Xylaria palmicola G. Winter 1887
Details
Xylaria palmicola G. Winter, Grevillea 15 89 (1887)
Nomenclature
G. Winter
G. Winter
1887
89
ICN
Xylaria palmicola G. Winter 1887
Brazil
species
Xylaria palmicola
Classification
Associations
Descriptions
Xylaria palmicola G. Winter 1887
SPECIMENS EXAMINED: (all on seed of Rhopalostylis sapida Wendl. & Drude): NORTHLAND: Bay of Islands County, Puketi State Forest, picnic area along Waipapa River, Samuels (82-120) & Johnston, 16 Apr. 1982 (PDD 44333). AUCKLAND: Waitemata City, Waitakere Ranges, Cascades, Samuels (81-349) et al., 14 Aug. 1981 (PDD 45691); Waitakere Ranges, Titirangi Beach Reserve, Samuels (82-13) & Hennebert, 27 Feb. 1982 (PDD 44267).
Stromata solitary or gregarious, 2.5-4.5 cm long, unbranched with apex attenuated and acute or enlarged and palmate. Fertile portion subapical, cylindrical, 1-2 cm long x 2.0-2.5 mm diam.; stipe sharply delimited from the fertile portion, 1-2 cm long x 1.0-1.5 mm diam., with a velutinous coat of short, reddish hyphae. Stromal surface with brown tissue cracking longitudinally, slightly tuberculate from perithecia) elevations; perithecia almost completely immersed, 300-400 µm diam., ostioles difficult to see. Internal tissue of stroma white, solid. Asci 130-140 µm total length x 5-6(-7) µm, sporiferous part (65-)74-87 (-90) µm, cylindrical; 8-spored, apical ring cylindrical, J+, 2 µm high x 2-3 µm wide; ascospores uniseriate with overlapping ends. Ascospores (8-)10-13(-16) x (4.5-)5.0-6.0(6.5) µm, inequilateral with one side straight and the other curved; in top view elliptical to naviculate with one end attenuated; transparent brown; slit full length or nearly so, parallel to the long axis of the ascospore.
CHARACTERISTICS IN CULTURE: Colonies grown two weeks at 20°C in diffuse daylight on OA 4.5 cm diam.; mycelium flat, white but with a blue-green ring around the centre, incipient stromata sometimes forming in the centre of the colony; with a rose-coloured pigment spreading into the medium; surface of colony eventually becoming dark olivaceous and velvety; stromata forming within one month, erect, 2-3 cm long x 2 mm diam. at base, branched, clothed in green hyphae; tip acute, white, conidiogenous. Conidiophores arising from aerial hyphae along upper half of the stroma, loosely dispersed and not forming a distinct palisade, unbranched, 25-55 µm long x 2-3 µm wide at base, straight, smooth, hyaline; producing a small number of conidia at the tip, a minute denticle remaining after conidial dehiscence. Conidia (4.0-)4.5-6.5(-8.0) x 2.0-2.5(-3.0) µm, ellipsoidal, with a protuberant, flattened, weakly refractive basal abscission scar.
CHARACTERISTICS IN CULTURE: Colonies grown two weeks at 20°C in diffuse daylight on OA 4.5 cm diam.; mycelium flat, white but with a blue-green ring around the centre, incipient stromata sometimes forming in the centre of the colony; with a rose-coloured pigment spreading into the medium; surface of colony eventually becoming dark olivaceous and velvety; stromata forming within one month, erect, 2-3 cm long x 2 mm diam. at base, branched, clothed in green hyphae; tip acute, white, conidiogenous. Conidiophores arising from aerial hyphae along upper half of the stroma, loosely dispersed and not forming a distinct palisade, unbranched, 25-55 µm long x 2-3 µm wide at base, straight, smooth, hyaline; producing a small number of conidia at the tip, a minute denticle remaining after conidial dehiscence. Conidia (4.0-)4.5-6.5(-8.0) x 2.0-2.5(-3.0) µm, ellipsoidal, with a protuberant, flattened, weakly refractive basal abscission scar.
DISTRIBUTION: NORTH ISLAND: Northland, Auckland.
HABITAT: Monocotyledonous trees.
NOTES: Our concept of X. palmicolais that of Dennis (1956). The fungus described here differs from his description in its somewhat smaller ascospores.
Taxonomic concepts
Xylaria palmicola G. Winter 1887
Xylaria palmicola G. Winter (1887)
Xylaria palmicola G. Winter 1887
Xylaria palmicola G. Winter (1887)
Xylaria palmicola G. Winter 1887
Xylaria palmicola G. Winter (1887)
Xylaria palmicola G. Winter 1887
Xylaria palmicola G. Winter (1887)
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Identification keys
Metadata
1cb1abf1-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2001
30 September 2024