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Cladonia arbuscula (Wallr.) Flot.
subsp. arbuscula


Closely similar to subsp. squarrosa (q.v.), but perhaps with more and usually somewhat shorter branches, Pd (para-phenylenediamine) test slowly pale to bright yellow, UV-. Mixed with other members of subgenus Cladina, including subsp. squarrosa, on base-poor dunes in NE Scotland. Apparently uncertain elsewhere (perhaps in East Anglia) but undoubtedly rare; many apparent records available through the NBN Gateway are likely to be a result of the "nominate subspecies problem" or use of the name to differentiate from C. mitis when the latter has been considered another subspecies of C. squarrosa.

Refs: Smith et al. (2009), 317; Ahti (1961), 101-108 (? as subsp. arbuscula, "chemical strain II"), plate 37 (photo); Wirth (1995), 1: 296.

A taxon of uncertain circumscription, see notes under subsp. squarrosa

Cladonia arbuscula subsp. arbuscula
Cladonia arbuscula subsp. arbuscula
Cladonia arbuscula subsp. arbuscula, close view
In dune heath, Findhorn, Morayshire, April 2009
 
Cladonia arbuscula subsp. arbuscula
Cladonia arbuscula subsp. arbuscula
Cladonia arbuscula subsp. arbuscula
In dune heath, Findhorn, Morayshire, April 2009, a separate population from above, with somewhat shorter branches
 


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Uploaded August 2010, last modified January 2016