340 CONVOLVULACEH. (CONVOLVULUS FAMILY.) 
3. POLEMONIUM, L. 
Calyx bell-shaped, 5-cleft. Corolla short-bell-shaped, 5-lobed. Stamens 5, 
declined, inserted equally on the throat of the corolla, with a hairy appendage 
at the base of the filaments. Ovules numerous in the cells. Capsule ovoid. 
Seeds angled.— Herbs, with alternate pinnately divided leaves, and blue or 
white flowers in a nearly bractless corymb. 
1, P. reptans, L. Smooth; stem weak, diffusely branched ; leaves peti- 
oled, pinnate, with 5-13 lanceolate or elliptical entire leaflets ; corymbs pedun- 
cled, few-flowered ; flowers nodding; calyx-lobes ovate, acute; corolla blue; 
anthers white. — Shady mountain woods, South Carolina, and northward. April 
and May. Y — Stem }°-1° high, Leaflets -14 long. Calyx enlarged in 
fruit. 
4. PYXIDANTHERA, Michx. 
Calyx 3-bracted, 5-sepalous. Corolla bell-shaped, 5-lobed ; the lobes rounded, 
imbricated in the bud. Stamens broad, adnate to the tube of the corolla: anther- 
cells roundish, awned at the base, opening by a transverse line. Ovules 5-8 
in each cell. Capsule few-seeded. — A small creeping shrub, with ascending 
very leafy branches. Leaves evergreen, linear, bearded at the base, the upper 
ones alternate. Flowers solitary, terminal. Sepals oblong, obtuse, ciliate. 
Corolla small, white. 
1. P. barbulata, Michx. (Diapensia, Æl.) — Dry pine barrens, - 
Carolina, and northward. April and May.— Stems 3/-6/ long. Leaves 2"- 
3" long. 
f 
ORDER 99. CONVOLVULACEJE. (CowvoLvuLUS 
FauiLY.) 
Chiefly twining or prostrate herbs, with alternate exstipulate leaves 
and regular mostly showy and fugaceous flowers. — Calyx 5-sepalous, 1m- 
bricated. Corolla bell-shaped, funnel-shaped, or salver-form, 5-plaited or 
5-lobed, convolute in the bud. Stamens 5, inserted on the tube of the 
corolla: anthers 2-celled, sagittate. Ovary free, single or double, 1-4 
celled, with 1-2 erect anatropous ovules in each cell. Styles 1 oF %, 
entire or 2-cleft. Stigmas capitate, ovate, or acute. Capsule 2 -6-seeded. 
Embryo large, coiled or curved in mucilaginous albumen. 
Temer. CONVOLVULEAE.— Ovary single. Embryo with leafy cotyledons. = 
ide sule opening by valves. — Flowers axillary, single or cymose. 
