458 C. GENTIANACE. GENTIANA. 
site er brachiate branches. Leaves 4—7’’ by 1—3”, closely sessile. Flowers 
lateral and terminal and central, the pedicels in the forks near }’ long, the 
others shorter. Corolla bright purple, tube yellowish-green, slender, persistent 
and withering on the capsule. July—Sept. 
2. E. Pickertncu. Oakes. Pickering’s Erythraa. 
St. dichotomously branched, erect; dvs. clasping and slightly decurrent, 
lower ones oval, obtuse, upper lanceolate, acute; /ls. sessile, mostly lateral on 
the long branches; sep. linear, acute, erect; eor. tube slender, contracted at the 
neck, lobes spreading, obtuse; anth. linear-oblong, finally twisting outwards.— 
@ Coast of Maryland. Dr. Pickering. Sandy margins of the sea-shore, Nan- 
tucket, Mr. Oakes. Whole plant very smooth and intensely bitter, 6—12’ high. 
Leaves 1’ long, fleshy, pale green. Corolla 8’ long, rose or nearly white. 
3. CICENDIA. Adans. 
Calyx 4—5-parted; cor. infundibuliform, marescent, tube cylin- 
dric, limb 4—5-parted; sta. 45, inserted into the throat of the 
corolla; anth. erect, roundish, scarcely exserted; sty. deciduous ; 
stig. capitate; caps. 1 or partly 2-celled, 2-valved.—@® Low herbs, with 
yellow or rose-colored flowers. 
C.? puncHEeLia. Griseb. (Exacum. Pi.) 
Lower lvs. suborbicular, wpper subulate; panicle corymbose; ped. filiform ; 
cal. 4-parted, segments subulate—Sea coast, N. J. This plant appears not to 
have been detected by any botanist since Pursh, and from his brief description 
it is impossible to ascertain its true position in the order. 
4. OBOLARIA. 
Gr. ofo os, a small coin, with which the leaves of these plants are compared. 
Calyx of 2 cuneate-oblong sepals or bracts; corolla tubular-cam- 
panulate, marescent, 4-cleft, lobes entire or crenulate ; stam. inserted 
on the corolla at the clefts; stigma subcapitate, bifid; capsule 1- 
celled, 2-valved ; seeds 00, very minute—% Leaves opposite. F'ls. 
axillary aud terminal, sessile, with leaf-like sepals. 
O. Vircinica. Penny-wort. 
Penn. to Car., W. to Ky., in woods. Stem 4—8’ high, often in clusters, 
subsimple or with a few opposite branches above. Leaves cuneate-obovate or 
roundish-rhomboidal, sessile and decurrent at base, fleshy, obtuse or truncate 
at apex, lower ones small and remote, upper crowded, glaucous-purple, sepals 
or bracts similar. Corolla pale purple or whitish, longer than the stamens. 
Capsule ovoid, obtuse, surrounded by the withered corolla. Apr., May.—There 
is some doubt in respect to the order of this genus. It has more recently been 
referred to Orobanchacez. 
5. GENTIANA. Tourn. 
From Gentius, king of Illyria, who discovered the tonic virtues of this genus. 
Calyx 5—4-parted or cleft ; cor. marescent, tubular at base, limb 
4—-5-parted, segments either spreading, erect or convergent, often 
furnished with intermediate, plicate folds; sta. 5—4, inserted in the 
corolla tube; stig. 2, revolute or erect; sty. short or 0; caps. 2- 
valved, 1-celled, many-seeded— Herbs of various habit. Lvs, oppo- 
site. ls. terminal or cymose. 
§ 1. Flowers 5—10-merous. 
1. G. PNeuMONANTHE. (G. saponaria. Griseb.) 
St. ascending ; lvs. linear-lanceolate, or the lower oblanceolate, the mar- 
gin smooth! cyme terminal; fis. aggregated, or in a racemose cyme, sessile ; 
cal, 5-cleft, the lobes linear, equaling the tube; cor. clavate, connivent at apex, 
twiee longer than the ealyx, lobes ovate-obtuse, much longer than the interme- 
