242 34. CLADONIACEAE [ 130. Baeomyces 



ish above; paraphyses unbranched; asci clavate to cylindrico-clavate; spores 8, 

 hyaline, non-septate, ellipsoid to oblong-ellipsoid. 



The algal host is Pleurococcus or rarely Gloeocapsa-like. 



A. Thallus granulose to scurfy-squamulose 

 B. Spores not more than 16 xi in length 



C. Thallus smooth to somewhat scurfy 3. B. absolutus 



C. Thallus granulose to scurfy-squamulose 2. B.rufus 



B. Spores reaching 20-26 xi in length 



C. Stipes of medium length or shorter; apothecia 1.S-2.S mm. across 4. B. roseus 



C. Stipes rather long; apothecia 2-4 mm. across 5. B. fungoides 



A. Thallus subfoliose, more or less lobed 1. B. placophyllus 



1. Baeomyces placophyllus Ach., Meth. Lich. 323. 1803. 



Thallus rather thick, greenish to greenish gray or whitish, subfoliose, wrinkled, 

 folded, and lobed, the lobes short, round, sometimes imbricate, the margins sub- 

 crenulate; stipes often flattened, commonly short, whitish, sprinkled with round 

 and elevated squamules; apothecia small to middle-sized and large, 1.5-4 mm. 

 across, the disk flat to convex, reddish brown, the exciple soon disappearing; spores 

 long-ellipsoid to fusiform, 10-15 X 2.5-3.5 xi. 



On sterile soil of slides or banks of streams, White Mountains, New Hampshire. 



2. Baeomyces rufus (Huds.) Rebent., Prod. Fl. Neom. 315. 1804. 



Lichen rufus Huds., Fl. Angl. 443. 1762. B.byssoides (L.) Ach. B.rufus f. 

 sessilis Nyl. Biatora byssoides (L.) E. Fries. 



Thallus rather thin, greenish gray to whitish, granulose, the round granules 

 passing into a scurfy-squamulose and crenate-lobulate, continuous or more or less 

 scattered crust; stipes often flattened and furrowed, rarely divided above, some- 

 times granulose or corticate, reaching 3-4 mm. long, or rarely very short or want- 

 ing, of the same color as the thallus, naked portions tan to brown; apothecia 

 small, 0.7-1.75 mm. across, round to irregular, the disk flat to strongly convex, 

 brownish flesh-colored to dark brown, the exciple soon disappearing; spores ellip- 

 soid, 8-15 X 3-4 fi. (Plate 20 a.) 



On soil and rocks, from New England to Florida, and westward to Minnesota, 

 Oregon, and Washington. 



3. Baeomyces absolutus Tuck., Am. Journ. Sci. 28:201. 1859. 



Thallus thin, greenish, smooth to somewhat scurfy; stipes short, whitish; 

 apothecia small to middle-sized, 1.5-2 mm. across, becoming flexuous, the disk 

 pale flesh-colored, flat, the exciple loose and usually basal, disappearing; spores 

 oblong-ellipsoid to ellipsoid, 10-16 X 4-6 /x. 



On sand, wet rocks, and soil, North Carolina, Florida, and Alabama. 



4. Baeomyces roseus Pers., Ann. Bot. Usteri 1:19. 1794. 

 Dibaeis rosea (Pers.) Clements. 



Thallus granulose, greenish gray to whitish, the granules raised and becoming 

 spheroidal, often passing into a continuous, more or less roughened crust; stipes 

 stout, of medium length, or rarely very short, sometimes furrowed, rarely divided 

 toward the top, whitish; apothecia middle-sized, 1.5-2.5 mm. across, subspherical 

 to flattened, becoming flexuous, the disk strongly convex, flesh-colored, the exciple 

 soon disappearing; asci cylindrico-clavate; spores oblong-fusiform to fusiform, 

 11-26 X 2-3 fi. 



On sterile soil, from New England westward to Ohio and Kentucky, and 

 southward to Florida. 



5. Baeomyces fungoides (Swartz) Ach., Meth. Lich. 320. 1803. 



Lichen fungoides Swartz, Prod. Lich. Ind. 146. 1788. B. roseus var. fungoides 



Tuck. 

 Thallus granulose, the granules raised and sometimes spheroidal, passing finally 

 into a crust; stipes rather long, often granulose, whitish; apothecia middle-sized 



