Phylum：Anamorphic fungi　>>　Class： Anamorphic fungi　>>　 Order： Anamorphic fungi 
   
 
　BCRC Number： 32049      
   
　Scientific Name： Penicillium olsonii
 
   
   
　Author：

Penicillium olsonii Bain. & Sartory, Annls mycol. 10: 398. 1912.

Subgenus: Penicillium
   
 
 
 
 
　Description： CYA, 25°C, 7 days: colony diameters 28-32 mm, dense, center deep, radially sulcate, ve-lutinous, margin thin, effuse; mycelium white; conidiogenesis abundant, greenish grey to greyish green (26-27B-C2-3); exudate clear; soluble pigment absent; reverse golden grey-blond (4C2-4), olive brown (4D3-4) or greyish yellow (4B3-5). MEA, 25°C, 7 days: colony diameters 22-24 mm, plane, velutinous, margin low, effuse, entire; mycelium white; conidiogenesis abundant, dull green (27D-E3-4); exudate and solu-ble pigment absent; reverse greenish grey to greyish yellow (1B2-3), or greyish green (1C2-4). G25N, 25°C, 7 days: colony diameters 9-13 mm, center raised, somewhat sulcate, floccose, margin low, entire; mycelium white; conidiogenesis abundant, greyish green (25C3-4, 25D3-4); exudate and soluble pigment absent; reverse yellowish grey to greyish yellow (4B2-4) or dull yellow (3B2-3). CYA, 5°C, 7 days: no germination. CYA, 37°C, 7 days: no germination. Conidiophores and conidia: conidiophores on MEA borne from superficial and aerial myce-lium; stipes septate, 126-300 × 2.4-4.3 μm, smooth, thick walled; penicilli terverticillate, occasionally quaterverticillate, irregular; rami in groups of 2-3, 6.3-16.7 × (2.4) 3.8-4.4 μm; smooth; metulae appressed, in verticils of 1-3, smooth, 8.7-10.0 × 2.0-3.2 μm; phialides in verticils of 3-7, ampulliform, smooth, 8.7-12.7 × 2.0-3.2 μm, collula abruptly tapering, short; conidia ellipsoidal, 2.0-3.5 × 2.0-2.4 μm; finely roughened, more or less, thick walled, borne in irregular columns.
 
 
 
 
 
　Specimens：

Taiwan, Ilan, from soil, Mar 1987.
 
 
 
　Habitat： from soil.
 
 
 
　Distribution：

Taiwan, UK, Puerto Rico.
 
 
 
　References：

Tzean, SS et al. 1994.
   
   
   
　Provided：

S. S. Tzean and S. C. Chiu
 
 
　Note： rare species, voucher culture CCRC 32049.