DICOTYLEDONOUS PLANTS 185 



1. I. hederacea, Jacq. WILD MORNING-GLORY. Stems hairy, 

 twining. Leaves heart-shaped, 3-lobed. Peduncles 1-3-flowered. 

 Calyx very hairy below. Corolla showy, bluish-purple or white, 

 Pod usually 3-celled, with .2 seeds in each cell. A weed in fields 

 and about dwellings ; introduced from tropical America. 



2. I. pandurata, Meyer. WILD POTATO VINE. Perennial, from 

 a very large, tuberous root ; stem trailing or twining, smooth or 

 slightly downy, 5-10 ft. long. Leaves broadly heart-shaped, with 

 the apex slender and obtuse, sometimes fiddle-shaped or 3-lobed ; 

 petioles slender. Peduncles longer than the petioles, 1-5-flowered. 

 Sepals oblong, obtuse, smooth, mucronate, the 2 outer ones shorter. 

 Corolla white with a purple throat, 23 in. wide, lobes pointed. 

 Capsule globose, 2-3-seeded, the seeds woolly 011 the angles. On 

 dry or damp, sandy soil, along fences, railroad embankments, etc., 

 common S. and W.* 



83. POLEMONIACEJE. PHLOX FAMILY. 



Annual or perennial herbs, rarely shrubs. Leaves alter- 

 nate or the lower opposite, without stipules. Flowers in ter- 

 minal, forking cymes. Calyx free from the ovary, 5-lobed. 

 Corolla regular or nearly so, 5-parted. Stamens 5, inserted 

 on the corolla-tube, usually unequal. Ovary 3-celled ; style 

 simple ; stigmas 3, linear ; capsule 3-celled, the cells 1-many- 

 seeded. 



I. PHLOX, L. 



Perennial or rarely annual herbs ; stems erect or diffuse. 

 Leaves opposite, or the upper alternate, entire, without stip- 

 ules. Flowers showy, white or purple, in terminal cymes 

 or panicles. Calyx cylindrical or funnel-form, 5-cleft, the 

 lobes acute. Corolla salver-form, the tube long and slender, 

 the limb 5-parted, the lobes spreading, entire or obcordate. 

 Stamens included, unequal. Ovary 3-celled, style slender. 

 Capsule ovoid, 3-celled, 1 few-seeded ; seeds wingless or 

 narrow-winged.* 



1. P. paniculata, L. GARDEN PHLOX. Perennial ; stems in 

 clumps, stout, erect, simple or branched above, 2-4 ft. high. Leaves 

 ovate-lanceolate to oblong, taper-pointed at the apex, rounded or 

 cordate at the base, thin, smooth, veins prominent beneath. Cymes 

 numerous and compact, forming a pyramidal panicle ; pedicels short. 



