MACKENZIE: NOTES ON CAREX—XIII 353 
4512, 4750 (K.M.); Monteer, Bush 2872, 2777, 4739 (K.M.); 
Webb City, Bush 1642 (K.M.); Jefferson Barracks Glatfelter 
(K.M.); St. Louis, Glatfelter (K.M.); Eagle Rock, Barry County, 
Mackenzie (K.M.); London, Ozark Mountains, Lansing 2932 
(H.); Klondike, Bush 2207 (H.); Blue Springs, Bush 6981 (H.). 
ARKANSAS: Miller County, Bush 2394 (K.M.). 
OKLAHOMA: Waynoka, Woods County, Stevens 571% (H.). 
Texas: Handley, Tarrant County, Ruth 710 (K.M.); Dallas, 
Reverchon 2390 (K.M., H.); Waco, Tyler (H.). 
6. CONCERNING CAREX XANTHOCARPA BICKNELL 
In one of those keenly analytical papers which have served 
so well to clear up problems connected with difficult groups of 
plants Bicknell in 1896 proposed a new species, Carex xanthocarpa, 
with a variety annectens. The fact that the very appropriate 
specific name selected was in use in Europe for a plant probably 
of hybrid origin was later brought to his attention, but he 
contented himself with raising his variety annectens to specific 
rank in 1908 without further reference to his Carex xanthocarpa. 
Fernald, meantime, in 1906, having noticed that the poorly 
appreciated Carex vulpinoidea var. ambigua Barratt had the 
same short beaked perigynia as Bicknell’s plant, had taken up 
this varietal name under Carex setacea Dewey. Under this 
name it appears in the seventh edition of Gray’s Manual, Carex 
xanthocarpa being given as a synonym and no reference being 
made to the variety annectens. In 1909 Kiikenthal, in the 
Pflanzenreich, took up Bicknell’s Carex xanthocarpa as a variety 
under Carex vulpinoidea and treated var. annectens as a forma. 
Finally, in 1913, I treated both Carex xanthocarpa and Carex 
annectens under the name Carex annectens, and this treatment 
has been quite generally followed. The above completes the 
nomenclatural history of these plants until very recently, with 
the exception that a European botanist, E. G. Camus, noting 
that Carex xanthocarpa Bicknell had been previously used, 
gave to Bicknell’s plant the name Carex Bicknellit, overlooking 
however the fact that the name Carex Bicknellit was in use for 
another American species. 
