342 GENTIANACE.E. (GENTIAN FAMILY.) 



sistent; (lie stamens inserted on its tube. Seeds anatropous, with a minute 

 embryo in fleshy albumen, sometimes covering the entire face of the peri- 

 carp ! (Bitter-tonic plants.) 



Synopsis. 



Tribe I. GEKTIAKEjE. Lobes of the corolla convolute (twisted to the right) in tho 



bud (with the sinuses mostly plaited), in Obolaria imbricated Leaves almost always 

 opposite or whorled, entire, those of the stem sessile. Seeds very small and numerous, 

 with a cellular coat; in Obolaria, Bartonia, and several Gentians, the ovules and seeds 

 covering the whole face of the pericarp. 



* Style distinct and slender, deciduous. 



1. SABBATIA. Corolla wheel-shaped, 5- 12- parted : anthers curved. 



2. ERYTUItiEA. Corolla funnel-form or salver-shaped, 4- 5-cleft : anthers spiral. 



* * Style (if any) and stigmas persistent: anthers straight. 

 *- Corolla with a glandular spot or hollow spur to each lobe. 



3. FRASERA. Corolla 4 parted, wheel-shaped, spurless. Pod fiat 



4. HALENIA Corolla 4-5-cleft, bell-shaped, and with as many spurs from the base. 



i- ■*- Corolla without glands or spurs. 

 6. GENTIANA. Calyx 4- 5-cleft. Corolla mostly with plaited folds at the sinuses. 

 6. BARTONIA. Calyx 4-parted. Corolla 4-parted, with no plaits at the sinuses. 

 7 OBOLARIA. Calyx 2-leaved. Corolla tubular-bell-shaped, 4-lobed, with no plaits, the 

 lobes imbricated in the bud! 



Tribe II. MENYAA'TIIEJE. Lobes of the corolla valvate in the bud, with the edges 

 turned inwards. Stem-leaves alternate, petioled Seed-coat hard or bony. 



8. MENYANTIIES. Corolla bearded inside. Leaves 3-foiiolate 



9. LLMNANTUEMUM. Corolla smooth above. Leaves simple, rounded. 



1. SABBATIA, Adans. American* Centaury. 



Calyx 5-12-parted, the divisions slender. Corolla 5-12-partcd, wheel- 

 shaped. Stamens . r )-12: anthers recurved. Style 2-parted, slender. — Bien- 

 nials or annuals, with slender stems, and cymosc-panicled handsome (white or 

 rose-purple) flowers. (Dedicated to Sabbat i, an early Italian botanist.) 



* Corolla 5-partcd, or rarely 6 - 7-parted. 

 ■*-• Corolla white, often turning yellowish in drying: cymes corymbed, many-flowered. 



1. S. ]>amcillfgta, Pursh, Ell. Stem brachiately much-branched (l°-2° 

 high), rather terete, but angled with 4 sharp lines; leaves linear or tlie lower ob- 

 long, obtuse, l-nerved, nearly equalling the intcmodes ; calyx-lobes linear-thread- 

 form, much shorter than the corolla. — Damp pine woods, Virginia and south- 

 ward. June -Aug. 



2. S. lanccolata, Torr. & Gr. Stem simple (1°- 3° high) bearing a flat- 

 topped cyme ; leaves ovate-lanceolate or ovate, 3-nerved, the upper acute, much 

 shorter than the internodes ; calyx-lobes longer than in No. 1 ; the flowers lar- 

 ger. (Chirouia lanceolate, Walt. S. corymbosa, Baldiu.) — Wet pine barrens, 

 from New Jersey southward. June, July. 



<•- ■*- Corolla rose-color or pink, rarely white, mostly with a yellowish or greenish eye. 

 ++ Erect, pyramidally many-flowered: branches opposite, erect 'ish: peduncles short. 



3. S. brachiata, Ell. Stem slightly angled, simple below (1°- 2° high) ; 

 leaves linear and Unear-oblonq, obtuse, or the upper acute ; branches rather few 



