(120) 



when more deeply parted and pinnatifid, the 

 lobes not linear; flowers yellow. 1. Com- 

 mon. Summer. 



5. T. HETEROPHYLLUM Greene. Beak of the 

 akene but little longer than body; flowers yel- 

 low. 0. Common. Spring. 



72, Taraxacum Haller. DANDELION. 



Involucre imbricate. Akenes contracted 

 into a long beak; pappus oo-seriate; bristles 

 white, capillary nearly persistent. 2. Flow- 

 ers yellow. 



1. T. OFFICINALE Weber. Ballast weed in- 

 troduced from Europe; rare. Summer. Offici- 

 nal under the old Linnean name. Leontodon 

 Taraxacum. 



73, Sonchus L. SOW-THISTLE. 



Involucre oo-seriate, imbricate. Akenes 

 compressed, truncate. Pappus oo-seriate, ca- 

 pillary. Hairs in fascicles, soft. Flowers yel- 

 low. 



1. S. OLEEACEUS L. Auricles of the cau- 

 line leaves acute. 0. Common. All the 

 year round. Ballast weed from Europe. 



2. S. ASPER Till. Auricles of the clasping 

 cauline leaves rounded. 0. Ballast weed 

 from Europe. 



