—72— 



when thus swollen, whether L. huUatum with its immensely swollen apothecia, or 

 L. phyllocarpum with its apothecia prettily decorated with small thalline out- 

 growths, or L. marginellum with its numerous, although rather small marginal 

 apothecia. Other Leptogium species observed are: L. foveolatum (?), L. lacerum, 

 L. phyllocarpum v. isidiosum, and L. tremelloides in several forms. 



Peltigera, too, was frequently met with. All over the garden grew P. canina. 

 It, too, was found in shady places along the trails, where P. polydactyla was also 

 found. On an exposed rocky ledge, where the sun could shine on it much of the 

 day, grew P. canina v. laciniaia, so very different from the species, when growing 

 in shady places, that perhaps Mr. Merrill is right in giving it a new varietal name.^ 



But one species of Physcia was found, P. obscura v. endococcina. It grew on 

 rocky ledges in rather open places. It was not very abundant. Instead of 

 Ph\scia, one here finds much Anaptychia. 



Again, but one species of Dermatocarpon was found, D. miniatum. It was 

 not very abundant, only one or two ledges seeming suited tor its development. 

 In this connection, I can add that I was rather surprised not to find any species 

 of Gyrophora or Umbilicaria. Rocky ledges were there in abundance that 

 seemed ideal habitats for these plants, but none were found. 



Pannaria was also found, but I have thus far only determined P. pannosa, a 

 very pretty species, not very common, which was found growing on tree trunks 

 in shady ravines. Its interesting prothallus, persisting, and of the appearance 

 of a thick felt-like black nap, is sure to attract attention. Closely related to 

 Pannaria, is Coccocarpia pellita, which is at home on rocks exposed to the broad 

 sunshine, and is very common. 



One species of Coenogonium was found, it may be C. Leprieurii, but the 

 hyphae are much broader than the diameter given for that species. One species 

 of Calicium was also found. It seems to be C. salicinum. Erioderma Wrighlii 

 was found in several places, on tree trunks, on dead wood, and on the roof of the 

 laboratory. Part of the material collected is sufficiently different to warrant a 

 varietal name. 



Crustose Forms 



Among the crustose forms I found much that was interesting and new. In 

 number of forms, they equalled about half the total number collected. Much 

 work still remains to be done, before a final report can be made on what was col- 

 lected. 



I shall mention first Haemaiomma puniceum. It, on account of its brilliant 

 scarlet apothecia, is sure to attract attention. It was not very abundant, and 

 was very much at home on the cedars in the garden. It seemed to me much 

 handsomer than our southern species. 



Another Lichen that was only occasionally found, but which is sure to attract 

 attention, is Glyphis cicatricosa. It was found only on trees in the garden at 

 Cinchona. 



'' Merrill's Lich. Exsir. No. 40. 



