CRYPTOGAMIA. ALG. Byssus. (1) Thread-like. 141 
the bottom. Bererus in Linz. suec. #. 1182. Weis says it is 
only a matter formed of the particles of aquatic plants dissolved 
by putrefaction, which being light rise to the surface of the 
water. But I have reason to believe that it will prove to be a 
Conferva, perhaps the C. bullosa. Observing a pond in the 
state of flowering, as the country people term it, I examined. 
some of the. water, but the particles floating in it were so mi-- 
nute that even with the assistance of a very good microscope, 
I could not satisfy myself as to'their figure or structure. Two 
or 3 weeks later in the spring I found threads, not jointed, not - 
branched, either straight or coiled up like a cork-screw., Some 
of this water kept ina glass jar, after-2 or 3 weeks more let its 
contents subside, and then it began to appear like a Conferva. 
The threads soon became much larger, and assumed a jointed 
appearance. : 
1 Stagnant waters. : A. May—Aug. : 
B. Downy, violet coloured, growing on wood. phospho'rea, 
Mich. 90. 3—Dill. 1. 6-Mich. 90. 8. 
Colour-vivid, very beautiful and delicate, much finer than — 
the finest wool. 2 vi 
On the bark of trees and rotting wood. [On the stump of 
-an ash tree which had been cut down; very fine. Mr. Grecor.] 
B. Threads simple, very simple, of a verdigris colour, grugino’sa. 
Se See Ee, we ‘ 
Consists of an extremely fine woolly substance cohering to- 
gether, but so fine that it is not easy to distinguish the fibres, 
Dut. Its colour distinguishes it. Forms an extremely thin 
crust, consisting of powdery filaments extremely minute, col- s 
lected into little heaps. Wes. 
On the stems of dead fern, Core iz Di/l.—and rotten wood. 
Huns. [On the pillars in Roslin Chapel, near Edinburgh. Ie 
had not been found before, since the time of Dillenivs. Dr. | ee s 
E, Smirs.] se : A. Aug.—April. ue 
B. Hair-like ; green : threads branched. veluti‘na. 
Mich. 89. 5—Dill. 1.14. 
'.. Spread upon the ground like a fine green carpet. Consists 
of Pi tee igh fine not to be disringulshed by the naked eye, 
crowded and matted together, branched and not branched, ex- 
tremely short but mostly upright like the pile of velvet. Drux. Rage 
On the ground in the shade,and the moist bark of trees. 
; sac! 2 As Oct.—June, 
B. Filaments simple or branched, very short, upright, : purpurea. 
