75 
CENTAU’REA. 
ale surrounding the flower-heads ending in a 
long, straight spine, enlarged and toothed at its | 
base. : 
Heads purplish; spines not cottony at the base. ; 
j Calcitra’pa. Star-thist a ae 
LL BR 
Heads yellow; spines cottony at the base. uae 
solstitialis. 
Bracts short, ending in a dark-coloured fringe of fine, 
short teeth. 
Outer florets of the flower-heads bright-blue, much. 
( enlarged and one-sided. 
L Cy'anus. Cornflower, deborile 2 
Florets purple (the outer enlarged or not). 
Fringed portion of the bracts sharply divided off. 
from the rest ; upper leaves nearly entire. 
nigra. Anapweed. S 
Fringe running down the edge of the bracts; most Ee & 
of the leaves deeply divided. | Pf; 
Scabio'sa. Hardhead? * 
CEPHALAN’THERA. 
Flowers rose-purple, the ‘lip,’ or lower petal, narrow- 
pointed. 
rubra. Red Helleborine? 
Flowers white, the lip wide and bluntish. 
Bracts under the flowers all longer than the grooved, 
f stalk-like ovary; leaves wide. | 
pallens. White Helleborine.- 
~Bracts (at least all the upper ones) much shorter than 
the ovary ; leaves usually narrow. 
ensifo'lia. 
CERAS'TIUM. 
Petals not longer than the calyx (or very slightly) ; 
flowers rarely over } inch across. 
vulga‘tum. Mouse-ear Chickweed.- 
Petals twice as long as the calyx. 
a narrow and pointed, mostly 5 or 6 times as. Ga 
| long as they are wide. 
arven’se J 
Leaves oval or oblong, bluntish, the larger ones about. € ii : 
twice as long as they are wide. Uy 
alpinum. 
pe a 
