342 GEXTIANACEAS. (GENTIAN FAMILY.) 



sistent; I he stamens inserted on its tube. Seeds anatropons, with a minuta 

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

 carp ! (Bitter-tonic plants.) 



Synopsis. 



TEIBE I. GENTIAIVE^E. Lobes of the corolla convolute (twisted to the right) in the 

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

 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 seodJl 

 covering the whole face of the pericarp. 



* Style distinct and slender, deciduous. 



1. SABBATIA. Corolla wheel-shaped, 6-12-parted : anthers curved. 



2. ERYTI1RJ2A. Corolla'funnel-fonu 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. 

 8 PHASER A. Corolla 4 parted, wheel-shaped, spurless. Pod flat 

 4. I1ALEN1A. 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, tho 



lobes imbricated in the bud ! 



TRIBE II. MEN YAIVTIIEJE. 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-foliolate. 



9. LDINANTI1EMUM. Corolla smooth above. Leaves simple, rounded. 



1. S A K IS ATI A , Adans. - AMERICAN CEXTAURT. 



Calyx 5 - 1 2-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 steins, and eymose-panicled handsome (white or 

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



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

 -* Corolla white, often tummy ydlowish in drying: cymes corymbcd, wany-flowercd 



1. S. pailicillilta, Pursh, Ell. Stem bruchiatc/y much-branched (l-2 

 high), rather terete, hut angled with 4 sharp lines; hares limar or the hirer ol>- 

 lony, olititse, \-nerced, nearly equalling the imcrnodcs ; calyx-lobes linear-thread- 

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

 ward. June -Aug. 



2. S. laiirrolfita, Torr. & Gr. Stem simple (1- 3 high) bearing a Ihit- 

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

 shorter than the intcrnodes ; calyx-lohcs longer than in No. 1 ; the flowers lur- 

 gcr. (Chironia him-colata, Walt. S. corymbosa, Baldw.) Wet pine barrens, 

 from New Jersey southward. June, July. 



- - Corolla rose-color or pink, rarely white, mostly teitli a yellowish or yreemsh eye. 

 w- Erect, pi/raniidttllij nianij-JJowcn-d : branches opposite, cnrtfxh : pextuncba short. 



3. S. brsiclliftfa, Ell. Stem slightly ;///, simple helow (1- 2 high) ; 

 leaves linear and lincar-oi>lonq, d>t\ise t or the upper acute ; branches rather few 





