84 POLYGALACE^:. (MILKWOBT FAMILY.) 



10. P. incarnata, L. Stem often simple, glaucous ; leaves scattered, lin- 

 ear, fleshy, sometimes minute and subulate ; spikes lanceolate, acute, dense- 

 flowered ; petals united into a tube which is twice as long as the elliptical 

 wings, conspicuously crested ; caruncle spongy, as long as the stalk of the 

 oval hairy seed. Dry sandy soil, Florida to Mississippi, and northward. June 

 - August. Stem 1- 2 high. Bracts deciduous. Flowers and often the rachis 

 purple. 



11. P. setacea, Michx. Stems simple or sparingly branched, slender; 

 leaves minute, scale-like ; spikes oblong, dense-flowered, acute ; wings oblong, 

 acute, as long as the petals ; caruncle and seeds as in No. 10. Low pine bar- 

 rens, Florida to North Carolina, and westward. May - July. Stem 1 high. 

 Spikes '- l f long. Flowers pale rose-color or whitish. Bracts deciduous. 



# # * Spikes solitary : leaves whorled : flowers purple. 



12. P. cruciata, L. Stem erect, 4-angled, simple or branched; leaves 

 in fours, linear or oblong-linear, thick, obtuse, the upper ones alternate ; spikes 

 large, ovate, becoming cylindrical, short-peduncled ; wings ovate, tapering into 

 a long subulate point ; lobes of the caruncle linear, collateral, as long as the 

 smoothish oval seed. Pine-barren swamps, Florida to Mississippi, and north- 

 ward. July - Oct. Stem 6' - 1 2' high. Spikes 1 ' - 2' long, |' thick. Flowers 

 pale rose-color. Bracts persistent. 



13. P. brevifolia, Nutt. Stem weak, 4-angled, with long and spreading 

 branches ; leaves thin, lanceolate or linear, acute, the lower ones in fours ; spikes 

 small, ovate, long-peduncled ; wings lanceolate-ovate, barely pointed ; caruncle 

 as long as the obovate hairy seed. Bogs, Florida and northward. July - 

 Oct. Stem 1- 1 long. Spikes scarcely half as large as in the preceding. 

 Flowers reddish-purple. Bracts persistent. 



14. P. Hookeri, Torr. & Gray. Stems short, weak, much branched, 4- 

 angled; leaves in fours, short, linear, acutish; spikes long-peduncled, ovate- 

 lanceolate, acuminate, loose-flowered; wings erect, lanceolate-ovate, acute; 

 caruncle as long as the ovoid sparse-hairy and viscid seed. Low grassy 

 pine barrens, West Florida and westward. July - Sept. Stems 6'- 10' high. 

 Leaves 4" - 6" long ; those of the branches mostly alternate. Flowers pale 

 rose-color. Bracts persistent. 



2. Flowers in slender racemes or spikes. 

 * Leaves alternate: perennials or biennials. 



15. P. grandiflora, Walt. Pubescent; stems branching ; leaves lanceo- 

 late ; flowers large, crestless, scattered in long racemes ; fruiting pedicels droop- 

 ing ; wings large, orbicular, erect ; caruncle enclosing the stalk of the oblong 

 hairy seed. (P. pubescens, Muhl.) Varies with smoothish linear leaves, and 

 smaller flowers. (P. flabellata, Shuttl.) Dry light soil, Florida to South Car- 

 olina, and westward. July -Sept. 1|. Stem 1 high. Racemes 3'- 6' long, 

 often lateral by the prolongation of the stem. Flowers bright purple, turning 

 greenish. 



16. P. polygama, Walt. Smooth; stems numerous, simple; leaves 

 oblong-linear, the lowest spatulate or obovate ; flowers of two kinds, viz. one 



