72 ENGLISH BOTANY. 
Glabrous biennials, with the leaves often connate. Flowers in 
terminal dichotomous cymes, bright-yellow, opening in sunshine. 
The name of this genus of plants comes from the Greek word xXunoc (chloros), 
greenish-yellow, probably owing to the colour of the blossoms. 
SPECIES I.-CHLOR A PERFOLIATA. Linn. 
Plate DCCCCXIIT. 
Reich. Ic. PL Germ, et Helv. Vol. XVII. Tab. MIX. Fig. 1. 
J liUot, FL Gall, et Germ. Exsicc. No. 2313. 
Radical leaves obovate-elliptical, attenuated into an indistinct 
petiole ; stem-leaves connate, deltoid-ovate, united by their whole 
base. Flowers numerous, in a corymbose cyme. Calyx 8-partite ; 
segments strapshaped-subulate. Segments of the corolla oblong- 
obovate, sub-obtuse, often denticulate at the apex, nearly twice as 
long as the tube, one-fourth or one-third longer than the calyx- 
segments. 
On chalky banks, not uncommon ; more rarely on clay. Pretty 
generally distributed throughout England, as far North as the 
counties of York and Lancaster, but most abundant in chalk and 
limestone districts. 
England, Ireland. Biennial. Late Summer. 
Stem 9 inches to 2 feet high, simple up to the inflorescence, 
with a rosette of leaves at the base. Leaves rather distant, each 
pair so completely united as to seem like a single leaf with the 
stem passing through it, \\ to 3 inches from point to point, entire, 
acute or acuminated. Elowers stalked, in a regular dichotomous 
corymbose cyme. Calyx-segments \ to f inch long. Corolla about 
J inch across when expanded, bright-yellow, with the segments 
slightly recurved at the tips, the tube ruptured by the capsule as it 
increases in size. Style 2-cleft at the apex ; each stigma 2-partite. 
Capsule shorter than the calyx-segments. Plant glabrous and very 
glaucous. 
Yellow Centaury. 
French, Chlore Perfoliee. German, Durchwachsener Bitterling. 
GENUS IV— Or E N T I A N A. Tournef. 
Calyx 4- to 5-cleft or -partite, more rarely spathaceous and 
dimidiate, or 8- or 10-partite. Corolla funnclshaped-salvershaped 
or rotate, or campanulate, persistent and withering ; tube long or 
short ; limb 5- or 4-partite, frequently with appendices in the 
