GENTIANACEAE 247 



Family 3. GENTIANACEAE Dumort. Gentian Famii,y. 



Corolla-lobes convolute in the bud : stem-leaves not scale-like. 

 Style elongated : anthers twisted or much curved at maturity. 

 Corolla salverf orm. i . Erythraea. 



Corolla rotate. 2. Sabbatia. 



Style wanting or very short : anthers straight at maturity. 

 Corolla funnelf orm, club-shaped or campanulate, without glands, scales or 



nectariferous pits. 3. Gentiana. 



Corolla rotate, with i or 2 fringed glands at the base of each lobe. 



4. Frasera. 

 Corolla-lobes imbricated in the bud : stem-leaves mere scales. 

 Calyx of 2 sepals : corolla-lobes relatively short. 5. Obolaria. 



Calyx of 4 sepals : corolla lobes relatively long. 6. Bartonia. 



1. ERVTHRAEA Neck. 



Calyx Ji or X as long as the corolla: corolla-lobes 5-6 mm. long. 



1. E. Ceniauriufn. 

 Calyx about H as long as the corolla : corolla-lobes 3-4 mm. long. 



2. E. pulchella. 



1. Erythraea Centaurium (L. ) Pers. Lbsser Centaury. Bitter- 

 HBRB. (Man. p. 729 ; I. F. _/^ 2852.) In waste places, N. S. and Que- 

 bec to 111. Nat. from Ku. — Pennsylvania : Northampton, Nazareth. 



2. Eiythraea pulchella (Sw.) Fries. Branching CENTAURY. (Man. 

 p. 729 ; I. F. /; 28JJ.) In fields and waste places, N. Y. to Pa. and Md. 

 Also in the W. Indies. Nat. from Eu. — Pennsylvania : CHESTER ; IvAN- 

 CASTER ; Lebanon ; Perry. 



2. SABBATIA Adans. 



Leaf-blades broad, cordate-clasping : stems 4-angled, the branches opposite. 



1. 5. angularis. 

 Leaf -blades narrow, rarely sessile : stems terete or nearly so, the branches alter- 

 nate. 2. .S'. campanulata. 



1. Sabbatia angularis (L.) Pursh. BiTTER-bi,oom. RosE-pink. 

 (Man. p. 730 ; I. F. /. 2858.) In rich soil, N. Y. and Pa. to Ont., Mich., 

 Fla., the Ind. Terr, and La. — Pennsylvania: Northampton; Bucks; 

 Dbi,aware ; Chester ; Lancaster ; Ai,i,egheny. 



2. Sabbatia campanulata (L. ) Torr. Si,ENDER Marsh Pink. (Man. 

 p. 730 ; I. F./. 25dj.) In salt marshes and along brackish rivers, rarely 

 in fresh-water swamps, eastern Mass. to Fla. and La. Also in Cuba. 

 — Pennsylvania : Bucks, Tullytown. 



3. GENTIANA L. 



Plants annual : corolla without teeth or plaits at the sinuses. 

 Corollas about 5 cm. long ; lobes fringed. i. G. criniia. 



Corollas about 1.5-2 cm. long ; lobes entire. 2. G. quinquefotia. 



Plants perennial : corolla with toothed or lobed plaits at the sinuses. 

 A. Calyx-lobes and leaf-margins scabrous or ciliate. 

 Corolla-lobes as long as the plaits or larger. 3. G. Saponaria. 



Corolla-lobes minute or obsolete, the plaits relatively large. 



4. G. Andrewsii. 



