116 GENTIAN ACEiE. Sabbalia. 



S. Boykini, 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, Boykin (in herb. Torr.) ; also in herb. Muhl. Little known. 

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



4. E "tTSTOMA, Salisb. (From ev, azojia, good mouth, i.e. mouth 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. 621. Gmtiana exaltata, L. Spec. ed. 2, 331 ; 

 Descourt, Ant. t. 15. Lisianthus exaltatus, Lam. III. i. 478. L. glaucifolius, Jacq. Ic. Rar. 

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

 Uranantlws f/laucifolius, Benth. PI. Hartw. 46. — Southern borders of the United States, from 

 Florida and Texas to California. (Mex., W. Ind.) 



B. Russellianum, Griseb. I.e. Afoot 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 glaucifolius, Nutt. in Trans. Am. Phil. Soc. n. ser. v. 197, not 

 Jacq. L. Russellianus, Hook. Bot. Mag. t. 3626. — Nebraska to Texas. Very showy. 

 • Var. graoile. Smaller: leaves lanceolate : capsule not pointed. — E. gracile, Engelm. 

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



5. GENTIAN" A, Tourn. 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. Gentianella. 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. barbellata. — Gentianella, &c, Borkhausen. 



# (Fringed Gentians.) Flowers large or middle-sized, solitary, mostly 4-merous: corolla cam- 

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

 the bases of the filaments. — § Crossopetalum, Frcelich, Grisebach. 

 -i— Flower on a naked and usually long peduncle terminating the stem or branches, not bracteate 

 at base : filaments naked : root annual : calyx (except in 67. 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 decurrent keels. 



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

 G. ventrioosa, 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 House and Hudson's Bay, Drummond. Little known and not since 

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

 related to G. crinita. 



