204 BOTANICAL GAZETTE | MARCH 
the leaves and dead areas on the petals, together with more or less 
deformation of the blossoms. Spots at first orbicular and definite in 
outline but later becoming confluent and irregular. Acervuli numer- 
ous, 50-150 p in diameter, often confluent ; stroma usually only slightly 
RBS ONO SS | 
FIG. 1. COLLETOTRICHUM VIOL&-TRICOLORIS R. E. Smith: 4, affected 
leaflet; 6, several confluent acervuli with mycelium, sete, and conde 
¢, single acervulus, more enlarged; d, basidia and production of conidia; 
é, conidia; f, affected blossom. 
developed but sometimes abundant and forming a sort of pyenidium, 
closely approaching Vermicularia. Sete mostly single or in pails, 
20-70 long, deep brown, once or twice septate, tapering gradually to 
a point. Basidia short, hyaline. Conidia oblong or slightly curve™ 
with blunt ends ; hyaline, continuous, granular with vacuoles; averag: 
ing 20 X 5u.— Racpu E. SMITH, Amherst, Mass. 
A NEW BIENNIAL-FRUITED OAK. 
(WITH PLATES U, II!) = 
Quercus ellipsoidalis, n. sp.— Trees 3-10™ in diameter, on. 4 
with an oblong head, the spray fine and repeatedly dividing; the ” 
drooping: 
often descending low down on the trunk and the lowermost 
. . ar: 
The bark is close, rather smooth, divided by shallow fissures into ® 
