4 
JOURNAL OF MYCOLOGY 
LVol. IV, No. 1, 
more distinctly attenuated above, granular, subolivaceous and becoming 
finally 4—6-septate. The microscopical characters do not differ greatly 
from those of C. Physalidis, Ell., but that species is on definite spots and 
the hyphse are rather longer and paler. 
Cercospora fraxinea, E. & E.—On dried-up leaves of Ash. Man¬ 
hattan, Ivans., July, 1887, W. T. Swingle. Spots amphigenous, but more 
distinct below, indefinite or limited by the veinlets, mostly confluent, 
occupying considerable areas of the leaf, subolivaceous; tufts amphigen¬ 
ous, punctiform, densely crowded; hyphse closely tufted, spreading, 
olivaceous, more or less crooked, 80—40 x 5—0 /'-, at length more or less 
septate ; conidia cylindrical or at length slightly attenuated above, 1-3- 
septate, subolivaceous, mostly 25—35 x 5—6 but some of them reaching 
50 ! J - long and then more attenuated above. This is allied to C. fraxinites, 
E. & E., but that is on definite spots and has the hyphse much shorter 
and conidia narrower. C. siiperflna , Ell. & IIolw., also resembles this 
somewhat, but differs in its much longer (75 !>■) conidia, which are more 
deeply colored and have a long attenuated tip. 
Cercosfora sedoides, E. & E.—On living leaves of Penthorum 
sedoides. Manhattan, Kans., July, 1887, W. T. Swingle; Iowa, Dr. Ilal- 
sted. Amphigenous, forming indefinite and inconspicuous, slightly rusty 
colored spots 4—4 cm. in diameter, more distinct above and more or Jess 
confluent and always quite indistinct, giving the leaf a sickly, ferrugi¬ 
nous tint; hyphse arising mostly through the stomata of the leaf in 
scanty, spreading tufts, 15—20 x 24—3 continuous, subfuscous, subden- 
ticulate and subundulate above or nearly entire; conidia slender, obcla- 
vate-linear, yellowish-hyaline, 2—4-septate, mostly 40—55 x 24—3 /'• wide. 
Cercosfora subsanguinea , E. <fc E.—On leaves of Smilacma Cana¬ 
densis. British Columbia, June, 1887, Prof. John Macoun. Spots amphi¬ 
genous, subelliptical, light ferruginous, thin, becoming paler in the center, 
2-3 millim. in diameter, subdefinite, scattered or subcontinent; tufts 
hypophyllous, minute, scattered, light pale red; hyphse pale, reddish, 
50-70 v- long, slender (mostly less than three /* thick) imperfectly 
branched above; conidia subcylindrical, 20—30 x 3—4 nucleate, mostly 
obtuse at the ends. Resembles somewhat C. cruenta. 
Cercosfora atra, E. & E.—On living leaves of IHospyrus Virgin¬ 
ian a. Eaulkland, Del., August, 1887, A. Commons. Spots amphigenous, 
black, subsingular, 1—2 millim.; hyphse hypophyllous, in minute tufts, 
arising from a tubercular base, 40—75 x 3—4 continuous, dark, den¬ 
ticulate and subgeniculate above ; conidia obclavate, curved, olivaceous, 
2—3-septate, 35—55x 3 !>-. Quite distinct from C. Diospyri, Tlium., on 
account of its definite black spots and shorter conidia. 
Cercosfora seminalis, E. <fc E.—In spikelets of Buchloedactyloides. 
Manhattan, Kans., July, 1887, W. T. Swingle. Forming a compact, 
olivaceous mass enclosed by the spines of the involucre. The mycelium 
penetiates the seed, which it blackens and destroys, sending up between 
the tips of the enclosing palese a dense growth of fertile hyphse, which 
are of a pale olivaceous color, very long, branched and obliquely truncate 
above, septate below and bear at their tips the subhyaline, obclavate, 
granular, becoming 3— 5-septate, 80—110 x 6—7 !> conidia. 
