GENTIANACE^E. (GENTIAN FAMILY.) 385 



No. 1. (Chironia lanceolata, Walt. S. corymbosa, Baldw.) — Wet pine bar- 

 rens, from New Jersey southward. 



*~ +- Corolla rose-pink, rarely white, with a yellowish or greenish eye: stem erect, 

 1° -3° high, pyramidally many -flowered: branches opposite : peduncles short. 



3. S. braehlata, Ell. Stem slightly angled, simple below (L°-2° high) ; 

 leaves linear and linear-oblong, obtuse, or the upper acute ; branches rather few- 

 flowered, forming an oblong panicle ; calyx-lobes nearly half shorter than the 

 corolla. (S. concinna, Wood, ex char.) — Dryish grassy places, Virginia (Indi- 

 ana, Wood), and southward. — Corolla rather smaller, and its lobes narrower 

 than in the next. 



4. S. anglllaris, Pursh. Stem somewhat ^-winged-angled, much branched 

 above (l°-2^° high), many-flowered ; leaves ovate, acutish, 5-nerved, with a 

 somewhat heart-shaped clasping base ; calyx-lobes one third or half the length of 

 the corolla. — Dry ground, New York to Illinois and southward. Corolla l^ r 

 wide ; the lobes obovate. 



-i- •»- Corolla rose-purple or white: stems (5' -20' high) slender, loosely and often 

 alternately branched, or merely forked, terete or scarcely A-angled : peduncles elon- 

 gated and 1 -flowered. 



5. S. calyedsa, Pursh. Diffusely forking, pale ; leaves oblong or lance-ob- 

 long, narrowed at the base; calyx-lobes foliaceous, spatulate-lanceolate (f'-l/ long), 

 exceeding the almost white corolla. — Marshes, E. Virginia, and southward. 



6. S. Stellaris, Pursh. Loosely branched and forking ; leaves oblong- or 

 ovate-lanceolate, or the upper linear ; calyx-lobes awl-shaped-linear, varying from 

 half to nearly the length of the bright rose-purple corolla. — Salt marshes, Massachu* 

 setts to Virginia, and southward. Too near the next. 



7. S. gracilis, Salisb. Stem very slender, at length diffusely branched ; 

 the branches and long peduncles filiform ; leaves linear, or the lower lance-linear, 

 the uppermost similar to the setaceous calyx-lobes, which equal the rose-purple 

 corolla. (Chironia campanulata, L.) — Brackish marshes, Nantucket (Oakes), 

 banks of lower Delaware River (Mr. Cooley,Mr. Diffenbaugh), and southward. 



* * Corolla 9-12-parted, large (about 2' broad). (Lapithea, Grisebach.) 



8. S. chloroides, Pursh. Stem (l°-2° high), loosely panicled above; 

 the peduncles slender, 1-flowered ; leaves oblong-lanceolate ; calyx-lobes linear, 

 half the length of the deep rose-colored (rarely white) corolla. — Borders of 

 brackish ponds, Plymouth, Massachusetts, to Virginia, and southward. — One 

 of our handsomest plants. 



2. ERYTHRilA, Pers. Centaury. 



Calyx 4- 5-parted, the divisions slender. Corolla funnel-form or salver-form, 

 with a slender tube and a 4 - 5-parted limb. Anthers exserted, erect, twisting 

 spirally. Style slender, single: stigma capitate or 2-lipped. — Low and small 

 branching annuals, chiefly with rose-purple or reddish flowers (whence the name, 

 from epvOpos, red) ; in summer. All our Northern species were probably intro- 

 duced, and occur in few localities. 



1. E. Centaurium, Pers. (Centaur v.) Stem upright, corymbose! y branched 

 above ; leaves oblong or elliptical, acutish ; the uppermost linear ; cijmes dus- 



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