GKNTIANACF.-E. (CKXTIAN FAMILY.) O03 



1. SABBATIA, Adans. American Centaury. 



Calyx 5 -12-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-valvcd, many-seeded. — Annual or biennial branching herbs, 

 with cymose or panicled white or purple showy flowers. 



* Calyx and corolla mostly ^-parted. 

 •*- 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-ncrved, 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, Bahlic.) 

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

 Leaves l'-H'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-obovatc ; 

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

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

 North Carolina. August. — Stem 9'- 18' high. Leaves g-'-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° -2j° high. Leaves l.V -3' 

 long. Corolla 5" -6" wide. 



+- -»- Flowers in panicltd cymes, purple : branches opposite. 



4. S. ailgularis, 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. — fetein 1° - 2° high. Leaves 

 l'-l^'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 peduneled 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. — Lew 

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

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



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