XEW RARE OR CRITICAL LICHENS 313 



to this plant and not to C. squamosa £. asperella Flk. which is 

 scyphiferous. 



C. sympliycarpia (Ach.) Arn. Mr. Hebden considers that some 

 plants referred to C. caespititia really belong to this species. Ealeio-h's 

 Cross (o), Bramble hill (11). 



C. delicata (Ehrh.) Flk. On old stmnp, Orchard Portman (5). 



C. cocci/era (L.) Schaer. Form corrmcopioides (Ach.) Fr. til. 

 (f. phyllocoma Flk.). Blackdowns, Exmoor and Quantocks (o), Mas- 

 bury and Mendip (6), Llanberis (49), Greenfield and Keighley (63), 

 KiUin 88. Form. nov. epiphylla has the apothecia sessile or almost 

 so on the thalline squamules. Greenfield (63). Yar. pleurota (Flk.) 

 Schaer. ^Quantocks (5). 



C. hellidiflora (Ach.) Schaer. Llanberis and Snowdon (49), 

 Ben Laoigh 3600 ft. (88), Ben Doran (98). 



G. digitata (L.) Hoffm. On decaying wood or on the gromid. 

 Combe Sydenham (5), Cannock Chase (39), Keighley (63). Many 

 of the described iovms such. -ds 2)f'olife?'a, phyllophora, deiiticulata and 

 cephalotes have been fomid. 



C. macileiita Hoffm. Var. scahrosa (Mudd.) Nyl. Quantocks 

 and Treborough (5), Frome (6), Keighley (63), Kircubbin (Ireland 

 38). Var. styracella (Ach.) Wain. Blackdown and Brendon hills 

 (5) ; form clavata (Ach.) Fr. Blagdon hill (5). Var. ostreata Nyl. 

 Keighley (63). 



C.flahelliformis (Flk.) Wain. What is usually known in this 

 country as C. macileiita v. coronata may be taken as the type of this 

 •segregate. The chief differences between it and C. macilenta are 

 that C.flahelliformis has larger thalline squamules, the podetia are 

 granulose, scyphiferous and more or less radiate, whilst C. macilenta 

 has farinose and ascyphiferous podetia. Yovm. poly dactyla (Flk.) 

 W^ain. is not uncommon in Somerset. Excellent examples occm* on a 

 somewhat shaded bank on Staple hill (5). Form pliyllopliora 

 (Mudd.). On bank, Holford Combe (5). Form ventricosa (Huds.) 

 Cromb. Haddeo valley (5). Form liixiirians Harm. A plant 

 agreeing with this occurs on a heath on the Quantocks (5). The 

 reaction with potash is indefinite and the form is variously referred to 

 C. macilenta (^Uahelliformis) , C. bacillaris and C. liypocrita Wain. 



C. hacillaris (Ach.) N^d. Staple hill (5), Crompton moor (59), 

 Greenfield and Keighley (63). Var. suhcoronata Nyl. Staple 

 hiU (5). 



C. FloerJceana (Schaer.) Fr. A spadiceous form occurs on Sel- 

 worthy hill. Yar. intermedia Hepp. Blagdon hill, Brendon hill and 

 Triscombe (5). Yar. carcata Wain. Blackdown and Brendon hills 

 (5) ; the form trachypoda N^d. is common on peat}" moorlands. 



Cladina sylvatica (Hoffm.) Nyl. Form lacerata (Del.) N^d. is 

 practically the same thing as i.flssa (Schaer.). Exmoor and Black- 

 downs (5), Black Down (6). Form grandis (Flk.). Exmoor, 

 Blackdowns and Quantocks (5), Black Down (6), Nant-y-Ffrith 

 (51), Killin (88). Form tenuis Lamy. Cleeve hill and Shipham 

 (6), Keighley (63). This form, together with C. rangiferina 

 f. tenuis Flk., has been elevated to specific rank as C. tenuis by 

 Harmand. 



Journal of Botany. — Vol. 55. [Xotember, 1917.] z 



