POLYGALACEAE. 177 



2. P, Senega L. Plants 1-5 dm. tall: blades of the upper leaves linear to 

 lanceolate or ovate, more or less serrulate: flowers greenish-white: sepals 1.5-2 

 mm. long: wings orbicular-obovate or suborbicular, 2-3 mm. long, obtuse: 

 keel about as long as the wings, short-clawed: lateral petals 2-3 mm, long: 

 capsules broader than long, 3.5-4.5 mm. long. — M. Bare, in woods. — Lime- 

 stones. — Spr. — Seneca-snakeroot. 



3. P. incamata L. Plants 2-7 dm. tall: blades of the upper leaves linear- 

 subulate to subulate: flowers pink, purple, or white: sepals 2-2.5 mm. long, 

 acute: wings lanceolate to spatulate, 3-4 mm. long: keel 6-8 mm. long, the 

 claw longer than the body: lateral petals 5-7 mm. long: capsules ovoid, 3-4 

 mm. long. — S. Bare, in swamps and low grounds. — Scliists. — Sum. 



4. P. Nuttallli T. & G. Plants 1-2.5 dm. tall: blades of the lower leaves 

 linear-spatulate, those of the upper ones narrowly linear: flowers purplish or 

 greenish: sepals about 1 mm. long or less: wings elliptic or elliptic-lanceolate, 

 2-2.5 mm. long: keel about as long aa the wings: lateral petals about 2 mm. 

 long: capsules about 1.5 mm. long: caruncle about J as long as the seed. — 



5. Bather common, on moist banks and roadsides. — Schists. — Sum. 



5. P. viridescens L. Plants 1-5 dm. tall: blades of the lower leaves spatulate, 

 those of the upper ones linear to linear-oblong: flowers reddish-purple, green, 

 or white: sepals 1.5-2 mm. long: wings broadly ovate or oval, 4-6 mm. long: 

 keel 2.5-3 mm. long: lateral petals much shorter than the wings: capsules 

 about 2 mm. long: caruncle usually fully i as long as the seed. — N. S. 

 Common, on banks and in moist places. — Sandstones and shales, schists. — Sum. 



6. P. ambigua L. Plants 1-3 dm. tall: blades of the lower leaves spatulate to 

 linear-spatulate, those of the upper ones linear, usually narrowly so: flowers 

 purplish or greenish-purple: sepals about 1 mm. long or less: wings suborbic- 

 ular, 1.5-2 mm. wide : keel 1.5-2 mm. long : capsules suborbicular, fully 1.5 

 mm. long. — Common, in fields and on roadsides, and in woods. — Sum. 



7. P. verticillata L. Plants 0.5-3 dm. tall: blades of the lower leaves spatu- 

 late, those of the upper ones linear to linear-lanceolate: sepals 1.5 mm. long 

 or less: wings ovate to obovate, 1-1.5 mm. long: keel about 1.5 mm. long: 

 capsules broadly oblong to ovoid-oblong, 2 mm. long. — S. Bather common, in 

 fields and on roadsides, and in woods. — Sum. 



8. P. cruclata L. Plants 0.5-4 dm. tall: blades of the lower leaves spatulate 

 or obovate, those of the upper ones linear-spatulate or almost linear: flowers 

 rose-purplish or greenish: sepals not ciliate, 1.5-2 mm. long: wings deltoid or 

 hastate-deltoid, 4.5-6 mm. long, caudate-acuminate: capsules obovate or euneate- 

 obovate. — S. Bare, in swamps and low grounds. — Schists. — Sum. 



Order EUPHORBIALES. 



Herbs, shrubs, or trees, sometimes aquatic or amphibious, but mainly 

 terrestrial, commonly with milky juice. Leaves various, sometimes re- 

 duced to scales, or almost wanting. Flowers mainly monoecious or dioe- 

 cious, regular. Calyx of several sepals. Corolla of several petals, or 

 often wanting. Androecium of more than one stamen, except when the 

 staminate flowers are scattered over the inside of an involucre. Filaments 

 distinct or united into a column. Anthers opening by longitudinal or 

 transverse valves. Gynoecium of 2, 3, or 4, or rarely more, united carpels, 

 superior. Styles, or stigmas, usually distinct and cleft or foliaceous, 

 united by pairs in CallitricJiaceae. Ovules 1, 2, or 3 in each cavity. Fruit 



Lancaster County Flora 12. 



