PAPERS ON BOTANY 201 
Verticillium Nees 
Verticilluum heterocladium Penz. 
LaRamona (Johnston), 1018. 
Pellicularia Cooke 
Pellicularia koleroga Cke. 
On Coffea arabica, Mayaguez, 9488. 
Monosporium Bon. 
Monosporiwm uredinicolum sp. nov. 
Mycelium floccose, byssoid, forming white, moldy spots 1-2 
mm. in diameter over each rust sorus. Hyphae hyaline, sep- 
tate, very sparsely dichotomously branched. Conidiophores in- 
distinguishable from the mycelium, simple or sparsely dicho- 
tomously branched. Spores acrogenous, solitary or rarely 
catenulate, 12-15 », hyaline, continuous, cylindrical, obtuse at 
each end. 
On Coleosporium ipomoeae on Ipomoea batatas, No. 6668 
(type). 
Host determined by Dr. Arthur. 
This fungus was very common at the place of collection. A 
large field of sweet potatoes was badly rusted. Apparently 
every leaf in the field bore numerous rust sori and apparently 
every sorus was overgrown with this fungus. Its hyaline 
mycelium is found covering the sorus and growing in and 
around each rust spore. 
Trichothecium Link 
Cephalothecium Corda. 
Trichothectum fusarioides. Sp. nov. 
Colonies cottony, white, 2-5 mm. in diameter, surrounding 
the parasitized Phyllachora. Mycelium hyaline, septate, serile, 
mainly creeping, 2 » thick, mainly branching at right angles. 
Conidiophores erect or ascending, long, 100 », and extremely 
attenuate, 1 » at tip, septate, unbranched. Spores borne soli- 
tary but accumulating in bunches of 10 to 50 on the tips of the 
