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i8 CONIOCARPINEE » [cALIcruM 
7-11 p long, 3-6p thick.—Hook. in Sm. Engl. Fl. v. p. 141. 
C. minutellum Ach. in Vet. Acad. Sage: 1816, p. 118, t. 5, £2, 
C. parietinum Ach. op. cit. p. 260, t. 8, £. 1, a, B; ‘Gromsbi in 
Grevillea xv. p. 14 (1886) & Monogr. i. p; 96; incl. £. minuéellum. 
Var. minutellum Nyl. Syn. i. p. 159, 1860. C. subtile Pers. 
Tent. Disp. Meth. Fung. p- 60 (1797)? Mudd Man. a 258 ; 
Cromb. Lich. Brit. p. 13; Leight. Lich. Fl. p. 44; ed. 3, p. 44. 
Strongylium debile S. F. Gray N Vat. Arr. i, p. 485 (1821). 
Exsicc. Leight. n. 314; Mudd n. 247. 
The species has a very doubtful or no recognizable gonidia- 
containing thallus, and has been usually classified among fungi by 
recent Continental botanists. It is retained here on account of its 
affinity to lichen species. The spores agree in form with those of 
Calicium rather than with those of Chenotheca and are occasionally 
septate. Form minutellum has smaller apothecia which are some- 
times greyish-pruinose beneath. 
Hab. On the trunks of decoxticated dead trees and on old palings 
and timber.—Distr. Local and rare in §., Central and N. England,— 
B. M. Henfield, Sussex; Lyndhurst, New Forest, Hants; Wheatfield 
Park, near Tetsworth, Oxfordshire (f. minuwtellwm) ; Baysdale, Cleve- 
land, Yorkshire. 
9. C. populneum De Brond. ex Duby Bot. Gall. ii. p. 638 
(1830).—Thallus developed under the bark (hypophleodal) in 
pale or whitish spots. Apothecia minute, scattered, entirely 
black, somewhat shining, the stalk very short and slender ; 
capitulum top-shaped ; spores blackish, 1-septate, 10-11 p long, 
5-6 p thick.—Mudd Man. p. 257, t. 4, f. 104; Leight. Lich. 
FL. p. 45; ed. 3, p. 44. C. curtum var. populinum Turn. & Borr. 
Lich. Brit. p. 149 (1839); Hook. in Sm. Engl. Fl. v. p. 140. 
C. triste Koerb. Syst. Lich. Germ. p. 308 (1855)? ; Cromb. Lich. 
Brit. p. 13 (1870). 
Distinguished from the preceding by the smooth shining thallus 
and by the larger spores. 
Hab. On the smooth bark of poplars in w ooded upland tracts.— 
Distr. Rare in the 8.W. Highlands of Scotland and in S.W. Ireland. 
—B. M. Airds, Appin, Argyll; Killarney, Kerry. 
10. C. diploellum Nyl. in Flora li. p. 161 (1868).—Thallus 
(if proper) effuse, very thin, greyish-white. Apothecia minute, 
scattered, entirely black, the stalk very short; capitulum top- 
shaped open, the sporal mass scarcely prominent ; spores simple 
or at length 1-septate, 6-9 » long, 3-4 » thick.—Carroll in Journ. 
Bot. vi. p. 109 (1868); Cromb. Lich. Brit. p. 13; Leight. Lich. 
Fi. p. 39; ed. 3, p. 39. 
The smallest of all the species, and considered by Nylander as 
closely allied to C. disseminatum, a Continental species. The speci- 
mens in the herbarium of the British Museum are very imperfect. 
Hab, On the bark of holly in wooded districts. —B, M, Cromaglown, 
Killarney, Kerry (the only locality). 
