486 GENTIANACEAE 
1. SPIGELIA, L. 
Herb, with opposite leaves with entire margins. Flowers in long nar- 
row one-sided clusters. Stamens 5; style 1, slender; capsule short. 
S. marylandica, L. MaryLtanp PINK-RooT. Stem simple, 4-angled, 
erect, 1 to 2 ft. high. Leaves without leaf-stalks, a membrane passing 
from one to its opposite, egg-shaped or lance-shaped, Corolla tubular 
with 5 narrow segments above, scarlet outside, yellow within. Flowers 
in one-sided cluster. Woods, New Jersey, and south. 
2, POLYPREMUM, L. 
Smooth, diffusely branched annual herb, with narrowly linear or awl- 
shaped opposite leaves with their bases connected by a membrane repre- 
senting stipules. Flowers small, white, in terminal bracted clusters. 
Corolla not longer than the calyx, almost wheel-shaped with 4 lobes. 
Stamens 4, short; style 1, short. Capsule ovoid, notched at apex. 
P. procumbens, L. PotypremuM. Flowers in the forks at the ends 
of the branches. Dry sandy fields, New York, Pennsylvania, and south- 
ward, June-Oct. 
Famity II].—GENTIANACEAE., GeENTIAN FAMILY 
Smooth herbs, with opposite (rarely whorled) leaves and con- 
spicuous flowers, the corolla of which is tubular, bell-shaped or 
wheel-shaped, and which, in the bud is twisted. The divisions of 
the calyx are 4 to 10 which are united at base. The corolla lobes 
are as many as the divisions of the calyx and the stamens number 
as many as the corolla lobes and are inserted alternately with 
them into the throat. Styles united into one, but sometimes want- 
ing. Ovary 1-celled; capsule many seeded. 
Leaves reduced to scales, whole extent of stem . . Bartonia 
Lower leaves reduced to scales . . . . . . +. #£Obolaria 
Leaves fully developed. 
Often in witorls. ..-s esc) a we ek Me 
Opposite. 
Corolla with horms. . . . . . »« » | OnGuae 
Corolla without horns or spurs. 
Wheel- or bell-shaped, deeply cleft . Sabbatia 
Tubular. 
Style short or none. . . . . Gentiana 
Style long, slender .... s,. Erythraea 
1. ERYTHRAEA, Rencalm 
Herbs; leaves opposite without leaf-stalks, sometimes clasping the stem; 
flowers numerous, rather small; corolla a long slender tube with 4 or 5 
