114 HEPPIA. 



Rocks. Needham near Boston, and at Harper's Ferry in 

 Maryland, Tuckerm an in Nyl. Pyrenoc. 1858. Arkansas, Peters. 



California, Bolander. Lecanorine apothecia have been only 



very recently detected in the European lichen ; they have not 

 been observed here. 



2. E. Bolanderi, Tuck. herb. ; thallus minute, crowded in 

 imbricate patches, coriaceous-membranaceous ; from olivaceous 

 becoming dark-brown; crenate-lobate; with raised, scarcely 

 powdery margins ; beneath smooth, pale-brown ; apothecia very 

 small, innate-sessile, lecanorine; a tumid, entire margin border- 

 ing a red-brown disk. Spores very minute and numerous, ellip- 

 soid, simple, without colour. Pannaria, sect. Endocarpiscum, 



Tuckerm. Gen. p. 51. 



Rocks. Ukiah, and elsewhere, California (Bolander), Tuck- 

 erman I. c. 1872. The smaller thallus is thinner and darker than 

 that of E. Guepini (with which the present sometimes grows), 

 and, together with the scutellaeform apothecia the only sort yet 

 observed suggests rather a Collema. 



XX. HEPPTA, Naeg. 



Apothecia orbicular, immersed, and mostly depressed in 

 the thallus, and immargiuate. Spores ovoid, simple, de- 

 colorate j now (2) numerous in the thekes. Spermatia ellip- 

 soid j on sub-simple sterigmas. Thallus squamose-foliace- 

 ous, monophyllous, more or less continuously corticate 

 beneath, where it is closely attached to the matrix by pale 

 Irypothalline filaments. Gonimous layer constituted of go- 



nimia. The external resemblance of the very commonly 



saccate-depressed apothecia of n. 1 to those of Solorina 

 .saccata is the only feature associating it seemingly with 

 Solorina rather than Pannaria. 



1. H. Despreauxii (Mont.) Tuckerm. ; thallus small to minute, 

 -orbicular, dull, smoothish, or at length rimulose-rugulose ; from 

 pale- becoming olivaceous-green; with finally raised, repaud, 

 and crenate-lobate edges; beneath mostly pale; apothecia soli- 

 tary in small fronds, but now numerous in larger ones, small to 



middling; disk red-brown. Spores ^ mic. Tuckerm. Gen. 



p. 46. Solorina, Mont. PL Cell Canar. p. 104, t. 6, /. 5 (sporis 

 .excl). 



