29 
7S2. 
microbola Tuck. 
Canada. 
783. 
c. Spores muriform. 
terrestris Th. Fr. 
Arctic. 
784. 
74. Pyrenula (Ach., Nseg. & Hepp) Tuck. 
a. Spores decolorate, except 784 & 785. 
pygratea (Kbr.) Tuck. Greenland. 
785. 
** thelena (Ach.) Tuck. 
U. S. 
var. ** micula (FI.) 
u. S. 
786. 
** punctiformis (Ach.) Naeg. 
U. S. 
var. fallax Nyl. 
787. * quinque-septata (Nyl.) Tuck. 
Southern. 
788. 
* subcinerea (Nyl.) Tuck. 
Southern. 
789. 
* cinchona) (Ach.) Tuck. 
Southern. 
790. 
subprostans (Nyl.) Tuck. 
Southern. 
791. 
** gemmata (Ach.) Nasg. 
Northern. 
792. 
* tropica (Ach.) Tuck. 
Southern. 
793. 
** hyalospora (Nyl.) Tuck. 
U. S. 
794. 
b. Spores colored. 
* aggregata Fee. 
Southern. 
795. 
ocliraceo-flava (Nyl.) 
“ Mexico.” 
796. 
** leucoplaca (Wallr.) Kbr. 
Northern. 
797. 
**glabrata (Ach.) Mass. 
U. S. 
798. 
*maniillana (Ach.) var. Santensis (Nyl.) 
Southern. 
799. 
** nitida Ach. 
N. Am. 
var. nitidella Flk. 
Southern. 
800. 
*pachycheila Tuck. 
Southern. 
801. 
thelomorpha Tuck. 
N. Car. 
802. 
**lactea (Mass.) Tuck. 
U. s. 
803. 
geminella Ach. 
Mexico. 
804. 
§ spinulosa Schwein. 
N. Car. 
r 
805. 
75. Pyrenastrum Eschw. 
* astroideura (Fee) Eschw. 
Southern. 
806. 
Ravenelii Tuck. 
S. Car. 
807. 
76. Strigula Fr. 
* complanata (Fee, Mont.) Nyl. 
Southern. 
808. 
actinoplaca Nyl. 
Mexico. 
809. 
PSEUDO-LICHENS. 
1. Abrothallus DN. 
** Smithii Tul. 
Mass. 
810. 
**oxysporus Tul. 
Mass. 
