340 CONVOLVULACE^E. (CONVOLVULUS FAMILY.; 



3. POLEMONIUM, L. 



Calyx bell-shaped, 5-eleft. Corolla short-bell-shapcd, 5-lobed. Stamens 5, 

 declined, inserted equally on the throat of the corolla, ^th 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. reptailS, L. Smooth; stem weak, diffusely branched; leaves pi ti- 

 ded, pinnate, with 5-13 lanceolate or elliptical entire leaflets ; corymbs pedun- 

 clcd, few-flowered ; flowers nodding ; calyx-lobes ovate, acute ; corolla blue ; 

 anthers white. — Shady mountain woods, South Carolina, and northward. April 

 and May. y. —Stem ^°-l° high. Leaflets £' - 1 £' long. Calyx enlarged in 

 fruit. 



4. PYXIDANTHERA, Michx. 



Calyx 3-bracted, 5-sepalous. Corolla bell-shaped, 5-lobcd ; the lobes rounded, 

 imbricated in the bud. Stamens broad, adnata to the tube of the corolla : anther- 

 cells roundish, awned at the base, opening by a transverse line. Ovules 5-8 

 iu each cell. Capsule few-seeded. — A small creeping shrub, with ascending 

 very leafy branches. Leaves evergreen, linear, bearded :it the base, the upper 

 ones alternate. Flowers solitary, terminal. Sepals oblong, obtuse, ciliate. 

 Corolla small, white. 



1. P. barbulata, Michx. (Diapensia, Ell.) — Dry pine barrens, North 

 Carolina, and northward. April and May. — Stems 3'- 6' long. Leaves 2" - 

 3" long. 



Order 99. CONVOLVULACE^. (Convolvulus 

 Family.) 



Chiefly twining or prostrate herbs, with alternate exstipulate leaves, 

 and regular mostly showy and fugaeeous flowers. — Calyx 5-eepalouB, im- 

 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 l - 2 erect anatropous ovules in each cell. Styles l or 2, 



entire or '.'-cleft. Stigmas capitate, ovate. V acute. Capsule 2-G-seeded. 

 Embryo large, coiled or curved in mucilaginous albumen. 



Synopsis. 



Tribe I. CONVOLVIILE^E.- Ovary tingle. Kmt.ryo with leafy cotyledons. Cap- 

 Bule opening by valve*. — Flowers axillary tingle 01 rymose. 

 • Stvle single. Stigma* glnlm**. 



1. QUAMOCUT i :,,, ,,1. 1 . il,.|, I s,-,-,l,,|. Corolla (red) salver-shaped. Stainena CX- 



■ertod. 



2. BATATAS Capsule 4 celled, 4-soeded. Corolla bell-shaped. Stamens Included. 



