GENTIAN FAMILY. 271 



■1- H- 8tyk (if any) and itigmat pertitlenl on the pod: antheri straight. 



2. FRASERA. CmIj-x and corolla deeply l-parted, wheel-shaped; divisions of the 



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

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

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



3. GENTIAN A. Calyx 4 - 6-cleft. Corolla 4- 5-lobed, often with teeth or salient 



folds at the sinuses, usually withering-persistent. Slyle 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. Corolhi deeply 4-cleft. Style none. Pod ob- 



long, flatfish, the minute innumerable seeds covering its whole imier face 

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



§ 2. Leaves aiternale, lonn vetioled. CvrnUa with the lobes valvaie and the edges 

 turned inwards in the hid. Seeds many or few, mth a hard or bony coat. 



5. MENYANTHES. Calyx 5-pai-ted. 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 in an umbel on the long slender petiole of the floating round- 

 heart-shaped leaves. 



1. SABBATIA. AMERICAN CENTAURY. (Named for Sahbati, 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. ® © 

 » Flowers white, 5-parted, numerous in cymes or corymbs, seldom over J' broad. 



S. paniculilta. Low grounds S. : stem l°-2° high, with 4 sharp wing- 

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

 longer than the narrow-linear calyx-lobes. 



S. lauceol&ta. From New Jersey S. : taller, larger-flowered, with lance- 

 ovate 3-nervcd leaves, or the upper ones lanceolate and distant, acute ; lobes of 

 corolla much exceeding the thread-shaped calyx-lobes. 



S. macroph^lla. Only S. : 2° -3° high, glaucous, with terete stem, 

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

 exceeding the bristle-like calyx-lobes. 



• « Flowers rose-pink, rarely white, unth yellowish or greenish eye, 5-piirled, in 

 panicled ousters, 1' orr more broad. In rather dry ground, much branched 

 above, l°-3° high, the only species which extend [V. to Illinois, Sfc. 



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

 leaves, and fewer flowers only 1' broad. 



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

 ovate or heart-shaped 5-nerved leaves, and corolla ] J' broad. 



» * » Flowers rose-purple or white, 5-6-parted, 1' or less broad, scattered singh 

 on long peduncles: stems slender 5' -20' high, commonly forking, scarcely 

 angled. All grow in salt marshes or near the coast. 



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

 base, and lance-spatulate calyx-lobes longer than the mostly white corolla. 



S. Stell&ris. From Mass. S. : has lance-oblong leaves or the upper Imear, 

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



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

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



« * « * Flowers bright rose-color or with white varieties, 7-1 2-parted, ya-y hand- 

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



8. chloroldes. Along sandy ponds, from Plymouth, Mass. S. : leaves 

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



S. gentianoides. Wet barrens S. : stem-leaves linear ; flowers short- 

 pednncled or sessile, clustered. 



