—59— 



Lecanactis illecebrosa var. megaspora, var. nov. 



Thallus whitish or white, thin, more or less pulverulent, K — , C — . Apo- 

 thecium medium in size, from brown soon blackening, plane at first, then con- 

 vex, or the larger ones umbonate, with a thin more or less persistent margin, 

 disk naked or white-pruinose, the margin for the most part epruinose. Spores, 

 eight in each ascus, fusiform, one-three septate, the cells regular, 28-33 x 5-6^1 

 hymenium colorless, hypothecium brown, paraphyses distinct, tips dark, hy- 

 menial gel. with 1. -(- wine-red. 



On cedar bark, Near Elwha P. O., Wash., No. 1765. 



Related to the species through its thin, apothecial margin, fusiform spores, 

 color and consistency of thallus and reaction with Iodine. Differentiated in the 

 color of its larger apothecia, and larger spores. Type specimen in herb. Merrill; 

 co-type in Mr. Foster's collection. 



Opegrapha varia var. lutescens Mudd Man., p. 230. 



Thallus variously whitish or sordid. Apothecia as in the species, but with 

 the margins greenish or yellowish-pruinose. Spores fusiform or with one end 

 rounded, five septate, 25-29 x 7^1. 



On maple bark, Renton, Wash., No. 2086. I know of no other record for 

 this Country. 



Verrucaria laevata var. nigrita Leight. Li. Fl. G. Brit. ed. Ill, p. 449. 



Thallus blackish, smooth, rimulose. Apothecia immersed in the thallus, 

 only the apices visible, rather numerous and not large. Spores elhpsoid, simple, 

 14-23 X 7-iom. 



On rocks touched by the waters of Hoods Canal, Hoodsport, Wash., No. 

 2130. No previous record found for America. 

 Rockland, Maine. 



NOTES ON NORTH AMERICAN SPHAGNUM. V 



A. LeRoy Andrews 

 The Section Acisphagnum Carl Miiller 



This large section shows, as already intimated, the greatest differentiation 

 of structures: stem and perichaetial leaves, antheridial leaves, leaves of pendent 

 branches, leaf-border, cortical cells of stem and branches, all mark the section 

 as representing a higher stage of development than the preceding ones. That 

 it embraces a greater number of species and that these, while varying much 

 among themselves, present the most difficult problems of distinction and rela- 

 tionship is hardly to be wondered at. The most distinctive character of the 

 section as a whole is the differentiation of retort-cells in the branch-cortex. It 

 may be further noted that the antheridia are borne on catkin-like parts of the 

 spreading branches with antheridial leaves usually pigmented red or brown 

 according to the species, these leaves differing from the other branch-leaves 

 frequently also in size and shape, in pores and particularly in that the hyaline 

 cells of the lower part of the leaf lack pores and fibrils. The branch-leaves are 

 regularly bordered, normally by two (sometimes more) rows of long narrow cells . 



