157. Cladosporium trillii Ellis & Everh., Proc. Acad. Nat. Sci. Philadelphia 47: 430. 1895. Figs 317, 318.
Holotype: USA, Washington, Pullman, on leaves of Trillium petiolatum (Melanthiaceae), Jun. 1894, C.V. Piper, no. 341, mixed infection with Phyllosticta trillii Ellis & Everh. (NY).
= Heterosporium trillii Ellis & Everh., Proc. Acad. Nat. Sci. Philadelphia 46: 382. 1894 [holotype: NY].
[equivalent to] Cladosporium trillii (Ellis & Everh.) J.C. David, Mycol. Pap. 172: 94. 1997. nom. illeg., non C. trillii Ellis & Everh., 1895.
[equivalent to] Cladosporium trilliicola J.C. David, Schlechtendalia 11: 88. 2004.
Lit.: David (1997: 94), Schubert (2005b: 144-146).
Ill.: David (1997: 89, fig. 22 C-F; 95, fig. 25), Schubert (2005b: 145, fig. 70, pl. 32, figs A-D).
In vivo: Leaf spots amphigenous, subcircular-elliptical, 2-7(-20) mm wide, with a whitish grey membranous centre, turning greyish brown with dense fructification, margin narrow, brown to reddish brown, sometimes surrounded by a yellowish brown halo. Colonies amphigenous, effuse, scattered, in small tufts, loose to somewhat dense, caespitose, brown. Mycelium internal, subcuticular to intraepidermal; hyphae branched, 2-7 [micro]m wide, septate, sometimes slightly constricted at the septa, occasionally with small swellings, up to 10 [micro]m wide, subhyaline to pale olivaceous or olivaceous-brown, smooth, walls slightly thickened. Stromata small, compact, 15-40 [micro]m diam, composed of subglobose to somewhat angular cells, 5-10 [micro]m wide, pale to medium olivaceous-brown, smooth, walls thickened. Conidiophores in small loose fascicles, arising from stromata, erumpent through the cuticle or emerging through stomata, erect, straight to somewhat flexuous, often geniculate-sinuous, subnodulose or slightly nodulose, unbranched or rarely once branched, 30-155 x 6-9(-10) [micro]m, septate, with only few septa, septa sometimes not very conspicuous, pale brown to medium reddish brown, smooth, walls thickened but one-layered, up to 0.5 [micro]m wide, often somewhat swollen at the base, up to 11 [micro]m wide, slightly attenuated towards the apex, occasionally enteroblastically proliferating. Conidiogenous cells integrated, terminal and intercalary, 6-45 [micro]m long, proliferation sympodial, often geniculate-sinuous, subnodulose or slightly nodulose, conidiogenous loci situated on small unilateral shoulders or multilateral swellings, protuberant, short cylindrical, 1.5-2(-2.5) [micro]m diam, mostly 1 [micro]m high, clearly differentiated in a somewhat raised central dome and a periclinal rim, thickened, somewhat darkened-refractive. Conidia catenate, in unbranched chains, more or less straight, obovoid, broadly ellipsoid to mostly cylindrical, (5-) 11-36(-41) x (3.5-)6-11(-12) [micro]m, (0-)1-4(-5)-septate, sometimes slightly constricted at the septa, pale olivaceous to olivaceous-brown, distinctly verruculose or verrucose, walls only slightly thickened, apex and base rounded or slightly attenuated, hila protuberant, 1-2(-2.5) [micro]m diam, thickened, darkened-refractive; occasionally microcyclic conidiogenesis occurring.
Substrate and distribution: On Trillium spp.; North America--Trillium ovatum (USA, ID, MT, WA), T petiolatum (USA, WA), Trillium sp. (USA, WA).
Additional specimen examined: USA, Idaho, Latah Co., on Trillium ovatum, 14 Jul. 1893, C.V. Piper 128 (NY, holotype of Heterosporium trillii).
Notes: In 1894, Ellis & Everhardt described the new species Heterosporium trillii as causing leaf spots on Trillium ovatum, eventually killing off the leaves. One year later they introduced Phyllosticta trillii on Trillium petiolatum and mentioned a Cladosporium trillii occurring on the same spots for which they...