102. Synechoblastus ] 28. COLLEMACEAE 155 



7. Synechoblastus pycnocarpus (Nyl.) Mull. Arg., Flora 69:308. 1886. 



Collema pycnocarpum Nyl., Svn. Lich. 1:115. 1858. Dicollema pycnocarpum 

 (Nyl.) Clements. 



Transforming the algal colony into a small to middle-sized, irregularly lobed, 

 smooth to minutely granulose, olive-green to greenish black body, the lobes long, 

 more or less branched, with ascending to erect, densely wrinkled and minutely 

 lobed margins ; greenish to brownish green below ; apothecia small, 0.4-0.8 mm. 

 across, sessile, marginal on the erect or ascending lobes, the disk fiat to convex, 

 brown or reddish brown, the algoid exciple thin, sometimes disappearing; hypo- 

 thecium cloudy; spores ovoid to ovoid-ellipsoid, 1-septate, 11-20 X 3.5-6.5 /x. 



On trees, from New England to Florida, and westward to the Rocky Mountains. 



8. Synechoblastus fascicularis (L.) A. L. Smith, Mono. Brit. Lich. 1:61. 1918. 

 Lichen fascicularis L., Mant. 133. 1767. 5. conglomeratus (Hoffm.) Koerb. 



Collema jasciculare (L.) Wigg. 



Transforming the algal colony into a small, round to somewhat irregular, mi- 

 nutely branched, blackish green body, the branches ascending or erect, short, 

 crowded, clavate to fan-shaped; apothecia small to middle-sized, 0.6-1.7 mm. 

 across, sessile, more or less crowded, 1-several toward the tip of each branch, the 

 disk flat to convex, dull red to reddish brown, the algoid exciple thin, becoming 

 crenulate; hypothecium hyaline to tinged brownish; spores fusiform, 1-3-septate, 

 18-26 X 5.5-7 fi. 



On trees and soil, Nebraska and California. 



9. Synechoblastus polycarpus (Hoffm.) Dalla Torre & Sarnth., Flecht. Tirol. 



575. 1902. 



Collema poly car pum Hoffm., Deutsch. Fl. 102. 1796. Collema melaenum var. 

 polycarpon Nyl. 



Transforming the algal colony into a small, dark green to reddish or blackish, 

 radiately lobed body, the lobes short, narrow, folded and ascending toward the 

 center, wider and less elevated toward the circumference; apothecia small to 

 middle-sized, 0.5-1.5 mm. across, numerous, sessile, the disk flat to finally convex, 

 dark red to blackish, the algoid exciple well developed, thick, becoming crenulate; 

 hypothecium cloudy to tinged brownish; spores ellipsoid-pointed, 3-5-septate, 

 17-26 X 6-7.5 /*. 



On rocks and trees, Georgia and Montana. 



10. Synechoblastus cyrtaspis (Tuck.) Fink, Cont. U.S. Nat. Herb. 14:134. 1910. 

 Collema cyrtaspis Tuck., Proc. Am. Acad. 5:387. 1862. 



Transforming the algal colony into a small to middle-sized, tough, round to 

 irregular, much lobed, olive-green to greenish black body, the lobes narrow, fenes- 

 trate, bearing many ascending, marginal lobules; apothecia middle-sized, 1-2 mm. 

 across, sessile, more or less clustered on the lobules, the disk flat to convex, dark 

 chestnut-brown or reddish brown, the exciple thick, becoming crenulate, sometimes 

 disappearing; hypothecium hyaline to cloudy; spores subfusiform, 3-septate, 16-25 

 X 3-7 /a. 



On trees, from Massachusetts to Florida, and westward to Arkansas and Minne- 

 sota. 



11. Synechoblastus microptychius (Tuck.) Fink n. comb. 

 Collema microptychium Tuck., Lich. Calif. 35. 1866. 



Transforming the algal colony into a small, irregularly lobed, blackish green, 

 cushion-like body, the lobes ascending, folded, deflexed, crowded, with crenate 

 margins; apothecia minute to small, 0.2-0.8 mm. across, sessile, more or less 

 scattered, the disk flat, reddish brown, the algoid exciple thin, entire; spores fusi- 

 form, several-septate, 30-44 X 4-6 fi. 



On trees, Massachusetts. 



