1812. Oidium fru c tig en um . SclvracL. “ Fruit Oidium.”
Tufts snboompact, at first villous, with white branched flocci,
then with simple, cream-coloured flocoi breaking up into oval,
pellucid joints.—Berh. Eng. FI. v. p. 349. Kunze. Myc. Steft.
t. 2 ,/. 22. Torulafructigena. Pers. Ohs. t. 1 ,/. 7. Corda. ii./. 34.
On decayed pears, apples, plums, &c. [United States.]
“ There is a distinct hemispliffirio black stroma resembling a Sclerotium.
Cream coloured, greyish or fawn-coloured.”—M. J. B.
1813. Oidium fa sc icu la tum . Berit. “ Fasciculate Oidium.”
Filaments branched, somewhat fasciculate, erect, forming
spreading tufts, white at first, at length of a fine glaucous hue.
Berh.Fng. F I . y . p. 349. Acrosporium fasciculatum. Grev. Fl.
F d .p . 469.
On putrefying oranges.
“ Commencing at first in minute, distinct, pulverulent spots, which
speedily become confluent and deep glaucous.”—Grev.
1 8 1 4 . Oidium p o rz ig in is. Mont. M.S.S. “ Porrigo Oidium.”
Mycelium flexnons, simple, branched or forked, without
septa; spores ovoid, or triangular or quadrilateral, with the
angles rounded, variable.—®. ^ Br. Ann. N.H. no. 546. Achorion
Schai/ileinii. Remate in Robin, t. 3 ,/. 10. Fox, shin diseases 1863,
t.i.f. 1. Küchenmeister t. 3 ,/. 6.
On Porrigo lupinosa.
1815. Oidium favozum. B .& B r . “ Honey-comb Oidium.”
Flocci erect, septate ; spores yellow, short, suhcylindrical.—
Ann. N.H. no. 762,1.16, f 14.
On honey-comb.
Flocci erect, white, septate, and slightly torulose below ; above bearing
a few short cylindrical yellow spores. These spores when fallen seem to
acquire a septum, and then to be gradually attenuated a t either end. Anew
septum is then formed in either division constituting an irregularly fusiform
lo iy .-B .& B r .
1816. Oidium aeqiiivocum. B . ^ B r . “ Equivocal Oidium.’’
Tufts inconspicuous to the naked eye; flocci of spores, erect,
simple; spores elongated, apiculate at each end, diaphanous,
whitish.—Ann. N.H. no. 821. Torula cequivoca. Corda, ii. t. 9.
/ . 37.
On Polyporus Schweinitzii.
1817.
M U C E D IN E S .
Oidium concentzicum.
Oidium.”
B. 4' Br. “ Concentric
Tufts delicate, maculæform, rounded, scattered, sometimes
confluent ; flocci erect ; spores straight, large, fusiform, greyish-
^Mte. ®. # Br. Ann. N.H. no. 547. Cylindrosporium concentricum.
Ung. Fxan. t. 2, / . 9. Fusisporium urticæ. Desm. exs. no.
230. Ann. Sc. Nat. (1838), x .p . 309.
On leaves of various plants.
Variable. In ail the forms we believe that the threads protrude through
the stomata. Amongst the spores some occur which are large and uniseptate
I t ia possible th at after the spores fall they may increase in size.—
B .^B r .
OiDiDM MONILIOIDES. Lh. See Frysiphe graminis.
O id iu m t u o k e r i . ®. Gard. Chron. 1847, p. 719. Ann. N.H.
” *^’O iD roM ABORTIFAOIBNS. ®. Ann. N.H. no. 545. Frgotetia
abortifaciens Quehett. See Claviceps purpurea.
O id iu m b a l s a m i i . Mont. B. # Br. Ann. N.H. no. 763. Gard.
Chron. Ap. 15, 1854, on Verbascum nigrum and strawberries.
O id iu m e r y s i p h o id b s . Fr.
O id iu m l e u c o c o n iu m . Desm. Berh. exs. no. 100. See Sphæ-
rotheca pannosa.
These are all conidiophorous conditions of other fungi.
Gen. 2 3 7 . ST Y SA N U S , Corda.
Stem erect, carnoso-cellulose, apex expanded
into a hemispherical or cylindrical
head ; spores simple, apiculate at each
end, connate in simple or branched moniliform
threads.—Corda. Icon. i.p . 22.
{Fig.272.)
1818. S ty san u s stem o n itis.
“ Clavate Stysanus.”
Corda.
Gregarious ; stem simple, slender,
brown-black, filirous, ending above in a
cylindrical head of spores; threads of
spores slightly branched, glaucous ; spores
oval, concatenate, glaucescent, diapha-
jv;g_ 272. nous, often with a solitary nucleus.—
Corda '. Icon. i. / . 283. Fchl. exs. no. 175. Periconia stemonitis
Pers. Syn. t. 3 ,/. 15.