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Nectria peristomialis (Berk. & Broome) Samuels 1976

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Nectria peristomialis (Berk. & Broome) Samuels, New Zealand J. Bot. 14 251 (1976)

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(Berk. & Broome) Samuels
Berk. & Broome
Samuels
1976
251
ICN
species
Nectria peristomialis

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peristomialis

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Nectria peristomialis (Berk. & Broome) Samuels 1976

ADDITIONAL SPECIMENS EXAMINED: NEW ZEALAND: Auckland Province. Manukau County, c. 3 miles S of Kawakawa Bay, vic. Papakauri Hill, on decortcated wood of Suttonia sp., Samuels 73-80 & Dingley, 23 May 1973 (PDD 31817) ; Rodney County, Atuanui State Forest, vic. Glorit, on rachis of Cyathea dealbata, Samuels 73-314, 17 Nov. 1973, (PDD 32567) ; Thames County, Coromandel Forest Park, Kauaeranga Valley, vic. Thames, on decaying leaf of Freycinetia banksii, Dingley et al., 27 Aug. 1974 (PDD 32586, Samuels 74-112), Samulae 74-113 (PDD 32587) ; Waitemata County, Waitakere Ranges, Fairy Falls Track, on dead leaves of Freycinetia sp., Dingley et al., 14 Feb. 1974 (PDD 32473); vic. Piha, Marowhara Loop Track, on leaf of Rhopalostylis sapida, Samuels 73-140, 19 Jul. 1973 (PDD 32550); vic. Waiatarua, Nature Track, on rachis of Cyathea medullaris, Samuels 74-10, 1 Mar. 1974 (PDD 32588); Whatipu Rd, track to summit of Mt Donald McLean, on rachis of Cyathea medullaris, Samuels 74-39 & Kendrick, 5 Apr. 1974, (PDD 32581) ; Whatipu Rd, Destruction Gully Track, on dead leaf of Astelia sp., Samuels 74-38 & Kendrick, 4 Apr. 1974 (PDD 32580). BRAZIL: Rio Grande do Sul, on culms of bamboo, Malme 340, 7 Apr. 1893 (S, HOLOTYPE Ijuhya vitrea); Sao Paulo, Bella Vista, on bamboo, Aug. 1901 (FH, herb. Hohnel, sheet no. 5702, as Ijuhya vitrea). JAVA: Tjibodas, on bamboo, 1907-8 (FH, herb. Hohnel, sheet no. 5792; HOLOTYPE Ijuhya vitrea var. javanica).

CONIDIAL STATE: Acremonium sp.

Mycelium white or not visible. sparse, and growing away from the perithecia. Perithecia solitary or in groups of 2-4, hyaline with orange contents, globose, 200-370 µm diam., with an apical, stellate crown of hairs, not collapsing when dry, not changing colour in 3% potassium hydroxide. Perithecial wall 30-40 µm thick. Surface view; cells prosenchymatous, walls 1-2 µm thick. Longitudinal section: outer region 10-20 µm wide, cells prosenchymatous, walls of cells 1-2 µm thick; inner region 15-20 µm wide, cells ellipsoidal, 3-7 µm long, walls 1-2 µm thick; cells becoming progressively more flattened toward the interior, merging with the cells of the prosenchymatous layer at the exterior. Perithecial hairs fasciculate, forming a stel.late apical disc or less frequently triangular and scattered, white, up to 200 µm long, 60-80 µm basally; composed of unbranched, septate, tightly bound, hyphae, c. 3 µm wide with walls c. 1 µm thick; arising from the prosenchymatous region of the outer perithecial wall. Perithecial papilla lacking, ostiolar opening formed by narrow hyphal elements arising from the inner region of the perithecial wall; ostiolar canal periph ysate. Asci clavate, (52-) 70-85 (-105) x (8-) 9-13 (-15) µm, 8-spored; apices rounded, simple; bases rounded; ascospores biseriate, forming throughout the length. Ascospores fusiform, (18-) 25-32 (-37) x (3-) 4-6 (-7) µm. 1-2 (-5) septate; coarse striations ridge-like and frequently forming a blunt apiculus at the ends of the ascospores; not constricted or cells separating at the median septum, hyaline.

CHARACTERISTICS IN CULTURE CMD: Ascospores germinating overnight; a single, long, unbranched germ tube arising from each end of each ascospore. Colonies 1 cm diam., opaque, white to pale pink; aerial mycelium lacking or as hyphal, rope-like strands; non-aromatic, medium non-pigmented. ME: Less than 1 cm diam., opaque, white to pink; aerial mycelium sparse to lacking or as hyphal, rope-like strands; margin undulate, non-aromatic, medium non-pigmented. OA: 1-2 cm diam., opaque, white to pale pink; aerial mycelium as hyphal, rope-like strands arising in concentric rings around the inoculum; non-aromatic, medium non-pigmented. WAS: 2 cm diam., transparent, grey, aerial mycelium sparse, margin undulate, non-aromatic, medium non-pigmented. Phialophores forming only on WAS, arising from the surface of the straw and from the aerial mycelium; monophialidic, unbranched, 0-2 septate, straight, smooth, (19-) 22-47 (-60) µm long, 2-3.5 µm basally, subtending hypha 2-3.5 µm wide. A solitary phialide constituting the terminal (7-) 23-33 µm of each phialophore, 1-1.5 µm wide at the unflared tip. Conidial production sparse. Phialoconidia ellipsoidal to nearly cylindrical. (4-) 5-7 (-8) x 2-2.5 µm, unicellular, hyaline, without a basal abscission scar. Arising in basipetal succession and held in a solitary, hyaline drop of liquid.

HABITAT: On decaying herbaceous debris and wood.
NOTES: Nectria peristomialis differs from N. dentifera in its much longer. coarsely striate ascospores. When the perithecial hairs of N. sylvana are in the form of an apical disc, it resembles N. peristomialis, but the two species are readily distinguished by their ascospores. The orange perithecial contents are also characteristic of N. peristomialis.
The apical fringe of hairs gives the perithecia `an apothecial aspect, thus explaining why the species has been treated as a discomycete.
HOLOTYPE: ENGLAND: Penzance, on Ilex sp., no. 248 (K!).

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Nectria peristomialis (Berk. & Broome) Samuels 1976
Nectria peristomialis (Berk. & Broome) Samuels (1976)
Nectria peristomialis (Berk. & Broome) Samuels 1976
Nectria peristomialis (Berk. & Broome) Samuels (1976)

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Nectria peristomialis (Berk. & Broome) Samuels 1976
[Not available]

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1cb195cf-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
12 November 1999
15 November 1999
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