292 GENTIAN FAMILY. 



globular, with many smooth and shining seeds. Flowers racemed on a stout scape ; 

 one or more long petioles sheathing its base, and bearing 3 oval or oblong leaflets. 

 7. LIMNANTHEMUM. Calyx and corolla 5-parted ; the oval divisions of the latter with 

 a yellowish crest at their base, and in our species otherwise naked. Style short or 

 none. Pod several-seeded. Water-plants, bearing the flowers in an umbel on the 

 long slender petiole of the floating, round-heart-shaped leaves. 



1. SABBATIA, AMERICAN CENTAURY. (L. Sabbati, an Italian 

 botanist.) Chiefly in sandy and low or wet grounds, along the coast 

 (with one or two exceptions); flowers white or pink, usually handsome, 

 in summer. (2) 



* Flowers white, 5-parted, numerous in cymes or corymbs, seldom over 



^ broad. 



S. paniculata, Pursh. Stem l-2 high, with 4 sharp wing-like 

 angles ; leaves linear or oblong, mostly 1-nerved ; lobes of the corolla 

 little longer than the narrow-linear calyx lobes. Va., S. 



S. lanceolata. Torr. & Gray. Taller, larger-flowered, with lance- 

 ovate, 3-nerved leaves, or the upper ones lanceolate and distant, acute ; 

 lobes of corolla much exceeding the thread-shaped calyx lobes. N. J., S. 



S. macrophylla, Hook. Glaucous, with terete stem, 2-3 high ; 

 lance-ovate 3-5- nerved leaves thickish, and lobes of smaller corolla very 

 much exceeding the bristle-like calyx lobes. Ga., S. 



* * Flowers rose-pink, rarely white, with yellowish or greenish eye, 5- 

 parted, in panicled clusters, 1' or more broad. In rather dry ground, 

 much branched above, l-3 high. 



B. brachiata, Ell. Stem slightly angled ; leaves linear or narrow- 

 oblong ; flowers few, only 1' broad. Ind., W. and S. 



S. angularis, Pursh. Wing-like angles to the stem, c vate or heart- 

 shaped, 5-nerved leaves, and corolla IV broad. Ontario, W. and S. 



* * * Flowers rose-purple or white, 5-6-parted, 1' or less broad, scattered 

 singly on long peduncles stems slender, 5'-20' high, commonly forking, 

 scarcely angled. All grow in salt marshes or near the coast. 



3. calyc6sa, Pursh. Leaves oblong, pale, narrowed at base ; calyx 

 lobes lance-spatulate, longer than the mostly white corolla. Va., S. 



S. stellaris, Pursh. Has lance-oblong leaves or the upper linear, and 

 linear calyx lobes shorter than the rose-purple yellowish eyed corolla. 

 Mass., S. 



S. gracilis, Salisb. Very slender, with linear or almost thread-like 

 leaves, thread-shaped calyx lobes as long as corolla ; otherwise like pre- 

 ceding. Mass., S. 



* * * * Flowers bright rose-color or with white varieties, 7-12-parted, 

 very handsome, 1^-2' broad; stems simple or sparingly branched, 1~ 

 2 high. 



S. chloroldes, Pursh. Along sandy ponds, from Mass., S. ; leaves 

 lanceolate ; peduncles 1-flowered, slender ; calyx lobes linear. 



S- gentianoides, Ell. Stem leaves linear; flowers short-peduncled or 

 sessile, clustered. Wet barrens, Ga., S. 



2. FRASERA, AMERICAN CALUMBA. (John Fraser, who col- 

 lected in this country a century ago.) 



P. Carolin<nsis, Walt. Rich wooded ground N. Y. to Wis., and S. ; 

 root very large and deep, bitter (used in medicine as a substitute for 



