Search on : Taxa descriptions

 


   
Literature:
 
Page number:761 
Remarks (public):Observations on fruit body development.-Basidiocarps formed 50 days after inoculation in cultures [using Brodie's (1948) medium or 2% malt extract] kept in light and in those exposed weekly to light.
Most basidiocarps progressed through the following color sequence : Naples Yellow, Straw Yellow, Vinaceous-Buff, Pinkish Buff, Wood Brown with Tilleul Buff tips, Snuff Brown with Light Pinkish Cinnamon tips, Olive-Brown with lighter tips, completely Natal Brown, completely Tawny to Russet. Basidiocarps formed later in the same culture flask were Pinkish Buff initially, never yellow, and became darker with age.
Fruit bodies formed in culture with daily light began as unbranched, often cespitose (1-3 in group) or solitary stalks with cup-shaped, coronate apices. Later 2-4 secondary branches developed from the apex or from an area immediately below the apex. Occasionally tertiary branches were similarly formed. If the culture was directly below the light source, coronate apices and pyxidate branching occurred. If cultures were to one side of the light source, however, fruit bodies displayed positive phototropism, growing towards the light. Fruit bodies in the latter situation did not have cup-shaped apices or pyxidate branching. Negative geotropism was observed in basidiocarps developing in dark inverted flasks.
These observations show how easily basidiocarps of Clavicorona pyxidata could vary with age and in different microhabitats. This is especially pertinent to the taxonomy of this species since color, branching and cespitose habit were formerly used to differentiate species (Clavicorona coronata and Clavaria petersii).
 
Description type:Culture description 
Description:Mat slow-growing, 9 cm in diam after weeks; texture farinaceous, slightly cottony; white with yellow and white felty patches; azonate; marginal hyphae submerged, more or less fim-briate; odor distinctive, like old lemon; oxidase reaction positive (shown
by staining with tannic acid and gum guaiac); tetrapolar type of interfertility.
Hyphae (1.0-) 3.0 11.0 (-6.5) µm wide, thin-walled, clamped (except in single-spore isolates), either hyaline or with oil droplets; if in felty mat, then much branched, interlocking, with short broad branches (2 µm wide) or very narrow (less than 1.0 µm wide) longer branches, occasionally swollen. Gloeoplerous hyphae 3-6 µm wide, intercalary or short and terminal; contents staining black in sulfobenzaldehyde. Chlamydospores 6-10 µm in diam, spherical, laterally attached to hyphae by pedicels 10-13 µm long (Fig. 3) . Nobles (1965) Key Code : 2, 3, 11, 15, 26, 34, 36, 41 '5, (48), 53, 54, 55, 60.
 
Taxon name: