





NEW OR NOTEWORTHY PORTO RICAN FUNGI 



F. L. S T E V E X s 



* 



(with FOUR figures) 



Anthostomella rhizomorphae (Ktz.) B. and V.— The spots 

 caused by this fungus are pale to yellowish and are much swollen, 

 so that they present a general aspect of insect galls. They are 

 0.5-1 cm. in diameter, circular, or when marginal more or less 

 extended. Each spot contains several perithecia which are medially 

 located in the leaf, that is, about equally distant from upper and 

 lower epidermis. They are about 700 \i in diameter, thin- walled, 

 the wall colorless, and have a coarse, hyaline mycelium extending 

 throughout the spot, a black clypeus form in later stages occupying 

 all of the space between the perithecium and the lower epidermis, 

 which is 230-470 \x in diameter; the ostiole 40-50 /x in diameter. 

 The paraphyses are numerous, threadlike, simple, septate, hyaline; 

 asci oblong, stipitate, 150-175 or even 200 /JLX50 /x, thin-walled, 

 8-spored, inordinate. Spores oblong, 24-40X14-17/^ brown when 

 mature and 1 -celled; the inner wall is uniform; the brown outer 

 wall is pale yellow, wrinkled, and takes on very different appear- 

 ances with different ages. Pycnidia are associated with the peri- 

 thecia apparently on the same mycelium, oval, 125 /jl across, 218 

 deep, with a thin clypeus; basidia short, simple; conidia oblong, 

 pointed, obscurely 1 -septate, pale straw colored, 3X10 ju. 



On Rhizophora Mangle. Guanica, 2484; Penueles, 45591 Ponce, 8591, 

 9070; Catano, 7607; San Jose Laguna, 9215. 



The type is described on "coriaceous leaves" from Suriname, and may 

 well have been on Rhizophora. The fungus is quite striking in appearance, 

 but might be readily mistaken for an insect gall and thus overlooked by 

 mycologists. The large spores with the several-layered coats, which give 

 very striking appearances as they mature, are interesting structures. 



Linospora trichostigmae, sp. nov. — Spots indefinite, 5-10 mm. 

 in diameter, thickly studded with perithecia. Perithecia spherical, 

 150 to 200 to 250 ju in diameter, covered by a distinct clypeus 

 and surrounded by a narrow (30-100 /1) pale zone. Clypeus 



399] 



[Botanical Gazette, vol. 70 



