176 MIDDLESEX FLORA. 



Page 111. After the note on C. strigosus, L., insert 

 C. strigosus, L., var. capitatus, Boeckl. 



Melrose (F. S. Collins). 



" Inflorescence of several capitate clusters, rays short." Britton, 

 Bull. Torr. Bot. Club, XIII., 212. 



A doubtful form which may belong under this variety, or is per- 

 haps a hybrid between C. strigosus and C. filiculmis, was found 

 at Chelmsford, Sept. 20, 1885, by Dr. C. W. Swan, who gives the 

 following description : 



" 9 inches high; habit of filiculmis, the slender culms with hard 

 tuberous bases, leaves short and very narrow, umbel with very 

 short rays forming one almost sessile dense head, and involucre 

 that of this species ; but the scales longer and narrower, strongly 

 conduplicate, yellowish brown, much exceeding the achenium, 

 which (immature) appears to be of an intermediate character, 

 and is partly enclosed by the membranous wings of the rachis. 

 Spikes 8-10 flowered." 



