342 GENTIANACEJK. (GENTIAN FAMILY.) 



sistent; the 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. GENTIANEJE. Lobes of the corolla convolute (twisted to the right) In th* 

 bud (with the sinuses mostly plaitad), 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. ERYTHRJEA. Corolla funnel-form or salver-shaped, 4- 5-cleft : anthers spiral. 



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

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



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



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



*- *- 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, th 



lobes imbricated iu the bud ! 



TRIBE H. MEN YANTHE.3E. Lobes of the corolla valvate in the bud, with the edgei 

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



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



9. L1MNANTHEMUM. Corolla smooth above. Leaves simple, rounded. 



1. SABBATIA, Adans. AMERICAN CENTAURY. 



Calyx 5-12-partcd, 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 cymose-panicled handsome (white or 

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



# Corolla 5-parted, or rarely 6 - 7 '-parted. 

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



1. S. pailicillitta, Pursh, Ell. Stem brack-lately much-branched (l-2 

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

 long, obtuse, I -nerved, nearly equalling the internodes ; calyx-lobes linear-thread- 

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

 ward. June - Aug. 



2. S. lailCCOlata, Torr. & Gr. fitem simple (1- 3 high) bearing a flat- 

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

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

 ger. (Clriroiiia lanceolata, Walt. S. corymbosa, Baldw.) Wct pine barren*, 

 from New Jersey southward. June, July. 



_ H_ Corolla rose-color or pink, rarely white, mostly with a yellowish or greenish eye. 

 ** Erect, pyramidally many -flower ed : branches opposite, cnr.tish : peduncfa short. 



3. S. bractliata, Ell. Stem slightly angled, simple below (l-2 high) ; 

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



