123 
m 
scattered over the spots; conidia brownish, swollen or enlarged above, 
2-2.5;/ thick, and,with the slender filiform base, 40-75/f long, nucleate, 
becoming faintly 1-3-septate. 
Many of the conidia lacking the slender base are much shorter 
(20-25//). On leaves of Pentstemon Cobcea (No. 546) and P, grandi- 
flora (cult.) No. 566. June. 
Cercospora chionea. — Amphigenous but mostly epiphyllous, 
on large (•S-i''"'-, or, by confluence, 3-4*"™') dark reddish brown spots 
with a brown, yellow-shaded, but not raised, border; hyphae densely 
tufted, subhyaline, mostly 18-30 x 4-5/^, but often elongated to 35 or 
40// and then somewhat undulate or crooked above; conidia vermi- 
form or clavate-cylindric, 54-90 x 4-5/^ and 3-8-septate. 
The conidia are very abundant and appear to the naked eye like 
a sprinkling of white powder on the brown spots. Different through- 
out from C. cercidicola, Ell. On leaves of Cercis Canadensis. July. 
No. 580. 
Cercospora murina. — Hypophyllous, on large (.5-i''"^')j roundish, 
indefinitely limited, dirty brown spots (dirty white above); hyph^ 
effused, mouse-colored, branched, septate, clear fuscous brown, 
75-100 X 3-4/^; conidia oblong or oblong-cylindric, 3-septate, brown- 
ish, sometimes slightly constricted at the septa, 25-35 x 4-5/^. 
Looks like a fine mouse-colored down overrunning spots previ- 
ously occupied (?) by another Cercospora (C granuliformis, E. & H.) 
Cercospora velutina. — Amphigenous; hyph^ pale olivaceous, 
simple, continuous, more or less bent and toothed above, forming a 
dense velvety growth over the surface of little dark-colored tuber- 
cular swellings i"''^- or less in diameter, which are collected in groups 
or irregularly scattered over the surface of the leaf; conidia pale 
olive-brown, subequal or attenuated above, curved, sparingly septate 
75-100 X 3//. 
On leaves of Baptisia, Aug. No. 622.- 
Ramularia GRINDELT.E, — Amphigenous, erumpent, punctiform; 
hyphie densely tufted, simple, hyaline, straight, 18-25 x 3-4A*; conidia 
cylmdnc, straight or slightly curved, hyaline, 1-2-septate, 20-40 x 
3-4A 
The tufts of hyphae (150-200/i in diameter) are collected in 
little groups forming rusty yellow specks thickly scattered over both 
sides of the leaf and finally whitening out. ■ 
This might be referred to Cercospora from its habit and mode of 
growth, but the conidia and hyaline hyphse are those of Hamularia. 
On leaves of Grmdelia squarrosa. Aug. No. 616. 
Sph.erella decidua.— Perithecia visible on both sides of the 
leaf, of coarse cellular structure, depressed-globose, loo/i in diam., 
asci oblong, sessile, 50 x 15;/; sporidia crowded or biseriate, oblong 
or oblong-pyriform, uniseptate and constricted, mostly a little curved, 
12-11 x 4-5 /Y; perithecia in small (i-r.5"""') round, dull white, trans- 
lucent spots with a narrow raised border; spots on dead, discolored 
parts of the leaf which finally fall out and leave irregular-shaped holes 
as if the leaf had been eaten out by insects. 
On living leaves oiVemonia. June. No. 556. Also on ScropJni- 
laria nodosa (No. 563); spots white and more confluent and mostly 
not on dead, but living green parts of the leaf. 
