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70, Hieracium ourn. HAWKWEED. 



Involucre co-seriate, imbricate. Akenes 

 terete, with a thin, crenulated ring on the 

 apex, pappus 1-seriate, capillary. 1C. 



1. H. ALBIFLORUM Hook. Involucre co- 

 flowered; akenes linear; pappus sordid; flowers 

 white. Saucelito. Summer. 



71, Troximon Nutt. 



Involucre imbricate. Akenes linear. Apex 

 contracted. Pappus oo-seriate. Bristles silky, 

 not deciduous in a ring. 



1. T. APARGIOIDES Less. Beak of the akene 

 about the length of body; flowers yellow. 2. 

 San Francisco. Summer. 



2. T. HUMILE Gray. Beak of the akene sev- 

 eral times the length of body; pappus as long 

 as the beak; flowers yellow. It- Common. 

 Summer. 



3. T. LACINIATUM Gray. Beak of the akene 

 several times the length of the body; pappus 

 much shorter than the beak; leaves laciniate 

 when more deeply parted and pimiatifid, the 

 lobes linear; flowers yellow. 1C. Marin 

 County. Summer. 



4. T. GRANDIFLORUM Gray. Beak of the 

 akene several times the length of body; pappus 

 much shorter than the beak; leaves runcinate 



