PERTUSARIA | PERTUSARIACEE 359 
Hab. On the trunks of old pines in mountainous districts.—Dvst. 
Rare in the Highlands, Scotland.—B. M. Glen Falloch and Black 
Wood, Rannoch, Perthshire. 
6. P. velata Nyl. Lich. Scand. p. 179 (1861).—Thallus 
thinnish, determinate, smooth or unequally wrinkled, or some- 
times cracked, with slight radiate folds towards the circumference, 
greyish or white (K —, CaCl+rose-red). Fertile verruce crowded, 
small, flat, sometimes sorediate at apices, the apothecia with open 
disc somewhat flesh-coloured, but “veiled” by a white layer of 
hyphe, mixed with oxalate of lime crystals, and surrounded 
by a stoutish margin; spores one in the ascus, very large, 190- 
310 p» long, 67-90 » thick (or smaller)—Mudd Man. p. 274, 
t. 5, fig. 114; Cromb. Lich. Brit. p. 59 & Monogr. i. p. 497 ; 
Leight. Lich. Fl. p. 241; ed. 3, p. 232 pro parte. Parmelia 
velata Turn. in Trans. Linn. Soc. ix. p. 143, t. 12, fig. 1 (1808). 
Lichen velatus Sm. Engl. Bot. t. 2062 (1809). Variolaria velata 
Ach. Lich. Univ. p. 319, t. 5, fig. 7 (1810); 8. F. Gray Nat. 
Arr. i. p. 490; Hook. in Sm. Engl. Fl. v. p. 170. 
The small lecanorine apothecia, the reaction with calcium hypo- 
chlorite, and the absence of definite soralia distinguish P. velata from 
other monosporous species. It is a subtropical plant, and occurs in 
Europe in the western regions. Lichen conspwrcatus Sm. Engl. Bot. 
t. 964 (1801), and other citations have been quoted by Leighton as 
synonymous with P. velata. The small sterile fragments accompany- 
ing Smith’s plate do not bear out the determination; but it is 
impossible to identify them (see also note to n. 11, P. lactea). 
Hab. On trees in wooded districts.—Dist. Rare in S. England, 
N. Wales and S. Ireland.—B. M. Ivy Bridge, Devon; Lulworth, 
Dorset ; Quarn Wood, I. of Wight; New Forest, Hants; St. Leonard’s 
Forest, Sussex ; near Rusthall Common, Kent; Castlemartyr, Cork. 
Form aspergilla Cromb. in Grevillea xix. p. 59 (1891).— 
Fertile verruce scattered, rather large, prominent and white- 
sorediate (K—, CaCl + rose-red).—Cromb. Monogr. i. p. 498. 
Lichen aspergillus Ach. Lich. Suec. Prodr. p. 28 (1798)? Vario- 
laria aspergilla Ach. Meth. Lich. p. 13 (1803)?; Sm. Engl. Bot. 
t. 2401 (1812); Hook. in Sm. Engl. Fl. v. p. 170; Tayl. in 
Mackay Fl. Hib. ii. p. 112; Turn. & Borr. Lich. Brit. p. 67. 
V. communis var. aspergilla 8. F. Gray Nat. Arr. i. p. 491 (1821). 
Differs from the species in the prominent, generally sparsely 
scattered and densely sorediose verruce. It has been quoted by Hue 
(Bull. Soc. Bot. xxxvii. p. 95) as synonymous with P. multipwncta, 
and the continental plant which is saxicolous may possibly belong to 
that species, but the British specimens give the same chemical 
reaction as P. velata. 
Hab. On trees and palings in inland situations.—Dzistr. Rare in 
S. and Central England.—B. M. New Forest, Hants; St. Leonard’s 
Forest, Sussex ; Sevenoaks, Kent; Shiere, Surrey; Quantock Combes, 
Somerset ; Hay Park, Herefordshire ; Ickworth, Suffolk. 
