GENTIAN FAMILY. 271 



*- *- Style (if any] and stigmas persistent on the pod : anthers straight. 



2. ERASER A. Calyx and corolla deeply 4-parted, wheel-shaped; divisions of the 



latter with a glandular and fringed spot or pit on their middle. Pod oval, 

 flattened, rather few-seeded: feeds large and flat, wing-margined. Large 

 thick-rooted herbs, with whorled leaves and panicled flowers. 



3. GEN II ANA. Calyx 4 - 5-cleft. Corolla 4 - 5-lobed, often with teeth or salient 



folds at the sinuses, usually withering-persistent. Style short or none; stig- 

 mas 2, persistent. Pod oblong, containing innumerable small seeds with loose 

 cellular or winged coat. Flowers solitary or clustered, mostly showy. 



4. BARTONIA. Calyx 4-parted. Corolla deeply 4-cleft. Style none. Pod ob- 



long, flattish, the minute innumerable seeds covering its whole inner face. 

 Flowers very small. Leaves reduced to little awl-shaped scales. 



2. Learts alternate, lo-nn petioled. Corolla with the lobes valvate and the edges 

 turned inwards in the bud. Seeds many or few, with a hard or bony coat. 



5. MKNYANTHES. Calyx 5-parted. Corolla very short-funnel-form, 5-lobed, 



white-bearded over the whole upper face. Style slender, persistent: stigma 

 2-lobed. Pod globular, with many smooth and shining seeds. Flowers 

 racemed on a stout scape; one or more long petioles sheathing its base, 

 and bearing 3 oval or oblong leaflets. 



6. LIMNANTHEMUM. Calyx" and corolla 5-parted; the oval divisions of the 



latter with a yellowish crust at their base, and in our species otherwise 

 naked. Style short or none. Pod several-seeded. Water-plants, bearing 

 the flowers ill an umbel on the long slender petiole of the floating round- 

 heart-shaped leaves. 



1. SABBATIA, AMERICAN CENTAURY. (Named for Sabbati, an 



Italian botanist.) Chiefly in sandy and low or wet grounds, along the 

 coast (with one or two exceptions) : flowers white or pink, usually handsome, 

 in summer. 



* / 'lowers white, ^-parted, numerous in cymes or corymbs, seldom over ' bs'oad. 



S. paniculata. Low grounds S. : stem 1 - 2 high, with 4 sharp wing- 

 like angles ; leaves linear or oblong, mostly 1 -nerved ; lobes of the corolla little 

 longer than the narrow-linear calyx-lobes. 



S. lanceolata. From New Jersey S. : taller, larger-flowered, with lance- 

 ovate 3-nerved leaves, or the upper one's lanceolate and di-tant, acute ; lobes of 

 corolla much exceeding the thread-shaped calyx-lobes. 



S. macrophylla. Only S. : 2 -3 high, glancons, with terete stem, 

 thickish lance-ovate 3-5-nervcd leaves, and lobes of smaller corolla very much 

 exceeding the bristle-like calyx-lobes. 



* # Flowers rose-pink, rarely white, with yellowish or greenish ei/e, ^-parted, in 



jian/c/fd clusters, 1' or more broad. In rather dn/ (/round, much branched 

 above, 1-3 D high, the only species which extend W. to Illinois, frc. 

 S. brachiata, chiefly S., has slightly angled stem, linear or narrow-oblong 

 loaves, and fewer flowers only 1' broad. 



S. angularis, from N. York S. & W., has wing-like angles to the stem, 

 ovate or heart-shaped 5-ncrved leaves, and corolla l' broad. 



* * * Flowers rose-purple or white, 5 -^-parted., 1' or lexs broad, scattered singly 



on lonij peduncles : interns slender 5' -20' high, commonly forking, scarcely 

 angled. All grow in sail miir.th.ts or near the coast. 



S. calycbsa. Only from Virg. S. : has oblong pale leaves narrowed at 

 base, and lancc-spatnlate calyx-lobes longer than the mostly white corolla. 



S. Stellaris. From Mass. S. : has lance-oblong leaves or the upper linear, 

 and linear calyx-lobes shorter than the rose-purple yellowish eyed corolla. 



S. gracillS. From Mass. S. : very slender, with linear or almost thread- 

 like leaves, thread-shaped calyx-lobes as long as corolla, otherwise like preceding. 



* * * * Flowers briaht rose-color or with white varieties, 7 - 1 ^-parted, rery hand- 



some, iy - 2' broad : stems simple or sparingly branched, 1 -2 high. 



S. chloroides. Along sandy ponds, from Plymouth, Mass. S. : leaves 

 lanceolate; peduncles 1 -flowered, slender; calyx-lobes linear. 



S. gentian oides. Wet barren* S. : stem-leaves linear , flowers shortr 

 peduncled or sessile, clustered. 



