The vegetable SYSTEM. 
40 
The Plant grows to two Foot high ; the Leaves are covered with a 
downy matter ; the Flowers are of a very delicate blue. 
3. GRASSY BLUE-BOTTLE. 
Plate 26. Fig. 3. 
Corn Blue-Bottlr. 
Charaftcr of the Species. Centaurea Cyanus* 
The Leaves are graffy, and have high Ribs. 
Fig. 3. a. 
This is an Annual, native of our Corn-fields, and flowers in 
Auguft. The Stalk is tough, rib’d, and two Foot and a half high ; 
the Leaves are of a dead faint green : The Flowers are blue. In the 
South of France the Flowers are lai'ger than in our fields ; and have 
ufually the outer range of Florets of a different colour from thofe 
within : In our Gardens, it grows to the fame flate and with great 
variety. 
There is fcarce any vegetable fubflance in which the Colour is 
fo fixed and permanent as in our Corn Blue-Bottle. It may probably 
afford a good dye. 
GENUS 11. 
SCURF - WORT. 
PSORA. 
Charadfer of the Genus. 
The Scales of the Cup grow membranaceous at the top, 
and their Hairs are confiderably long and hard. 
Plate 27. 0 ah, 
I. BRANCHY SCURF-WORT. 
Plate 27. Fig. I. 
Chara£ler of the Species. Centaurea Orientalis. 
The Leaves are doubly pinnatifid. 
Fig. I. a. 
This is a Perennial, native of the Greek Hands, and found alfo 
in 
