310 CONVOLVULACE^. (CONVOLVULUS FAMILY.) 



3. POLEMONIUM, L. 



Calyx bc'll->liapcd, 5-ilcft. Corolla .slion-bcll-sliapcd, 5-lobc(l. Stamens 5, 

 dudiiic'il, iiisciicd ciiiuilly on the throat of the corolla, with a hairy appendage 

 at the base of the lilanients. Ovules numerous in the cells. Capsule ovoid. 

 Seeds angled. — Herbs, with alternate pinnatcly divided leaves, and blue or 

 white flowers in a nearly bractless corymb. 



1. P. reptans, L. Smooth; stem weak, diffusely branched ; leaves peti- 

 oled, i)iniiate, with 5- 13 lanceolate or elliptical entire leaflets ; corymbs pcdun- 

 elcd, few-flowei-cd ; flowers nodding ; caly.x-lobes ovate, acute ; corolla blue ; 

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

 and May. U — Stem -}^°-l° high. Leaflets ^' - 1 ^' long. Caly.K enlarged in 

 fruit. 



4. PYXIDANTHERA, Miehx. 



Calyx .3-l)ractcd, 5-scpalous. Corolla bell-shaped, 5-Iobed ; the lobes rounded, 

 imbricated in tiic bud. Stamens broad, adnatc to the tube^f the corolla: anther- 

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

 in each cell. Capsule few-seeded. — A small creeping sliriih, with ascending 

 very leafy branches. Leaves evergreen, linear, bearded at ilie base, the upper 

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

 Corolla small, white. 



1. P. bai'bulata, Michx. (Diapensia, Ell.) — Dry pine baiTcns, North 

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

 3" Ion". 



Ordeu 93. CONVOLVUT^ACEiE. (Convolvulus 

 Fa:\iily.) 



Chiefly twining or prostrate herbs, with alternate cxsiiiuilatc leaves, 

 and regular mo.Uly sliowy and fugaceous flowers. — Calyx .j-sepulous, im- 

 bricated. Corolla bell-shaped, funnel-slia[)ed, or salver-tbimi, 5-plaited or 

 5-Iobed, convolute in the bnd. Stamens 5, inserted on the lube of the 

 corolla: anther.T 2-(olled, sagittate. Ovary free, single or double, 1-4- 

 celled, with 1 - 2 erect anatropous ovules in each cell. Styles 1 or 2, 

 entire or 2-;lrfL Stiimias capitate, ovate, or acute. Capsule 2-C-seedeil. 

 Embryo large, coiled or curved in mucilaginous albiuncn. 



Synopsis. 



Teide I. rO\VOI.,VUL,E.^. — Ovnry pinplc. Embryo with Icnfy cotyledons. Cap- 

 »ul»' opcnlfij; \<y valves. — Flowers Qxillury, pinplc or cynioso. 

 • Style Finjtln. SllKtnns (flobopp. 



1. QI;A>J0(I,IT (npsulc 4 celled, 4-8ecdcd. Corolla (red) onlvcr-sli.iped. SUincns M- 



ferted. 



2. BATATAS. (•.•ip.«ule4cellcd, 4 seeded. Corolla bell-shaped. Stuiiieiis hicluded. 



