Gentiana Gentianaceae 757 



County. This field had not been cultivated for more than 20 years and had 

 reforested mostly to tulip trees 4-6 inches in diameter. It prefers rather 

 sandy soil of exposed places, although it is often found in places with a 

 thick cover of leaves but in such situations it is never abundant. It has 

 been reported as far north as Parke and Putnam Counties. 

 N. J. to 111., southw. to Ga. and Tex. 



6509. GENTIANA [Tourn.] L. Gentian 



Corolla without plaits, lobes or teeth in the sinuses. 

 Peduncles more than 2 cm long; corolla lobes fringed. 



Leaves ovate to ovate-lanceolate; corolla lobes deeply fringed around the summit; 



ovary lanceolate 1. G. crinita. 



Leaves linear to lance-linear; corolla lobes fringed at the sides, the summit spar- 

 ingly and shortly fringed or merely dentate ; ovary elliptic 2. G. procera. 



Peduncles less than 2 cm long; corolla lobes not fringed. 



Calyx lobes mostly 2-3.5 mm long. (See excluded species no. 499, p. 1081) 



G. quinque folia. 



Calyx lobes mostly 4-8 mm long 3. G. quinquefolia var. occidentalis. 



Corolla with plaits in the sinuses. 



Margins of leaves and calyx lobes scabrous or ciliate; flowers blue; seeds winged. 

 Corolla nearly truncate at the summit, the narrow lobes almost obsolete or at least 

 2.5-3 mm shorter than the plaits; margins of the wide, whitish, wedge-shaped 



plaits minutely fimbriate-dentate 4. G. Andrewsii. 



Corolla with distinct, broad, rounded or acute lobes 1.5-10 mm long; margins of 

 the less conspicuous 2-cleft plaits dentate. 

 Stamens cohering more or less in a ring about the style; calyx lobes oblanceo- 

 late, widest about the middle, usually 1.5-3 mm wide and 7-12 mm long, 

 strongly ciliate on the margins, rather abruptly acuminate; stems usually 

 glabrous or some internodes more or less puberulent in lines; corolla 3-5 cm 

 long, the erect, mostly acute lobes 2-3 mm longer than the whitish plaits. 



5. G. Saponaria. 



Stamens free (sometimes adhering in dried specimens because of pressure ap- 

 plied in drying) ; calyx lobes linear, usually 6-8 mm long and about 1 mm 

 wide, the margins scabrous or somewhat minutely ciliate, long taper-pointed 

 from about the middle; entire stem usually puberulent in lines; corolla 

 usually 2.5-3.5 cm long, the conspicuous, acute, slightly spreading lobes 5-7 



mm longer than the bluish plaits 6. G. puberula. 



Margins of leaves and calyx lobes smooth; flowers white or yellowish; seed winged 

 or wingless. 

 Base of leaves cordate and closely clasping; calyx lobes ovate or narrow-ovate; 

 corolla lobes broad, about twice the length of the broad, toothed appendages; 



seed winged 7. G. flavida. 



Base of leaves narrowed; calyx lobes linear, unequal; corolla lobes ovate, much 



exceeding the small, sparingly toothed appendages ; seed wingless 



8. G. villosa. 



1. Gentiana crinita Froel. Fringed Gentian. Map 1622. An infre- 

 quent to common plant in open, springy places, marshes, interdunal flats 

 and on the sandy borders of sloughs in the dune area. This is a much 

 admired plant and attempts to naturalize it usually fail because it is so 

 exacting in its habitat. It was formerly common in certain marshes but 

 since these have been grazed it has disappeared or only a few plants have 

 been able to persist. 



Cent. Maine to N. Dak., southw. to Ga., Ohio, and Iowa. 



