6l2 



GENTIANACEAE. 



10. 



[VOL. II. 



Sabbatia dodecandra (L.) B.S.P. 

 Large Marsh Pink. (Fig. 2864.) 



Chironia dodecandra L. Sp. PI. 190. 1753. 

 Chironia chloroidcs Michx. Fl. Bor. Am. x: 147. 1803. 

 Sabbatia chloroides Pursh, Fl. Am. Sept. 138. 1814. 

 Sabbatia dodecandra B.S.P. Prel. Cat. N. Y. 36. 1888. 

 Stem i-2 high, little branched or simple, terete 

 or nearly so, the branches alternate. Basal leaves 

 spatulatc, obtuse, i#'-3' long; stem leaves lanceo- 

 late or oblong-lanceolate, acute, the uppermost 

 usually narrowly linear; flowers few, pink, some- 

 times white, solitary at the ends of the branches 

 or peduncles, i> '-2 Abroad; calyx-lobes narrowly 

 linear, about one-half as long as the 9-12 spatulate- 

 obovate corolla-segments; anthers coiled; style 

 deeply 2-cleft, its divisions clavate; capsule globose- 

 oval, 3" high. 



In sandy borders of ponds and along: salt marshes, 

 Massachusetts to Florida and Alabama, near the coast. 

 July-Sept. 



3. EUSTOMA Salisb. Parad. I^ond. pi. j/. 1806. 



Erect usually branched glaucous annual herbs, with opposite sessile or clasping entire 

 leaves. Flowers large, blue, purple or white, long-peduncled, axillary and terminal, solitary 

 or paniculate. Calyx deeply 5-6-cleft, the lobes lanceolate, acuminate, keeled. Corolla 

 broadly campanulate, deeply 5-6-lobed, the lobes oblong or obovate, usually erose-denticu- 

 late, convolute in the bud. Stamens 5-6, inserted on the throat of the corolla; filaments 

 filiform; anthers oblong, versatile, at length recurved, or remaining nearly straight. Ovary 

 i -celled; style filiform; stigma 2-lamellate. Capsule oblong or ovoid, 2-valved. Seeds small, 

 numerous, fovcolatc. [Greek, open-mouth, referring to the corolla.] 



Two species, natives of the southern United States, 

 Mexico and the West Indies. 



i. Eustoma Russellianum (L,.) Griseb. 

 Russell's Eustoma. (Fig. 2865.) 



Lisianthus Russellianus Hook. Bot. Mag. pi. j6a6. 1839. 

 Lisianthus glaucifolius Nutt. Trans. Am. Phil. Soc. 



( II. ) 5: 107. 1833-37. Not Jacq. 1786. 

 E. Russellianum Gnseb. in DC. Prodr. 9: 51. 1845. 



Stem terete, rather stout, i-2# high. Leaves 

 oblong or ovate-oblong, 3~5-nerved, the upper 

 usually acute at the apex, cordate-clasping at the 

 base, T-W-s' long, the lower usually obtuse at the 

 apex and narrowed to a sessile or slightly auricled 

 base; peduncles i'-4' long, stout, bracted at the 

 base, the bracts lanceolate-subulate, small; flowers 

 2 x -3' broad; calyx-lobes long-acuminate, shorter 

 than the purple corolla; corolla-lobes obovate, about 

 4 times as long as the tube; style slender; anthers 

 remaining nearly straight; capsule oblong, pointed. 



On prairies, Nebraska to Louisiana, Texas and 

 Mexico. May-Aug. 



4. GENTIANA L. Sp. PI. 227. 1753. 



Erect mostly perennial and glabrous herbs, with opposite or rarely verticillate, entire 

 sessile or short-petioled leaves. Flowers blue, purple, yellow or white, solitary or clustered, 

 terminal or axillary. Calyx tubular, 4-7- (usually 5-) cleft. Corolla tubular, clavate, cam- 

 panulate, salverform or funnelform (rotate in some exotic species), 4~7-lobed, often with 

 membranous plaits in the sinuses, the lobes entire or fimbriate. Stamens as many as the 

 lobes of the corolla and inserted on its tube, included; anthers connate into a tube, or 

 separate, not recurved or coiled. Ovary i-celled; ovules very numerous; style short or none; 

 stigma cleft into 2 lamellae. Capsule sessile or stipitate, 2-valved. Seeds numerous, 

 sometimes covering the whole inner wall of the capsule, wingless or winged. [Named for 

 King Gentius of Illyria.] 



About 300 'species, mostly natives of the north temperate and arctic zones and the Andes of 

 South America. Besides the following, some 30 others occur in the western parts of North America. 



i 



