The vegetable SYSTEM. 
43 
flowering in September. The Leaves are of a dulTcy green ; tlie Stalk 
is two Foot and a half high, and has fcarce any Branches. The 
Flowers are of a dull yellow. 
GENUS IV. 
K N A P W E E‘D. 
J A C E A. 
CharacSter of the Genus. 
The Scales of the Cup are oblong, and have long weak 
Hairs towards their top. 
Plate 29. a a 
I. LANCED KNAPWEED. 
Plate 29. Fig. i. 
Common Knapweed. 
Character of the Species. Centaurea Nigra. 
The Leaves are feflile, lanced, and irregularly dented. 
Fig. i.a 
This is a Perennial, common in our dry paftures, and flowers in 
July. The Leaves are of a flrong green; they are very uncertainly 
divided at the edge, fome deeply and fome not at all on the fame 
Plant. The Stalk is two Foot and a half high, of a duflcy colour and 
firm fubftance. The Flowers are crimfon, and the tips of the Scales 
of their Cups are of a deep dufky purple. 
2. LEAFY-HEADED KNAPWEED. 
Plate 29. Fig. 2. 
Character of the Species. Centaurea Pullata. 
The Cup is furrounded with a leafy Circlet at its Bafe. 
Fig. 2. a . — 
This is an Annual, native of Spain and of the South of France, 
a very diminutive Plant, flowering in Augufl:.' The Leaves are of a 
dufky and unpleafant green. The Stalk feldom rifes to more than two 
or 
