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POLEMONIACEAE 
Herbage pubescent or villous ; peduncles shorter than the leaves. 
Leaves thin, slightly hairy; low tufted plants; leaves and peduncles basal.... 
4. C. subacaulis. 
Leaves thick, covered with a dense villous pubescence ; low trailing plants ; 
leaves and peduncles basal and borne along the stem. 
5. C. villosus. 
1. C. arvensis L. Orchard Morning Glory. Stems 2.8 to 11.5 dm. 
long: leaves oblong- or triangular-sagittate; peduncles with a pair of 
subulate or spatulate bracts near the middle: corolla 2.4 to 3.6 cm. long.— 
A great pest in cult, fields and orchards; nat. from Eur. 
2. C. luteolus Gray. Climbing over shrubs and bushes, 1 to 5 m. high : 
leaves sagittate at base, the basal lobes very variable; bracts oblong or 
lanceolate, corolla 2.4 to 3.6 cm. long, the limb scarcely angular.— 
Foothills, cent, and n. .Cal. 
3. C. occidentalis Gray. Stems freely twining, 5 to 12 dm. long; 
leaves usually triangular-ovate, acuminate at apex, cordate-sagittate to 
hastate at base, the basal lobes often 1 or 2-toothed; corolla white or 
pinkish, 2.4 to 3.6 cm. long.—Coastal S. Cal. 
4. C. subacaulis (H. & A.) Greene. Stems 2.4 to 36 cm. long, trail¬ 
ing over the ground; herbage green; leaves ovoid or deltoid, hastate or 
truncate at base, 2.4 cm. long; corolla angularly 5-lobed, 3.6 to 4.8 cm. 
long.—Dry hills, Napa Co. and s. 
5. C. villosus (Kell.) Gray. Similar to no. 4, but the whole plant 
white with a velvety tomentum.—Dry slopes. 
2. IPOMAEA L. Morning Glory 
Similar to Convolvulus but style entire. (Greek ips, bindweed, and 
homoios, like.) 
1. I. batatas Poir. Sweet Potato. Stems creeping, long and smooth, 
the roots producing large tubers with yellow flesh; leaves heart-shaped to 
triangular; flowers purple; capsule with four 1-seeded cells.—Cult, from 
trop. Am. for the tubers, which when properly baked are inexpressibly 
delicious. Yam is a cult, variety with usually larger tubers and white 
flesh. 
POLEMONIACEAE. GILIA FAMILY 
Mostly herbs with the parts of the flower in 5s except the superior 
ovary, which is 3-celled. Stamens inserted on the corolla alternate with 
its lobes, often unequal in length. Style 3-cleft. Fruit a 3-valved cap¬ 
sule.—About 200 species, principally N. Am. 
Calyx replicate in sinus ; sinus distended in age into a revolute lobe....l. Collomia. 
Calyx neither replicate nor distended in sinus. 
Leaves pinnately parted, lobed or divided, or entire, alternate or, when 
opposite, oblong-lanceolate...2. Gilia. 
Leaves palmately lobed or divided or, when entire, linear and opposite. 
3. Linanthus. 
1. COLLOMIA Nutt. 
Herbs with alternate entire or pinnate leaves. Flowers in dense brac- 
teate clusters. Calyx scarious below the sinuses which finally enlarge 
into a distinct recurved lobule. Corolla tubular-funnelform or salver- 
form. Seeds 1 to several in each cell, becoming mucilaginous when 
moistened. (Greek kolla, glue, on account of the mucilaginous seeds.) 
