SPECIES AND VARIETIES. 271 



(167) Oporinia. 



O. autumnalis: leaves all radical, long, narrow, pinnatifid 

 with a few narrow lobes ; flower-stems erect, with 1-2 single- 

 headed branches ; flower-heads yellow ; involucres oblong, 

 tapering at the base into the enlarged summit of the peduncle, 

 with closely-appressed imbricated bracts, nearly always hairy ; 

 achenes long, striate, transversely wrinkled ; pappus brown, 

 feathery. — Meadows,pastures, and waste places. El. August. 



Yar. Tar ax act : dwarf; flower-stems often simple; flower- 

 heads rather larger ; involucre more or less covered with black 

 hairs. — Scotch Highlands. 



(168) Hieracium. Hawkweed. 



* Peduncles radical, one-Jlowered. 

 H. Pilosella : leaves oblong or lanceolate, entire, tapering 

 at the base, white beneath with short stellate down ; pedun- 

 cles radical, with a single head of lemon-coloured flowers, 

 often tinged with red on the outside ; achenes short in pro- 

 portion to the pappus. — Dry pastures, banks, and roadsides. — 

 Fl. May to July. 



** Stems several-flowered or many-flowered. 

 H. murorum : leaves spreading, rather large, ovate or ob- 

 long, stalked, sometimes obtuse and nearly entire, more fre- 

 quently pointed and coarsely-toothed, persistent at the time 

 of flowering ; flower-stems erect, 1-2 feet high, with 1-2 leaves 

 near the base ; flower-heads large, yellow, usually 3-4, some- 

 times 20-30, in a loose terminal corymb ; involucres and pe- 

 duncles more or less clothed with black glandular hairs, in- 

 termixed with a shorter rusty-coloured down, the outer scales 

 few and much shorter than the inner. — Banks, old walls, 

 meadows, pastures, and open woods. Fl. July to August. 





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