Grown in moist chamber from bark of Pinus strobus collected from this location on the 30 December 2021
Small hyphomycetes. Colonies isolated on the bark of the host, Conidiophore consisting of a venter topped by a collarette. Venter appear rough, is enlarged and easily differentiated, paler than the collarette, and measure 30 - 70 x 12 - 15 µm. collarette much darker and slimmer and generally longer than the venter, measuring (60-)75 - 100 x 8 - 10.µm Conidiophore aseptate and its total length is 100 - 175 µm. Conidia produced inside the collarette and protruding at the top (a bit like smoke from a smokestack), often in long fragile chain several time longer than the conidiophore. Conidia are hyaline and generally 7 septate (rarely 6 or 8 septate), oblong with somewhat truncate ends or somewhat rectangular. Conidia measure (30-)38 - 48 x (6-)6.5 - 7.5(-8.5) µm (avg = 41.2 - 7.1).
The genus Chalara is relatively distinctive by produce hyaline truncate conidia inside an highly elongated, often dark, collarette.
This species was identified using the Key by Nag Raj and Kendrick (1975) as it fit almost perfectly all descriptions in the key. Chalara bicolor is very similar but produce conidia generally longer than 50µ and with a width less than 6.5µ. C. pulchra is also similar but lack a differentiated venter and have wider conidia at least 8.5µm in width. (Nag Raj and Hughe, 1974)
Nag Raj, T.R. and Hughes, S.J. (1974). New Zealand Fungi
- Chalara (Corda) Rabenhorst. New Zealand Journal of Botany 12: 115 - 129
Nag Raj, T.R. and Kendrick, B. (1975). A Monograph of Chalara and Allied Genera.
