342 GENTIANACE^. (GENTIAN FAMILT.) 



sistent; the stamens inserted on its tube. Seeds anatropoiis, with a minute 

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

 carp 1 (Bitter-tonic plants.) 



Synopsis. 



TRraE I. GENTIAWBJE. Lobes of the corolla convolute (twisted to the right) in the 

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

 opposite or whoried, 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. ERTTHILSIA. Corolla funnel-form or salver-shaped, 4-5-cleft : anthers spiral. 



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

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



3. FKASBRA. Corolla 4-parted, wheel-shaped, spurless. Pod flat 



4. HALENIA. Corolla 4- 6-clefl, bell-shaped, and with as many spurs from the base. 



•t- •*- Corolla without glands or spurs. 

 B. GENTIANA. Calyx 4 - 6-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 Z-leaved. Corolla tubular-bell-shaped, 4-lobed, with no plaits, the 



lobe£ imbricated in the bud ! 



Teibb II. MEJTYAlVTHEa;. Lobes of the corolla valvate in the bud, with the edges 

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



8. MENYANTHES. Corolla bearded inside. Leaves 3-foUolat6. 



9. LIMNANTHEMUM. CoroUa smooth above. Leaves simple, rounded. 



1. SABBATIA, Adans. Ameeican Centaukt. 



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

 shaped. Stamens 5-12: anthers recurved. Style 2-parted, slender. — Bien- 

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

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



* Corolla 5-parted, or rarely 6 - 1 -parted. 

 ■w Corolla white, often turning ydlowish in drying : cymes corymbed, many-Jiowered. 



1. S. paniculata, Pursh, Ell. Stem brachiately much-brancJied (l°-2° 

 high), rather terete, hut angled with 4 shai'p lines ; leaves linear or the lower ob- 

 long, obtuse, 1-nerved, nearly equalling the intemodes ; calyx-lobes linear-thread- 

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

 ward. June - Aug. 



2. S. lanceolata, Torr. & Gr. Sifmsimpfe (1°- 3° high) bearing aflat- 

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

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

 ger. (Chironia lanceolata, TPaZ^. S. corymbosa, BaWio.) — Wet pine baiTens, 

 from New Jersey southward. June, July. 



•t- H— Corolla rose-color or pink, rarely white, mostly with a yellowish or greenish eye, 

 ■*•*■ Erect, pyramidally many-Jlowered : branches opposite, erectish : peduncles short. 



3. S. brachiata, Ell. Scm sfcV/Myan^rW, simple below (1°- 2° high); 

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



