510 



BOTANICAL GAZETTE [june 



conidiophores. Cultures of Acrothecium lunatum frequently show a secondary 

 group of spores borne below the apical group. Furthermore, the 2 hosts 

 being so widely separated phylogenetically, it is probable that they would 

 not be attacked by the same parasite. 



Cercospora Fries 

 Cercospora personata (B. and C.) Ellis, Jour. Mycol. 1885. 



On the leaves of Arachis hypogaea L., Trujillo Alto, August 17, 1915, nos. 

 2506, 2447. 



These specimens agree in general with the species, comparison having been 

 made with reliable exsiccati. They do present a peculiarity, however, in that 

 the spots are consistently smaller, and much more regularly circular in outhne. 



Trichostroma Corda 



Trichostroma axonopi, sp. nov. — Spots oval to linear, yellowish 

 with a definite brownish or purple border. Sporodochia gregarious, 

 black, globular to oval, verruciform, often confluent, 95-125 m long. 

 Setae black, straight or the tips sometimes repand, rigid, base 

 bulbous, 65-85 M long, few-septate. Conidia brown, globular to 

 ovoid, 5 M in diameter. 



On leaves of Axonopus compressus (Sw.) Beauv., College grounds, Maya- 

 guez, May 30, 1913, no. 924 (type). 



EXPLANATION OF PLATE XVIII 



Fig. I. — Acrothecium falcatiim: conidiophore and conidia (a, h, c). 



Fig. 2. — Phyllachora ischmaemi: section of stroma. 



Fig. 3. — Phyllachora ischmaemi: ascus. 



Fig. 4. — Phyllachora quadraspora: ascus. 



Fig. 5. — Phaeosphaerella paspali: ascus. 



Fig. 6. — Coniothyrium marisci: section of pycnidium. 



Fig. 7. — Coccomyces miisae: ascus and ascospores. 



Fig. 8. — Coccomyces clusiae: habit sketch of single ascoma. 



Fig. g.^Coccomyces clusiae: old and empty ascoma showing honeycombed 

 appearance of floor. 



Fig. 10. — Coccomyces clusiae: cross-section of ascoma showing localization 

 of ascus producing hymenium which results in honeycombed appearance seen 

 in fig. 9. 



Figs. 11-16.^ — Meliola asterinoides. 



Fig. II.— Beginning of perithecium: a, large swollen tip; b, smaller 

 thumbUke projection. 



