584 Obdbk 05.— GENFIANACE^E. 



the loaves; 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. Fls. smaller than any hero noticed, 

 about 7" broad, white. 



9 S. angularis Ph. St. quadrangular, witli winged angles - Ivs. ovate, amplezicaidt 

 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 tho stem, 1 — 2' by \ — \V , as long 

 as the internodes or often shorter. Flowers numerous, 1| — W diam., deep rose- 

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



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

 than the leaves ; branches opposite, suberect ; to*, 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 ; tor. &-parted, segments obloug- 

 ©bovate, obtuse, light purple. — Dry, grassy, prairies, la. abundanS, alsoTenn. and 

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

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

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



2. ERYTHRvG'A, Renealm. (Gr. ipvOpcg r red.) Calyx 5, rarely 4- 

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

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

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

 or capitate ; caps. 2-valved, 1 or partly 2 -celled. — (T) St. subangular. 

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



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

 lvs. ovate-long, obtusish; cymes loose, diclwtomoics ; fls. pedicellate; cor. tube a 

 little longer than the calyx, segments oblong-lanceolate, acutish. — N. Y. t Penn. 

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

 6essile. Fls. lateral and terminal-central, the pedicels in tho forks near^' long, 

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

 (E. pulchella Hook. Exaum puichella Ph. ?} 



2 E. spicata Pers. St. dichotomously branched, erect ; lvs. 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. lincar-oblcng, finally twisting out- 

 wards.: — (J) Coast of Maryland (Pickering). Sandy margins of tho seashore, 

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

 Lvs. 1' long, fleshy, pale green. Cor. 8" long, voso- or nearly white. (E_ Pieker- 

 ingii Oakes.) § Eur. 



3 E. Centaurium Per3. Erect, branched above ; lvs. oblong, acutish at each end ; 

 fls. 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. GENTIAN A Tourn. (To Gentius, ting of Illyria, who discovered 

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

 maresccnt, 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 r inserted in the corolla tube ; stigmas 2, 

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

 seeded. — Herbs of various habit. Lvs. opposite. Fls. terminal or 

 cymous. 



§ Corolla destitute of folded appendages — and the segments entire Nob. 10, 1 



— and the segments fringed No*. 'I, 8 



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



