensive tangles over shrubs; leaflets 20 to 30. 
narrowly oblong; peduncles 7 to 18-flowered; flowers pale purple.—• 
Along streams. 
14. LATHYRUS L. Pea 
Perennial herbs, very like Vicia, but leaflets usually larger (in 3 to 5 
pairs ) and style flattish and hairy along the upper side only. (Old Greek 
name of the pea.) 
1. L. vestitus Nutt. Stems angled, often 5 to 11 dm. high; leaflets 
about 2.4 cm. long, 4 to 8 mm. wide; stipules narrowly semi-sagittate: 
raceme many-flowered; corolla purplish.—Hill country. 
15. PISUM L. Pea 
Climbing herbs with pinnate leaves, the common petiole terminated by 
a tendril. Leaflets 1 to 3 pairs. Calyx-lobes leafy. Style rigid, widened 
above, bearded down the inner edge. Pods several-seeded. Seeds glo¬ 
bose. (Latin name of the pea.) 
1. P. sativum L. Garden Pea. Tendril-climbing; glabrous and glau¬ 
cous ; leaflets oval or ovate, 2 or 3 pairs; stipules large, leafy; flowers 
few on axillary peduncles, white; pods rather fleshy.—Cult, from Eur. 
16. PHASEOLUS L. Bean 
Annual or perennial mostly twining herbs. Leaves pinnately 3-folio- 
late. Flowers clustered on axillary peduncles. Keel of corolla coiled into 
a spiral. Pod scimitar-shaped. (Ancient Latin name, somewhat altered, 
of a bean.) 
1. P. vulgaris L. String Bean. Pole Bean. Twining racemes of 
white, purplish or variegated flowers shorter than the leaves; pods 
linear, straight; seeds tumid.—Cult, from trop. Am. 
2. P. lunatus L. Lima Bean. Twining; racemes of small green¬ 
ish-white flower shorter than the leaves; pods broad, curved; seeds flat. 
—Cult, from S. Am. 
PUNICACEAE. POMEGRANATE FAMILY 
Shrubs or trees. Leaves opposite or nearly so, persistent, entire. 
Flowers perfect, red. Calyx and corolla 6 (or 5 to 8)-merous. Ovary 
inferior, with the carpels in two superimposed series of 3 and 5.—Species 
2, Asia. 
1. PUNICA L. 
Small tree. Flowers in simple axillary racemes. Calyx persistent. 
Fruit a spherical thick-skinned manv-celled berry. (Punicus, Carthagi- 
