188 SYNGENESIA P. SUPERFLUA. 



256. PYRETHRUM. 



1. P. Parthenium, stem erect, 2 feet high; leaves stalked, 

 compound, flat ; leaflets ovate, cut, the uppermost confluent ; 

 flower-stalks corymbose ; rays white, shorter than the diameter 

 of the yellow disk. Common Fever-few. 



Hob. Waste ground, and about hedges. " About New- 

 water - haugh," Thomp. Old walls near Eyemouth, 

 Rev. A. Baird. Near Twizel Toll. July. $ 



2. P. inodorum, stem branched, spreading ; leaves sessile, pin- 

 nate, in numerous capillary pointed segments ; flowers large, so- 

 litary, white ; crown of the seeds entire. Horse-gowan. 



Hob. Fields and road-sides very common. Aug Oct. Q 



3. P. maritimum, stems diffuse ; leaves sessile, doubly pinnate, 

 fleshy, pointless, convex above, keeled beneath; flowers large, 

 white ; crown of the seeds lobed. Sea Feverfew. 



Hob. Sea-banks about the Needle-eye, Thomp., but in 

 almost inaccessible places. July, Aug. Ij. 



257- ANTHEMIS. 



1. A. aroensis, stem much branched, hairy ; leaves doubly pin- 

 natifid, hairy, segments parallel ; flowers white ; receptacle coni- 

 cal, scales lanceolate, acute, keeled, prominent ; seeds crowned 

 with a quadrangular border. Corn Chamomile. 



Hob. Road-sides in various places, but nowhere plentiful. 

 " By the old tower near the Magdalen-field Farm- 

 house," Thomp. Near Che swick Buildings; and near 

 the Inn on Doddington Moor. July. $ 



The A. Cotula is mentioned as a common weed by Messrs 

 BAILLEY and CULLEY in their Agricultural Survey 

 of Northumberland ; and, from the Botanist's Guide, it 

 would appear to be far from rare either in that county or in 

 Durham, but we have not seen it within the limits we 

 have assigned to ou selves. 



