116 GENTIANACE^. Sabbatia. 



S. Bo^kini, Gray. A foot high, nearly simple : cauline leaves lanceolate-oblong or the 

 lower elliptical, 3-nerved (an inch or two long) ; the uppermost lanceolate: flowers 1 to 7 

 in the cluster ; the bracts oval or oblong : calyx-lobes lanceolate, much shorter than the 

 corolla; lobes of the latter oblong-obovate, half inch long. Chapm. Fl. 354. Middle or 

 Upper Georgia, Boi/Lin (in herb. Torr.) ; also in herb. Muhl. Little known. 

 S. SIMPLEX, Bertol. Misc. x. t. 3, is Rhexia stricta. 



4. EtJTSTOMA, Salisb. (From sv, arofjict, good mouth, i.e. month of good 

 size, alluding to the open-mouthed corolla.) Glaucous and large-flowered an- 

 nuals ; with more or less clasping and connate thickish leaves, slender terminal 

 and more or less paniculate .one-flowered peduncles, and bluish purple corolla vary- 

 ing to white ; the lobes commonly erose-denticulate. Only the following species. 



E. exaltatum, Griseb. Lower than the next species : leaves oblong : lobes of the 

 corolla nearly oblong (barely an inch in length), twice the length of the tube: style little 

 longer than the stigmas: capsule elliptical-oblong, very obtuse. DC. Prodr. ix. 51; 

 Lindl. Bot. Reg. xxxi. t. 13 ; Gray, Bot. Calif, i. 021. Gcntiana exaltata, L. Spec. ed. 2, 331 ; 

 Descourt, Ant. t. 15. Lisianthus exultatus, Lam. 111. i. 478. L. glancifoliits, Jacq. Ic. Rar. 

 t. 33. Eustoma silcnifolium, Salisb. Parad. Lond. t. 34; Don, Syst. iv. 211, excl. syn. Nutt. 

 Ur/manthus rjfaucifolius, Benth. PI. Hartw. 40. Southern borders of the United States, from 

 Florida ami Texas to California. (Mex., "W. Ind.) 



E. Russellianum, Griseb. 1. c. A foot or two high : leaves from ovate- to lanceolate- 

 oblong : lobes of the ample lavender-purple corolla obovate (inch and a half long), 4 times 

 longer than the tube: style elongated: capsule oblong, usually pointed : anthers hardly 

 curving in age. Lisianthus ylaucifoUus, Nutt. in Trans. Am. Phil. Soc. n. ser. v. 197, not 

 Jacq. L. Russellianus, Hook. Bot. Mag. t. 3G20. Nebraska to Texas. Very showy. 



Var. gracile. Smaller: leaves lanceolate : capsule not pointed. E. r/racilc, Engelm. 

 in Fl. Calif. 1. c. S. Texas, Berlandier, &c. (Mex.) 



5. G-ENTIANA, Tonrn. GENTIAN. (Gentius, king of Illyria.) Erect 

 herbs (of the cooler parts of the world) ; with chiefly sessile leaves, and con- 

 spicuous flowers of various colors, produced in summer or autumn ; commonly 

 expanding only in sunshine or at mid-day. Seeds in most of our species exceed- 

 ingly numerous and borne over the whole inner surface of the capsule (as first 

 remarked by the late Prof. H. J. Clark, in Gray, Man. ed. 2, 1856, 345). Herb- 

 age and especially the roots very bitter. 



1. GF.NTIANELLA. Corolla (not rotate) destitute of extended plaits or lobes 

 or teeth at the sinuses : anthers usually versatile (introrse, at length retrorsely 

 reversed) : stigmas distinct or only casually united : root annual in all ours except 

 in G. barbeUata. Gentianella, &c., Borkhausen. 



* (FRINGED GENTIANS.) Flowers large or middle-sized, solitary, mostly 4-merous: corolla cam- 

 panulate-funnelform, its lobes usually fimbriate or crose. not crowned: a row of glands between 

 the bases of the filaments. Crossopetatum, Frcelich, Grisebach. 



4 Flower on a naked and usually lone; peduncle terminating the stem or branches, not bracteate 

 at base: filaments naked: root annual : calyx (except in G. simplex) ovate-acuminate in the bud 

 and with acutely carinate lobes, the two exterior longer as well as narrower and more acuminate, 

 the tube sharply angled by the deciurent keels. 



-H- Corolla enclosed in the ventricose wing-angled calyx? 



G. ventricosa, Griseb. A foot high : leaves ovate-oblong : calyx ovoid and 4-wing- 

 angled ; the two external lobes much acuminate; the two internal barely acute, rather 

 longer than the campanulate deeply 4-cleft corolla : ovate-oblong lobes of the latter regu- 

 larly " crenate-fimbriate" (or in the figures sharply serrate): ovary not stipitate. Gent. 

 259, in Hook. Fl. ii! 65, 1. 152, & DC. Prodr. ix. 102. Grand Rapids of the Saskatchewan, 

 between Cumberland Plouse and Hudson's Bay, Drummond. Little known and not since 

 collected : apparently described and figured from undeveloped specimens, perhaps nearly 

 related to G. crinita. 



