composite: 



339 



A. Lappa, Linn. Common burdock. Fig. 280. Common weed from 

 Europe, with a deep, hard root and bushy top 2-3 ft. high: leaves broad- 

 ovate, somewhat woolly beneath, entire or angled. 



11. CENTAUREA. Stab-thistle. Centaurea. 



Alternate-leaved herbs, the following annuals, with single 

 heads terminating the long branches: heads many-flowered, 

 the florets all tubular but the outer ones usually much larger 

 and sterile: scales of involucre over-lapping: torn- i/ri-tly: 

 akenes oblong, with bristly or chaffy pappus. Cultivated. 



409. Centaurea Cyanug. At the left Is an outer or ray floret; the 

 details of a di-k floret : then follows the fruit. 



.Mow 1 1 1 r. 



C. Cyanu3, l.in:i. Corn-flower. Bachelor's button. Pigs. 231, 499. Qraj 

 herb: leaves linear and mostly entire : heads blue, ro r white. Eui 



C. mo3chata, Linn. Sweet sultan. One 2 ft., si th: leaves pinnatifld: 



pappua Bometimes wanting: heads fragrant, white, rose or yellow, I 



Asia. 



15. S0LIDAG0. GOLDENROD. 



Perennial herbs, with narrow, sessile |< load- yellow, i 

 whitish, few-flowered, usually numerous In the cluster, th< I Id 



and pistillate: scales of involucre close, UBuallj not like: 



torn- not chaff] : akene nearly cylindrical, ribbed, itli pap] 

 Bofl bristles. Of goldenrods then are man} spi 

 plant- of the American autumn. Th< critical for tin' i 



ic. Aster. \-i i r, pig. 227. 



Perennial herbs, with narrow or broad loavei 

 man] white, blue or purple rays In a single 

 scales of involucre overlapping, usuallj more or l< 

 Mat : ak< di - flat tent d . bi 1 

 plants in the autumn Mora of this country, Tin 

 is difficult to draw specific lines. The bi glnni r ill find tl 



