1884- These are, so tar as I am aware, the only known stations in 
Massachusetts. 
7- L. variil, (Ehrh.) Nyl. On trees and rails. Common. 
b. symmicta , Ach. On trees and dead wood. But some of the 
plants so referred are so lecideoid in appearance that they must 
be considered as doubtful; and the spermatia have not been ob¬ 
served. 
e. step incola , Fr. On cypress, Howland’s spring swamp, 1885, 
(vera), and on rails, with the same reservations as in the fore¬ 
going. 
8. L. Cupressi, Tuck. On cypress, I874. Rare. 
9. L. Oi’OStliea, (Sm.) Tuck. On trees, rarely fertile, 1868. 
10. L. athroocarpa, (Dub.) Nvl. On white birch, N. B.. 1S64; 
but more common on poplar. N. B. and Weymouth. Spermatia 
needle-shaped. 
b. dimera, Nyl. (Nvl.) Tuck. On poplar near Howland’s 
spring, 1873. Rare. 
A plant on rocks, Weymouth, 1875, only found once, with ob¬ 
long, bilocular spores, .013-18 by .0055-7 mm., may perhaps be 
referred here. 
11. L. elatina, Ach. On cypress and dead wood, N. B. and Wey¬ 
mouth. a. is rare. 
b. ochrophcea, Tuck. Common on cypress and hemlock 
spruce. 
c. minor, Tuck. Common on white pine. 
12. L. pallescenSj (L.) Seiner. On trees and dead wood. 
Common. 
b. rosella. Tuck. On beech. Rare. 
13. L. tartarea, (L.) Ach. On rocks, extending to trees. Com¬ 
mon . 
b. <ronatodes , Ach. Only found once, 1881. 
14. L. einerea, (L.) Sommf. On rocks, N. B. and Weymouth. 
Common. 1863. 
b. Icevata , Fr. On rocks, less common. 
c, gibbosa , Nvl. On stones in walls; and the plant referred in 
Tuck. Syn ., p. 198, with spores only .018-25 by .011-13, to 
verrucosa , b. mutabilis r I'. Fr., on rails, Qiiincy, 1870, and also 
on rails. N. B., 1888, seems rather to belong here. 
13. L. lacustris, (With.) Ach. On stones, N. B.and Weymouth. 
