454 C. GENTIANACEA:. Swkrtia. 



8. G. DETONSA. Shorn or Slightly-f ringed Gentian. 



SI. nearly strict, simple or branched ; Lis. oblong-lanceolate or linear, the 

 lowest rosulate, spat ill ate ; pcd. l-llo\vered, very long, subsolitary; cal. 4( — 5)- 

 cleft, lobes ovate and lanceolate, nearly equaling the corolla; cor. lobes round- 

 ish-obtuse, ciliate and crenate-ciliatp, erect-spreading; stig. distinct. — N. Y., 

 Wis. Zy«;;//rt?//.'N. to Hudson's Bay. A fine species, with large blue flowers. 

 Stem a tool high. Leaves 1 — -Zh' by 1 — 3'', tapering to an acute point. Pedun- 

 cles 4 — 7' long, each with a single large, erect, showy flower. Cor. 15 — 20" 

 long, obconic or bell-shaped, blue. 



6. CENTAURELLA. 



Name u Latin (iimiiuitivc ofCenfaurca. 



Flowers tetrainerous ; sepals appressed ; corolla subcampanulate ; 

 petals slightly united, nearly erect, stigma thick, glandulous, some- 

 what bifid; capsule 1 -celled, 2-valved, invested bj the permanent 

 calyx and corolla ; seeds many. — ©iV. American^ sloider.^ erect herbs 

 ivilh scale-like leaves and small tchile fiowers. 



1. C. AUTUMNALis. Piirsh. (Bartonia tcnella. Mtihl. C. paniculata. Mr.) 

 Screws/ cm. — Sf. smooth, branching above, branches subdividided ; Irs. 



subulate, minute; panicle erect, many-flowered; cal. equaling the corolla; sty. 

 much shorter than the ovary. — A slender and nearly naked plant, 5- -8' high, of 

 a yellowish-green color. Native in wet grounds, Mass. to Ga. Stem square, 

 often twisted, with very minute, bract-like leaves, which are mostly opposite. 

 Peduncles opposite or terminal, simple or branched. Pedicels bracteate at base, 

 \' in length. Calyx segments linear-lanceolate, acute, shorter than the oval 

 segments of the corolla. Cor. white, small, bearing the stamens at its clefts. Aug. 

 /?. (cstivaUs. (C. aestivalis. Ph.) Cor. segments oblong, obtusish, twice longer 

 than the calyx ; ova. attenuated at apex. — In Penn. Pnrsh. 



2. C. MosERi. Stendel. Moscr^s Centanrclla or Screw-stem. 



Cyme racemiform ; branches alternate, spreading, racemiform ; cor. seg- 

 ments ovate, acute, twice longer than the calyx segrments; or^ry oblong, obtuse; 

 sty. 0; Zr.s. mostly alternate. — In Penn., Moser, in DC. Prod. 9; 121. 



7. HALENIA. Borkh. 



Flowers tetramerous ; corolla short campanulate, petals spurred at 

 base, with glands at the base of the spur within ; stigmas 2, termi- 

 nating the acuminate ovary ; capsule 1 -celled : seeds indefinite, fixed 

 to the sutures of the valves. — Erect^ branching. 



H. DEFLEXA. Griseb. (Swertia corniculata. Mx. S. deflexa. Sm.) Fcl- 

 u-ort. — St. erect, leafy; Ivs. 3 — 5-veined, radical ones oblong-spatulate, 

 tapering into a petiole, cauline ones oblong-lanceolate, acute, sessile ; spurs 

 cylindric, obtuse, deflexed, half as long as the corolla. — @ Swamps, Can., Ban- 

 gor, Maine, Miss Towlel N. Y., rare. Stem about 18' high, obtusely 4-angled, 

 smooth, with few branches above. Leaves opposite, IJ — 2' long, I as wide, 

 smooth. Flowers greenish-yellow, in terminal fascicles. Sepals linear-lanceo- 

 late, half as long as the petals. Corolla persistent, with 4, spreading horns or 

 spurs descending betwen the sepals. Seeds numerous, obtuse, yellow. Aug. 



8. SWERTIA. 

 Calyx 5 — 4 -parted ; cor. maresccnt, rotate, 5 — 4-parted, without 

 crown or folds, each segment with a glandular pit fringed at the mar- 

 gin ; sta. 5 — 4, inserted in the throat; anth. nodding: ova. 1-celled; 

 sty. 0; caps. 1-celled, many-seeded. — "^l- 



S. PUSILI.A. Ph. 



St. simple, 1-flowered ; Ics. oblong; cal. segments oliinse, half as long as 

 the large corolla; cor. rotate, segments oblong-acuminate. — White Hills, N. H,, 

 Pvrsh. Stem an inch or two high, with one or two pairs of small leaves and a 



