GENTIANACE^E. (GENTIAN FAMILY.) 353 



1. S ABB ATI A, Adans. AMERICAN CENTAURT. 



Calyx 5 - 1 2-parted. Corolla wheel-shaped, 5-1 2-parted, withering-persistent. 

 Stamens 5-12, inserted on the throat of the corolla: anthers sagittate, mostly 

 recurved. Style conspicuous : stigmas linear or oblong, twisted. Capsule glo- 

 bose, 1-celled, 2-valved, many-seeded. Annual or biennial branching herbs, 

 with cymose or panicled white or purple showy flowers. 



* Calyx and corolla mostly 5-parted. 

 H- Flowers in corymbose cymes, white, turning yellowish : branches opposite. 



1. S. lanceolata, Torr. & Gray. Stem tall, terete below, 4-angled and 

 corymbosely branched above, the branches opposite ; leaves ovate or roundish, 

 3 - 5-nerved, acute or obtuse, clasping ; the upper ones distant, lanceolate, and 

 very acute; cymes large, loosely many-flowered; lobes of the corolla (often 6) 

 obovate-oblong, twice as long as the filiform calyx-lobes. (S. corymbosa, Baldw.) 

 Wet pine barrens, Florida to North Carolina. July. Stem 2 - 3 high. 

 Leaves l'~l^'long; the lowest minute. Corolla 10" wide, turning yellowish 

 in drying. 



2. S. paniculata, Pursh. Stem virgate, wing-angled throughout, com- 

 monly much branched from the base ; leaves clasping, lanceolate, 3-nerved, 

 mucronate, the upper and floral ones linear, the lowest tufted, oblong-obovate ; 

 cymes very numerous, densely few-flowered, leafy ; lobes of the corolla obovate, 

 one third longer than the linear calyx-lobes. Low grassy meadows, Florida to 

 North Carolina. August. Stem 9' -18' high. Leaves J'-l' long. Corolla 

 ' wide. 



3. S. macrophylla, Hook. Glaucous ; stem terete, corymbosely branched 

 above ; the branches opposite ; leaves thick, erect, ovate-lanceolate, acute, clasp- 

 ing, 3 - 5-nerved ; cymes large, flat-topped ; corolla small, the lobes thrice as 

 long as the very short bristle-like calyx-lobes. Wet pine barrens, Florida, and 

 westward. July and Aug. Stem rigid, hollow, 2 - 2^ high. Leaves 1^' -3' 

 long. Corolla 5" - 6" wide. 



H- 4- Flowers in panicled cymes, purple : branches opposite. 



4. S. angularis, Pursh. Stem square, wing-angled, erect, paniculately 

 much branched, often from near the base, the branches opposite ; leaves nu- 

 merous, ovate, clasping, 3 - 5-nerved, often as long as the joints, the upper ones 

 acute ; lobes of the corolla oblong, about twice as long*as the linear calyx-lobes. 

 Low rich grounds, Florida, and northward. Aug. Stem 1- 2 high. Leaves 

 1'- 1^' long. Corolla 1' wide. 



5. S. brachiata, 'Ell. Stem erect, terete, paniculately branched near the 

 summit ; the branches opposite, spreading ; leaves sessile, lanceolate, the upper 

 ones linear, acute, the lowest clustered ; flowers in small loose peduncled cymes, 

 terminating the branches, and forming an oblong or pyramidal panicle ; lobes 

 of the corolla narrowly oblong, twice as long as the linear calyx-lobes. Low 

 grounds in the middle and upper districts, and northward. July and Aug. Stem 

 2 high. Leaves 1' long. Corolla 1' wide. 



30* 



