684 ORDEU 95 GENTIANACEJE. 



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

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

 setaceous, shorter than its short tube; cor. segm. 6, elliptic. In La. (Hale, near 

 Covington). St. 2f high. Lvs. 2' long. 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 \ IV, as long 

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

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



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

 than the leaves; branches opposite, suberect; Ivs. linear and lance-linear, lower 

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

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

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

 Car. Stem a foot high, few or many-flowered. Leaves 912" 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. ERYTHRvE'A, Renealm. (Gr. t-pv0poc, 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 twisted ; sty. 1 ; stig. bilamellate 

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

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



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

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

 little 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 

 sessile. Fls. lateral and terminal-central, the pedicels in the forks near i' long, 

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

 (E. pulchella Hook. Exacum 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 ihelong branches; sop. 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, G to 12' high. 

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

 ingii Oakes.) Eur. 



3 E. Centaurium Pers. Erect, branched above ; Ivs. 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. I' and less in length, half as wide, 3-veined. Fls. G ' long, 

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



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

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

 raarescent, tubular at base, limp 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, 

 revolutc or erect; styles short cr 0; capsule 2-valved, l~celled, many- 

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

 cymous. 



Corolla destitute cf folded r.npehd.ipcs and the segments entire Nos. 10, 1 



and tho segments fringed Nos. if, 8 



S Coroll- 1 v.-ith folded, often toothed appendages between the lobes, (a) 



