GENTIAS FA:,!ILY. 271 



•4- +- Stale {if any) and sHgmas persistent on thepod: anthers straight, 



2. FRASERA. Csdyx and corolla deeply 4-parted, wheel-shaped; divisions of the 



latter with a gluudular-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 and panicled flowers. 



3. GEXTIAKA. Calyx 4 - 5-cleft. Corolla'4-5-lobed, often with teeth or salient 



folds at the sinuses, usually withering-persistent. Stylo short ornone; stig- 

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

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



4. BARTON! A. Calyx 4-parted. Corolla deeply 4-cleft. Style none. Pod ob- 



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

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



§ 2. Leaves alternate, hmq petioled. Corolla mttk the lobes valvaie ojnd the edges 

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



B. JIENYANTHES. Calyx B-parted. Corolla very short-funnel-form, 5-lohed, 

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

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

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

 and bearing 3 oval or oblong leaflets. 



6. LIMN'ANTH5:MUJ1. 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 roiuid- 

 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. (T) ® 



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



S. panieul^ta. Low grounds S. : stem l°-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. laneeol&,ta. Prom New Jersey S. : taller, larger-flowered, with lancc- 

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

 corolla much exceeding the thread-shaped calyx-lobes. 



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

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

 exceeding the bristle-liko calyx-lobes. 



* » Floioers rose-pink, rarely white, with yellowish or greenish eye, 5-piirted, in 



panicled clusters, I'-or more broad. In rathtr dry around, much branched 

 (d)ove, l°-3° high, the only species which extend W. to Illinois, Sfc. 

 S. braelliita, chiefly S., has slightly angled steni, lineiar or narrow-oblong 

 leaves, 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-nerved leaves, and corolla 1^' brolid. 



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



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

 angled. All grow in salt marshr-s or near the coast. 

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

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



S. stellkris. From Mass. S. : has lance-ob'ong leaves or the upper linear, 

 and- linear caly.x-lobcs shorter than the rose-purple yellowifh eyed corolla. 



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

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



* » » » Flowers Inright rose-color or with white varieties, 7 - 1 2-parted, very hand- 



some, 1|' - 2' iroad : stems simple or sparingly branched, 1° - 2° high. 



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

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



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

 pedunclcd or sessile, clustered. 



