CLADONIA.] CLADONIEI. 159 



Form tumida Cromb. Grevillea, xi. (1883) p. 114. Podetia 



turgid, ventricose, the axils and apices dilated, infundibuliform. 



This is analogous to form ventricosa of C. squamosa, with which but 

 for the reaction it might readily be confounded. It is apparently but 

 rarely fertile. 



Hab. On moist shady rocks among mosses in upland tracts. Distr. 

 Local and scarce in S. England, N. Wales, S. Scotland, and in the S.W. 

 Highlands. B. M. : High Rocks, near Tunbridge Wells, Kent ; Dolgelly, 

 Merionethshire. New Galloway, Kirkcudbrightshire ; Barcaldine, Argyll- 

 shire. 



28. C. asperella Cromb. Grevillea, xi. (1883) p. 114. Thallus 

 squamulose at the base, the squamules minute, inciso-crenate, sub- 

 evanescent ; podetia elongate, slender, erect, whitish or greyish- 

 white, glabrous, squamulose or furfuracoo-pulverulent, prolif'erously 

 and variously branched, the axils and apices pervious, denticulate 

 (K , CaCl ). Apothecia small, conglomerate, brown. Cladonia 

 s<)uamosa ft. asperella Florke, Clad. (1828) p. 132; Mudd, Brit. 

 Clad. p. 20. To this fide Nyl. is referable also Cenomyce speciosa 

 Del. in Dub. Bot. Gall. ii. p. 626. Brit. Exs. : Mudd, Clad. n. 41. 



From subspecies C. adspersa, which it closely resembles, this differs in 

 the erect podetia and their fasciculate branches, which are subulate or 

 truncate at the apices. It may thus with propriety be regarded as 

 distinct species rather than as a subspecies of C. squamosa. In the very 

 few British specimens the podetia, which are 2-3^- in. long, are sparingly 

 foliiferous throughout, with the apothecia rarely present. 



Hab. Among mosses on rocks and heaths in upland districts. Disfr. 

 Apparently very local and scarce in N. England. B. M. : Stogdale, Cleve- 

 land, Yorkshire. 



Form polychonia Cromb. Grevillea, xi. (1883) p. 114. Podetia 

 glabrous and furfur aceo-pulverulent, the axils dilated and radiato- 

 proliferous. Cladonia squamosa f. polychonia Florke, Clad. (1828) 

 p. 136 ; Mudd, Brit. Clad. p. 20. Brit. Exs. : Mudd, Clad. n. 42. 



Differs in the absence of any folioles on the podetia (except occasionally 

 towards their base) and in the form of the axils. The apothecia are very 

 rare. 



Hab. On the ground in upland heaths. Distr. Rare and local in N. 

 England ; probably to be detected elsewhere. B. M. : Baysdale, Cleve- 

 land, Yorkshire. 



29. C. csespititia Florke, Clad. (1828) p. 8. Thallus squamulose- 

 foliaceous at the base : leaflets small, ascending, lacimato-lobed, 

 crenate or eroso-lacerate at the margin, densely caespitoso-congested, 

 pale-green above, white beneath ; podetia very short, naked, cylin- 

 drical, simple or divided, pale (K , CaCl ). Apothecia conglo- 

 merate either on the podetia or on the leaflets, flesh-coloured or 

 reddish; spores 0,009-16 mm. long, 0,004-5 mm. thick. Cromb. 

 Grevillea, xi. p. 114. Cladonia squamosa subsp. cwspititia Cromb. 

 Lich. Brit. p. 20. Cladonia sqnawosa e. cct'spiiitia Mudd, Man. p. 57, 



