584 ORDER 95. GENTIANACE.S!. 



the leaves ; branches opposite ; Ivs. ovate, acuminate-cuspidate ; 5- veined, clasp- 

 ing and subconnate at base, the upper lanceolate ; panicle fastigiate ; cal. segm. 

 setaceous, shorter than its short tube ; cor. segm, 5, elliptic. In La. (Hale, near 

 Covington). St. 2f high. Lvs. 2' long, t Fls. smaller than any here noticed, 

 about 7" broad, white. 



9 S. angularis Ph. St. quadrangular, with winged angles ; Ivs. ovate, amplexicaul 

 5-veined; panicle corymbous; ped. elongated; sep. lance-linear, half as long as 

 the corolla, distinct almost to the base ; cor. segments obovate, obtuse. Wet 

 meadows and prairies, Can. to Car. and Ark. Stem 10 18' high, much branched, 

 branches opposite. Leaves closely embracing the stem, 1 2' by H', as long 

 as the internodes or often shorter. Flowers numerous, 1^ IV diam., deep rose- 

 color, the star in the center greenish. Jl., Aug. (Chirdnia, L.) 



10 S. brachiata Ell. St. slender, subquadrangular, internodes 2 4 times longer 

 than the leaves ; branches opposite, su*berect ; Ivs. linear and lance-linear, lower 

 ones ovate, all acutish, sessile ; panicle oblong ; cal.^ segments linear, twice longer 

 than the tube, twice shorter than the corolla; cor. 5 -parted, segments oblong- 

 obovate, obtuse, light purple. Dry, grassy, prairies, la. abundant, also Tenn. and 

 Car. Stem a foot high, few or many-flowered. Leaves 9 12" by 1 3". Flow- 

 ers 15" diam., of a delicate blush-purple, the star in the center yellow, bordered 

 with green. Jl., Aug. (S. concinna, 2d Edit.) 



2. ERYTHR/E'A, Renealm. (Gr. epvOpog, red.) Calyx 5, rarely 4- 

 parted, angular ; corolla funnel-form, twisted and withering above the 

 capsule, tube cylindric, limb 5 4-parted ; sta. 5 4, inserted near the 

 top of the tube ; anth. exserted, spirally Uvisted ; sty. 1 ; stig. bilamellate 

 or capitate; caps. 2-valved, 1 or partly 2-celled. St. subangular. 

 Lvs. connate at base. Fls. cymous, roseate, white or yellow. 



1 E. Muhlenbergii Griseb. St. simple below, dichotomously branched above ; 

 Ivs. ovate-long, obtusish ; cymes loose, dichotomous ; fls. pedicellate ; cor. tube a 

 tittle longer than the calyx, segments oblong-lanceolate, acutish. N. Y., Penn. 

 Very rare. St. 3 to 8' high, 1 to 3 times forked. Lvs. 4 to 7'' by 1 to 3", closely 



Fls. 



r lateral and terminal-central, the pedicels in the forks near ^' long, 

 the others shorter. Cor. bright purple, tube yellowish green, slender. JL Sept. 

 (E. pulchella Hook. Exaum pulchella Ph. ?) 



2 E. spicata Pers. St. dichotomously branched, erect ; Ivs. clasping and slightly 

 decurrent, lower ones oval, obtuse, upper lanceolate, acute; fls. sessile, mostly 

 lateral on the long branches ; sep. linear, acute, erect ; cor. tube slender, contracted 

 at the neck, lobes spreading, obtuse ; anth. linear-oblong, finally twisting out- 

 wards. Q Coast of Maryland (Pickering). Sandy margins of the seashore, 

 Nantucket (Oakes). "Whole plant very smooth and intensely bitter, 6 to 12' high. 

 Lvs. 1' long, fleshy, pale green. Cor. 8" long, rose or nearly white, (fe. Picker- 

 ingii Oakes.) Eur. 



3 E. Centaurium Pers. Erect, branched above ; Ivs. oblong, acutish at each end ; 

 jfts. subsessile in the loosely corymbed cymes ; cor. tube twice longer than the calyx, 

 lobes short, oval, obtuse, erect-spreading. Fields, Oswego, N". Y. and Can. St. 

 5 to 10' high. Lvs. 1' and less in length, half as wide, 3-veined. Fls. 6'' long, 

 rose-color, its yellow anthers exserted, and soon twisted. Aug. Eur. 



3. GENTIA^NA Tourn. (To Gentius, king of Illyria, who discovered 

 the tonic virtues of this genus.) Calyx 5 to 4-parted or cleft ; corolla 

 marescent, tubular at base, limb 4 to 5-parted, segments either spread- 

 ing, erect or convergent, often furnished with intermediate, plicate 

 appendages ; stamens 5 to 4, inserted in the corolla tube ; stigmas 2, 

 revolute or erect ; styles short or ; capsule 2-valvcd, 1-celied, many- 

 seeded. Herbs of various habit. Lvs. opposite. FJs. terminal or 

 cymous. 



Corolla destitute of folded appendages and the segments entire Nos. 10, 1 



and tho segments fringed Nos. 2, S 



Corolla with folded, often toothed appendages between the lobes, (a) 





