Search on : Taxa descriptions

 


   
Literature:
 
Page number:186 
Description type:Non-original description 
Description:Clavaria decurrens var. australis COKER (1923). Clav. U. S. & Can. p. 177.
--- Ramaria pusilla var. australis (CoxER) CORNER (1950). Ann. Bot. Mem. 1: 618.
-- Ramaria decurrem var. australis (Coy.ER) PETERSEN (1981). Biblioth. Mycol. 79: 127.
HOLOTYPE : NCU - herb. COKER, Chapel Hill, NC, 25. vii. 17, coll. COKER, no. 2769. Isotypes : FH, NY, NCU.
Fruitbodies up to 6 x 4 cm, repeatedly branched, broadly obovate to arbuscular in general outline, arising from a tangle of white, mealy, fragile rhizomorphic strands. S t i p e up to 15 x 9 mm, single and discrete or compound through juxtapositon and hyphal matting, white below, concolorous with branches above; flesh offwhite, slowly turning to flesh pink and then to brown on cutting or exposure. Major branches several, ascending irregularly but not erect, up to 4 mm thick, collapsing or shrinking on drying, light buffy yellow (COKER), between "chamois" and "buff-yellow" of Ridgway; secondary branches in 2-4 ranks, irregular (not dichotomous), concolorous with major branches; axils rounded to openly rounded; hymenium unilateral; internodes diminishing gradually; spice minute, awl-shaped, concolorous with major branches and remaining constant in color until old age, often blackening and crisping on drying. Taste bitter; odor none.
On thick deciduous leaf mold.
Hyphae of rhizomorphs of two types: 1) outer hyphae up to 3.5 µm diam, hyaline, thin- to slightly thick-walled (wall up to 0.7 µm thick) ; ampulliform clamps abundant, up to 12 µm broad, unorna mented, with wall up to 1 µm thick; and 2) inner hyphae usually refringent, golden yellow, with gloeoplerous contents often in discontinuous patterns.
Hyphae of stipe and major branch trama up to 8 V.m diam, thin-walled, clamped, hyaline, loosely parallel, not adherent; ampulliform clamps common, elongate-pyriform, smooth. Basidia 25-35 x 7-8.5 µm, clavate, clamped; sterigmata 4.
Spores 5.9-7.8 x 3.0-3.7 µm (E = 1.55-2.33; Em = 1.90; Lm = 6.63 µm), shortcylindrical, broadly lacrymiform or stoutly comma-shaped, roughened, yellow-ochre in prints; contents homo geneous or occasionally with one brownish guttule; wall thin (up to 0.2 µm); ornamentation of short (up to 0.4 [.m), sharp, conical spines sparsely scattered randomly over whole wall area.
Observations. - The taxon has been treated mostly by PETERSEN (1981), who included figures and electron micrographs of the type specimen. Little additional discussion is needed here.
COKER compared the taxon to three others, two of which were not congeneric and the third not consubgeneric. The species (and its varieties) belongs in Ramaria subg. Echinoramaria, within which it seems most similar to the European R. decurrens var. decurrens.
 
Taxon name: