REPORT FOR 1912. 



261 



Cirsium anglicum, DC, var. polycephalum, Druce. Formoyle Hill, 

 Londonderry, July 1912. Under Cirsium britan'tiicum I have des- 

 cribed this variety in the Report 1912, p. 165. The trivial name 

 britannicum, which Williams adopts in Frodromus, though not with- 

 out challenge, for this species, dates from Scopoli Iter Qoriz. of 1769, 

 whereas Carduus pratensis dates from the Flora Ariglica of 1778 (not 

 Jacquin). There is already Cirsium pratense, DC, which is a plant 

 identical with, or allied to monspessulanum. But unaware of this I 

 used Cirsium pratense for this species in my Flora of Berks. Is 

 Fseudo-Forsteri more than a nomen nudum 1 If published, these 

 plants may well come under it as Cirsium britannimim or pratense^ 

 var. Fseudo-Forsteri. The trivial anylicum used by Lobel only dates 

 from DC 1805. — G. C Druce. "My specimen bears but one head, 

 and seems untypical only in foliage. Has Mr Druce described 

 the variety '? I do not think that De Candolle's trivial holds good ; 

 the earliest post-Linnean name is Carduus prateiisis, which Hudson, 

 in his second edition quotes as of Jacquin." — E. S. Marshall. "See 

 Wat. Bot. Ex. Club Eej)., 1901-2, p. 15, where reasons are given for 

 considering this plant — which is evidently the same as the Sussex 

 form — not to be polycephalum, but nearer Fseudo-Forsteri.^' — C E. 

 Salmon. 



Cirsium setosum, M. Bieb. Poynings, Sussex. Found growing 

 in some profusion at Poynings, Sussex, and was told it was increasing 

 rapidly. It seems quite naturalised there. Aug. 6, 1912. — A. Web- 

 ster. "I thought at first this might pass as named, as in my own 

 example the leaves seemed almost entire ; however, Mr Cryer tells me 

 that the leaves on his specimen may be called almost pinnatifid, so I 

 believe the correct name would be C. arveuse, Scop., mite, Koch. 

 In true setosum. the leaves are flat, and not decurrent, besides being 

 more entire and obtuse." — C E. Salmon. "I think this is best 

 placed under C. arvense, Scop., mite, Koch." — J. Cryer. " Dr 

 Thellung names this Cirsium arvense. Scop., var. setosum, M. Bieb., to 

 which, but not as an extreme foi'm, I have named it." — G. C Druce. 



Centaurea nigra, Jj., forma. [Ref. No. 4762.] This radiate form 

 is common in some of the marshy meadows of the Yale of Aylesbury. 

 These came from near Grendon Underwood, Bucks., June 1912. The 

 Linnean nigra is not radiate. — G. C Druce. " A small form of 

 what we consider as the type ; it varies much in foliage." — E. S. 

 Marshall. "Would come under C. riemoralis, Jord., = C. nigra, 

 var. gefiuina, Williams." — J A. Wheldon. 



Centaurea nigra, L., var. decipiens, Syme (non Thuill.). [Ref. 

 No. 40.] Marshy part of one sandy field, Grandes Rocques, Guernsey, 

 Aug. 15, 1912. Agrees best with C. pratensis, Thuill. ; is not 



