ADDENDA 



Part i. p. 88, after C. phaeocephalum. 



Calicium roscidum Floerke Deutsche Lich. 3, p. 1 (1815) ; Nyl. 

 Syn. Lich. p. 153 (1858-60). — Thallus ashy-grey, thin or almost 

 obsolete. Apothecia moderate in size, blackish ; stalk black, 

 rather short and stout ; capitulum lentiform, the margin or the 

 entire head greenish-yellow-pruinose ; spores brown or blackish, 

 fusiform-ellipsoid, 1-septate, slightly constricted at the septum, 

 brownish or blackish, 0,009-018 mm. long, 0,004-8 mm. thick. 

 — Calicium hyperellum var. roscidum Ach. Syn. p. 59 (1814). 



Approaches C. phceocephalum in the size and appearance of the 

 apothecia, but easily distinguished by the form of the spores. 



Hab. On oak bark. — B. M. Lowther Park, Westmoreland (com- 

 municated by J. A. Martindale). 



Part i. p. 128, after C. alcicornis. 



Cladonia luteoalba Wils. & Wheld. Trans. Liverp. Bot. Soc. 

 i. p. 7. (1909). — Thallus macrophylline, lobes 5-10 mm. long, 

 irregularly crenate, yellowish-green above (becoming blackish- 

 green with age), pallido-sulphureous beneath, their apices and 

 sometimes their lateral margins strongly incurved when dry 

 (as in C. alcicornis) showing the pulverulent under surface and 

 rendering the leaflets concave. Podetia rare, only once seen, 

 short (3-5 mm.), cylindrical, from the surface of the leaflets, 

 scyphiferous, scyphi hardly dilated, bearing small marginal 

 discrete scarlet apothecia. The chemical reactions of the upper 

 face are indistinct (Kf, C — ). The yellow colour of the under 

 face becomes much deeper on applying caustic potash and the 

 immediate application of CaCl2 still further intensifies it until it 

 is of a deep orange-yellow. — See also Journ. Bot. xlvii. p. 324 

 (1909). 



Hal. On old mosses in high altitudes. — B. M. Graygarth Fell, 

 Lancashire. 



Part i. p. 177, after C. sylvatica. 



Cladina impexa Harm. Lich. France, p. 232 (1907). — Dis- 

 tinguished by the author from C sylvatica by the more 

 swollen main stalks or podetia, the whitish-coloured and some- 

 times almost translucent appearance of stalks and branches and 



