brittle, when on moss ; thick, soft, mealy, when on bark. Under 
the microscope appears to consist of heaps of spherical globules 
sticking together, of a greyish colour, and dusted with a white 
powder. When wet, it is often greenish, and when rubbed 
between the fingers has an unpleasant smell. Horrman. enum. 7. 
Byssus lactea. Bot. art. ed. ii. On old decayed mosses and 
small branches of heath. Wales and North of England and 
Scotland. P, Jan.—Dec. 
inca’nus. L. ‘Hoary, powdery; like scattered meal. 
‘ Dill, 1. 3.—Hoffman. enum. 1.6. 
It has the appearance of a very small crustaceous Lichen. 
Linn. Even through an eye-glass it appears only as a shape- 
we less powder of a greyish white colour, sometimes intermixed 
with green and yellow. Dirt. When magnified it appears to 
consist of particles of different figures, egg-shaped, oblong, com- 
pressed, open at the top, pouring out a reddish powder. From 
these arise other larger particles, folded at the margin, sending 
out numerous oblong corpuscles, rising up and spreading, turned 
back at the edge and throwing out a yellow meal. Horrm. 
enum. 8, 
Byssus incana. Bot. arr. ed. ii. Gravelly soil on the sides of 
ditches, near high roads, on decayed moss and wet trunks of 
trees in very shady situations. __ A. Oct.—June, 
cine’reus. L, Ash-coloured, powdery; covering the surface of rocks. 
It will grow upon the barest rocks and stones. Hoffman 
thinks this differs from the L. antiquitatis, in age only. It is 
found on rocks and stones of every kind which have been long 
exposed to the air, giving them a greyish colour through the 
whole year, but is in itself so minute as to be hardly distin- 
guishable. i 
_ _Byssus saxatilis. Bot. arr. ed. ii, Limestone rocks and stones 
in Westmoreland, Cumberland, Yorkshire, and Derbyshire. 
: r; Jan.—Dec. 
antiquita’tisL, Black ; powdery. 
Hoffm. enum. 3.5, right hand half- (Dill. 1. 18, cited in Linn. 
mant. 510, and Gmelin is B. nigra, as is the B. antiquitatis 
of Weis.) 53 ake? 
_ Black, resembling irregular dots of ink made witha pen, 
solitary or confluent, very black when wet, greyish black when | 
crowded together. : H IAN. i hie G f és : 
_ Byssus antiquitatis, Bot. arr. ed, ii, Old walls, rocks, and 
large stones, common. = ss CP Jan—Dec 
