226 GENTIANACEAE. 



of 4 parts each. Calyx relatively large: lobes keeled, unequal, the inner ones 

 broader than the outer and hyaline or scarious-margined. Corolla salverform- 

 funnelform: lobes shorter than the tube, without plaits in the sinuses. Stigmas 

 very broad. 



1. A. crinitum (Froel.) Eaf. Stem 2-5 dm. tall, mostly branched: leaf -blades 

 ovate to lanceolate, mainly 2-5 cm. long, partly clasping: calyx 25-30 mm. 

 long: corolla sky-blue, 4-5 cm. long; lobes fimbriate: capsule about 3 cm. 

 long. M. S. Bare, in swamps and moist thickets. Limestones, schists, 

 Fall. FRINGED-GENTIAN. 



4. DASYSTEPHANA Adans. Annual, biennial, or perennial herbs. 

 Flowers in a compact terminal cyme and axillary cymes or solitary, the 

 whorls mainly of 5 parts each. Calyx persistent: lobes minute or foliaceous, 

 essentially equal. Corolla salverform, funnelform, or clavate, with neither 

 glands at the base of the tube nor filaments at the base of the lobes: lobes 

 much shorter than the tube, with plaits at the sinuses. Stigmas narrow. Cap- 

 sule stipitate. Fall. GENTIAN. 



Calyx-lobes spatulate to linear-lanceolate : corolla-lobes about as 



long as the plaits. 



Calyx-lobes ciliolate-scabrous : corolla rose-purple to blue. 1. D. Saponaria. 



Calyx-lobes smooth and glabrous : corolla greenish-white or 



purplish-green. 2. D. villosa. 



Calyx-lobes elliptic, oval or ovate : corolla-lobes minute or 



obsolete. 3. D. Andrewsii. 



1. D. Saponaria (L.) Small. Stem 3-8 dm. tall, glabrous: leaf -blades lanceo- 

 late to oblong or elliptic, 2.5-7.5 cm. long: calyx 15-20 mm. long; lobes spatu- 

 late to linear-spatulate, mainly shorter than the tube: corolla blue or purplish- 

 blue, 3.5-4 cm. long; lobes mainly shorter than the plaits: capsule-body fully 

 1.5 cm. long. S. Eather common, on moist shaded banks. Schists. 



SOAPWORT-GENTIAN. 



2. D. villosa (L.) Small. Stem 1-6 dm. tall, glabrous: leaf -blades spatulate 

 to obovate, oblong, or oval, 2-8 cm. long: calyx 25-30 mm. long; lobes linear 

 to linear-spatulate, longer than the tube: corolla greenish- white or purplish- 

 green, 4.5-5 cm. long; lobes much longer than the plaits: capsule-body 2.5-3 

 cm. long. S. Bather rare, in open woods. Schists. SAMPSON 'S-SNAKE- 



EOOT. 



3. D. Andrewsii (Griseb.) Small. Stem 3-6 dm. tall, glabrous: leaf -blades 

 lanceolate to linear-lanceolate or ovate-lanceolate, mainly 4-9 cm. long: calyx 

 8-18 mm. long; lobes elliptic, oval, or ovate, shorter than the tube, unequal: 

 corolla blue, or purplish, or rarely white, 2.5-3.5 cm. long; lobes minute or 

 obsolete : plaits conspicuous : capsule-body 2-2.5 cm. long. Common, in 

 swamps and moist thickets. CLOSED-GENTIAN. 



5. OBOLABIA L. Perennial small, but stout herbs. Leaves mere 

 dilated scales. Flowers in spike-like cymes, each subtended by a dilated bract. 

 Calyx-lobes 2, dilated upward. Corolla white, pinkish, or purplish, broadly 

 funnelform: lobes 4, about as long as the tube. 



1. O. virginica L. Plant purplish-green, 5-20 cm. tall: leaves (scales) 5-10 

 mm. long, the upper ones broadened upward, longer than the lower ones: calyx- 

 lobes spatulate or oblong- spatulate : corolla 7-10 mm. long; lobes nearly as 

 long as the tube, acute : capsules 5-6 mm. long. S. Kare, in rich woods. 

 Schists. Spr. PENNYWORT. 



6. BABTONIA Muhl. Annual or biennial, slender herbs. Leaves mere 

 narrow scales. Flowers in racemose or panicled cymes, or solitary, each sub- 



