18; 
Superfluous Polygamy. Polyg. Super. 
Leaves doubly winged, naked, segments strap- 
shaped, toothed, stem leaves furrowed up- 
wards. — Curtis. VI. 6i. Woodville. 64. 
Martyn. 123. excellent. 
Pastures, July, P. Common. 
614. Sneezewort, — A. Ptarmica. 
Leaves spear-shaped, pointed, finely serra- 
ted. — Curtis. V. 60, 
Banks of Rivers, July, P. Common. 
* * * 
Frustraneous Polygamy. Polyg. Frustra. 
^he hermaphrodite florets of the center are fur- 
nished zvith a stigma^ and so hear seed : hut 
the florets, zvhich form the circumference, 
have no stigma and are unahle to hear seed. 
Centaury. Centaurea. Gen. PI. 1331. 
Receptacle bristly. Feather simple. Blos- 
soms of the ray funnel-shaped, longer and 
irregular. 
615. Blue Bottle. — C. Cyaniis. 
Cups serrated, leaves strap-shaped, very en- 
tire, lower ones toothed — Curtis. VI. 62. 
Sowerby. 277. 
Cornfields, July, A.* Common. 
616. Least Knapweed. — C. nigra. 
Bb 2 
Cup 
