ERYTHRJSA. C. GENTIANACE^. 451 



lanceolate; cyme fastigiate, terminal; sep. linear, 3 times shorter than the 

 corolla ; cor. 5 6-parted, white, lobes obovate-oblong, obtuse. Pine barrens, 

 N. J. to Ga. Stem a foot high, branching near the summit. Leaves an inch 

 in length, closely sessile. Flowers few, generally pentamerous. 



3. S. CONCINNA. Wood. (Nov. sp.) Elegant Star Flower. 



St. 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 ; cat. 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. Stem a foot high, 

 few or many-flowered. Leaves 912" by I 3", Flowers 15" diam., of a deli- 

 cate blush-purple, the star in the centre yellow, bordered with green. Jl. Aug. 



4. S. STELLARIS. Ph. (S. gracilis. Ell. Chironia amoena. Raf.) 



St. erect, terete ; branches dichotomous, elongated, 1-flowered ; Ivs. lanceo- 

 late, acute, seg. of the ecJl. subulate, half as long as the corolla ; seg. of the cor. 

 obovate. Frequent in salt marshes, N. Y. to Flor. Stems somewhat angular, 

 12 18' high, with many forked divisions, forming a sort of loose corymb. 

 Leaves somewhat fleshy, 1 2' long, sessile. Flowers rose-color, with a yellow 

 star in the centre bordered with a purple ring. Aug. 



5. S. CALYCOSA. Ph. (Chironia dichotoma. Walter.) 



St. erect, leafy, few-flowered ; Ivs. oblong, 3-veined, obtuse ; fls. solitary, 

 7 9-parted ; col. leafy, longer than the corolla ; pet. oblanceolate. Fields and 

 meadows, N. Y. to Ga. Stem a foot high, subangular, with a few axillary, 

 spreading branches. Leaves 1 2' long, sessile, mostly obtuse, oval, thin. Flow- 

 ers large, terminal, often solitary, variable in the number of its parts, but mostly 

 in 7s. Corolla pyik-colored. Sepals acute. This species is quite variable. 



6. S. ANGULARIS. Ph. (Chironia. Linn.} Angular-stemmed Star Fl. 



St. quadrangular, with winged angles ; Ivs. ovate, amplexicaul, 5-veined ; 

 panicle corymbose; 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 i !', as long as the 

 internodes or often shorter. Flowers numerous, 1$ !' diam., deep rose-color, 

 the star in the centre greenish. July, Aug. 



7. S. CHLOROIDES. Ph. (Chironia dodecandra. Linn.) 



St. slender, weak, angular ; Ivs. lanceolate, erect ; branches few, 1-flower- 

 ed ; fls. 7 12-parted ; sep. linear, shorter than the corolla. An elegant plant, 

 with large, showy flowers, in wet grounds, Mass., R. I. ! to Car. The stem is 

 2 3f high, somewhat angular, with few, opposite, spreading branches. Leaves 

 1 !' long, opposite, entire, smooth, closely sessile, acute, veinless. Flowers 

 solitary, terminal. Corolla nearly 2' diam., much larger than the calyx, bright 

 purple, with a yellow base, segments spatulate, rounded at end, varying in 

 number with the other parts of the flower. June. 



Obs. The species of this genus are very ornamental, some of them perhaps among the most beautiful 

 of our native plants. 



2. ERYTHR^SA. Renealm. 



Gr. spvSpos red ; from the color of the flowers. 



Calyx 5, rarely 4-parted ; cor. infundibuliform, twisted and wither- 

 ing 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. St. subangular. Lvs. connate at base. Fls. cymose, roseate, 

 white or yellow. 



1. E, MUHLENBERGII. Griseb. (E. Centaurium. Beck ? E. pulchella. Hook. 



Chironia dubia. WilldJ) St. simple below, dichotomously branched above ; 

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

 a little longer than the calyx, segments oblong-lanceolate, acutish. N. Y., 

 Penn. Very rare. Stem 38' high, 1 3 times forked, sometimes with oppo 



