GENTIANACEAE 247 



FAMII.Y 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 salverform. i. Erythraea. 



Corolla rotate. 2. Sabbatia. 



Style wanting or very short : anthers straight at maturity. 

 Corolla funnelform, 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. ERYTHRAEA Neck. 



Calyx Vi or 14 as long as the corolla: corolla-lobes 5-6 mm. long. 



1. jE. Centauriutn. 

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



2. E. pulchella. 



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

 HERB. (Man. p. 729; I. 'P. f. 28J2.) In waste places, N. S. and Que- 

 bec to 111. Nat. from Fu. — Pennsylva7iia : Northampton, Nazareth. 



2. Erythraea pulchella (Sw.) Fries. Branching Centaury. (Man. 

 p. 729 ; I. F. /. 28^3.) In fields and waste places, N. Y. to Pa. and Md. 

 Also in the W. Indies. Nat. from Eu. — Pennsylvania : Chester ; Lan- 

 caster ; Lebanon ; Perry. 



2. SABBATIA Adans. 



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



I. .S". angularis. 

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

 nate. 2. 6. campdnulata. 



1. Sabbatia angularis (L.) Pursh. BiTTER-bloom. Rose-pink. 

 (Man. p. 730 ; I. F. /. 28^8.) In rich soil, N. Y. and Pa. to Out., Mich., 

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

 Delaware ; Chester ; Lancaster ; Ai,i.egheny. 



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

 p. 730 ; I. F.y. 2S6J.) 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. crinita. 



Corollas about 1.5-2 cm. long ; lobes entire. 2. G. quinque/otia. 



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. Andrew sii. 



