58 MIDDLESEX FLORA. 



HYPOCILERIS, L. 



"Involucre imbricate; achenium attenuate into a long beak, or 

 slightly attenuate and almost without beak; pappus plumose; 

 receptacle chaffy, chaff deciduous. Flowers yellow or golden." 

 Koch, Syn. Fl. Germ. 

 H. glabra, L. 



N. Chelmsford, wool-waste (Rev. W. P. Alcott; specimen in herb, 

 of). Adv. from Gal., but a native of Eu. 



" Stem branching, smooth, leafless ; ray florets as long as the 

 involucre; central achenia long-beaked, the marginal without 

 beak." Koch, Syn. Fl. Germ. 



MICROSERIS, Don. 



M. Douglasii, Gray. 



N". Chelmsford, wool-waste (Rev. W. P. Alcott ; specimen in herb, 

 of). 



" A very rare species, having been collected only by Douglas him- 

 self, over forty years ago," Watson in lit. 1879. Adv. from the 

 Pacific coast. 

 For description, see Gray, Syn. Fl. N. A. 



LEONTODON, L., Juss. 



L. AUTUMNALIS, L. FALL DANDELION. 



Very common. Aug.-Oct. Nat. from Eu. 

 HIERACIUM, Tourn. 



H. Canadense, Michx. CANADA HAWKWEED. 



Rather common. Aug.-Sept. 

 H. scabrum, Michx. ROUGH HAWKWEED. 



Common. Aug. 

 H.venosum,L. RATTLESNAKE- WEED. 



Common. July-Aug. 

 H. paniculatum, L. PANICLED HAWKWEED. 



Rather common. Ang.-Sept. 

 If. aurantiacum, L. 



Reading, et al. ; occasionally spontaneous. June. Adv. from Eu. 



For description, see Gray, Syn. Fl. N. A. 



CREPIS, L. 



" Annuals or perennials, with soft, white pappus and narrow- 

 necked or beaked akenes (some truncate or merely tapering 

 upwards) ; leaves entire or inclined to be pinnatifld ; flowers all 

 yellow." Coulter, R. M. Bot. 



