156 28. COLLEMACEAE [102. Synechoblastus 



12. Synechoblastus wyomingensis Fink; Hedrick, Mycologia 26:153. 1934. 

 Transforming the algal host into an irregular, ascending, much lobed, smooth, 



dark olive-green and blackening body, the lobes numerous, short, entire or sinuose; 

 smooth and lighter colored below; apothecia small, 0.75-1.4 mm. across, sessile 

 along the margins of the lobes, the disk flat to slightly convex, reddish brown and 

 darker, the algoid exciple prominent, entire, colored like the thallus; hypothecium 

 hyaline; spores 4- rarely 8, ellipsoid-pointed and occasionally extended into an 

 appendage 3-5 fx long, 3-septate, 22-32 X 6.5-9.5 /x. 

 On limestone cliff, Wyoming. 



13. Synechoblastus leptaleus (Tuck.) Fink n. comb. 

 Collema leptaleum Tuck., Proc. Am. Acad. 6:263. 1866. 



Transforming the algal colony into a small, smooth to rough and densely 

 wrinkled, somewhat lobed, dark green to greenish black body, the lobes short, with 

 folded, ascending margins; apothecia small to middle-sized, 0.6-2 mm. across, 

 sessile, more or less crowded, the disk flat, reddish brown, the algoid exciple thin, 

 entire, becoming crenulate; hypothecium hyaline; spores acicular with blunt ends, 

 sometimes curved, 3-5-septate, 25-40 X 2.5-5 fi. 



On trees, from New England to Florida, and westward to Texas and Nebraska. 



14. Synechoblastus ryssoleus (Tuck.) Fink, Cont. U.S. Nat. Herb. 14:135. 



1910. 



Collema nigrescens, ryssoleum Tuck., Lich. Calif. 34. 1866. Collema ryssoleum 

 Tuck. 



Transforming the algal colony into a small, irregularly lobed, smooth to some- 

 what wrinkled, olive-green to blackish brown body, the lobes round, imbricated, 

 with folded, wavy, ascending margins; greenish brown below, reticulated; apothe- 

 cia minute to middle-sized, 0.2-1.5 mm. across, sessile, scattered or more or less 

 crowded, the disk flat to convex, reddish brown to brown, the algoid exciple thin, 

 becoming wavy, sometimes disappearing; hypothecium hyaline to brownish; spores 

 ellipsoid-pointed, 3-5- or rarely 7-septate, 22-34 X 4-7 /x. 



On rocks and rarely on trees, from Maine to Maryland, and westward to Ohio 

 and Minnesota. 



15. Synechoblastus aggregatus (Ach.) T. Fries, Nov. Act. Reg. Soc. Sci. Ups. 



III. 3:380. 1861. 



Collema jasciculare var. aggregation Ach., Lich. Univ. 640. 1810. Collema ag- 

 gregatum (Ach.) Rohl. 



Transforming the algal colony into a middle-sized, round to irregular, lobed, 

 smooth to minutely granulose, conspicuously ribbed, sometimes fenestrate, bright 

 green to greenish black body, the lobes broad, short, with crenate, granulose mar- 

 gins; greenish below; apothecia small to middle-sized, 0.6-2 mm. across, irregular, 

 sessile, crowded on the ridges of the thallus, the disk flat to convex, reddish brown, 

 the algoid exciple thin, entire, rarely becoming granulose; hypothecium hyaline 

 to cloudy; spores fusiform-cylindrical, sometimes curved, 3-5-septate, 35-60 X 

 4-5/*. 



On trees and rarely on rocks, Florida, Alabama, Nebraska, and California. 



16. Synechoblastus leucocarpus (Hook. & Tayl.) Mull. Arg., Flora 70:113. 1887. 

 Collema leucocarpum Hook. & Tayl., Lond. Journ. Bot. 3:657. 1844. Collema 



glaucophthalmum Nyl. Collema aggregatum var. glaucophthalmum (Nyl.) 

 Tuck. 

 Transforming the algal colony into a middle-sized, round to somewhat irregular, 

 folded, ridged and fenestrate, somewhat lobed, light green to blackish body, the 

 lobes round, with ascending margins; greenish below; apothecia small, 0.4-0.8 mm. 

 across, subsessile, the disk slightly concave to flat, reddish brown or obscurely gray- 

 ish pruinose, the algoid exciple becoming crenulate and disappearing; hypo- 

 thecium hyaline to cloudy; spores long-fusiform, 5-7-septate, 40-65 X 4.5-7 fi. 

 On trees, southern California. 



