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 Pleurotus parsonsiae
SynonymsPleurotus flabellatus
Agaricus flabellatus
Pleurotus salignus
Agaricus salignus
Pleurotus applicatus
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge)
Caption: 112-Pleurotits flabellatus: a. (coll. New Zealand) spores; b. (type)
spores. |  |  | 
Caption: 287-Pleurotus sp. [Pleurotus salignus]: a. spores. | |
Article: Segedin, B.P.; Buchanan, P.K.; Wilkie, J.P. (1995). Studies in the Agaricales of New Zealand: new species, new records and renamed species of Pleurotus (Pleurotaceae). Australian Systematic Botany 8: 453-482.
Description: Description of HolotypeStevenson (1964) described this species as follows' Pileus 7-12 cm diam., creamy fawn, orbicular with margin
down-rolled at first and later splitting, smooth, dull, pellicle peeling; flesh
creamy white. Gills decurrent to deeply decurrent, creamy, moderately crowded,
thin, deep, margins becoming lacerate. Stipe 8 X 8 mm., to 1X 1.5 cm., lateral.
Spores 9-11 X 4—4.5 µm., non-amyloid, thin-walled. Hymenophoral trama subregular
with some thick-walled hyphae. Cuticle of mainly parallel or loosely woven hyphae
with clamp-connections.'
additional text on holotype missing
Description of additional NZ collection
Basidiomes solitary or sometimes somewhat imbricate; pileus 30-150 X 40-150
mm, spathulate to flabelliform, sometimes excentrically stipitate, ochraceous
(6C5-6B4, K & W), pale yellow brown, darker when wet or grey yellow (4C3,
K & W), darker towards margin, paler towards stipe, drying ochraceous, dry,
smooth, matt to finely fibrillose, sometimes faintly pellucid striate at margin;
margin plane, cracking radially. Lamellae decurrent, white to grey becoming
yellow, broad, relatively thin, crowded, in three series. In most dried material,
lamellae becoming encrusted at edges. Stipe short and fat or almost indistinguishable,
lateral to excentric, 20 X 20 mm, concolorous with pileus, some lamellae running
almost to base, not anastomosing, sometimes slightly tomentose at base. Flesh
cream, thin. Taste pleasant, smell slightly mealy or woody. Spore print white,
becoming cream.
Spores 7-12 X 3.5-5 (9.2 X 4.1) µm, Q = 2.3, oblong to cylindrical, hyaline,
smooth, inamyloid and not dextrinoid. Basidia 22-30 X 5-6 µm, clavate, with
four sterigmata, not surviving well in dried material. Cheilocystidia 12-17
X 4-6 µm, basically oblong-clavate with a mucronate tip, occasionally bifurcating
at tip, hyaline, thin-walled, forming a distinct layer at lamellar margin but
not extending back over lamellar face. Pleurocystidia seen in only one collection
(PDD 59218), 40 x 4 µm, cylindrical, with a septum near base. Trama of roughly
parallel hyphae following a wavy pattern, thin-walled, 3-6 µm in diameter, with
conspicuous, almost medallion clamp connections; occasional oleiferous hyphae
present, but not invariably. Subhymenium well developed, 35 µm wide, sub-cellular,
with spaces between. Context a very loosely interwoven network of hyphae 4-6
µm in diameter, with very conspicuous clamp connections and some thickening
of walls (sclerified generative hyphae of Hilber 1982), some with thick-walled
tapering ends. A well developed system of oleiferous hyphae, very irregular
in shape, 2-9 µm in diameter, very contorted, and with yellowish oily contents,
particularly abundant just below pileipellis in one collection (PDD 59217).
Pileipellis a layer of thin-walled, faintly yellow repent hyphae. Some emergent
hyphae, both thin- and thickish-walled (but not encrusted), sometimes seen on
surface.
Habitat: On dead wood of Sophora sp. (holotype), Leptospermum scoparium. Eucalyptus
sp., Cordyline australis, in forest of indigenous and introduced trees.
All collections are of one or at most two basidiomes, suggesting that the fungus
is not gregarious.
Article: Stevenson, G. (1964). The Agaricales of New Zealand: V. Kew Bulletin 19(1): 1-59.
Description: Pileus 7-12 cm diam., creamy fawn, orbicular with margin down-rolled at first and later splitting, smooth, dull, pellicle peeling; flesh creamy white. Gills decurrent to deeply decurrent, creamy, moderately crowded, thin, deep, margins becoming lacerate. Stipe 8 x 8 mm, to 1 x 1.5 cm, lateral. Spores 9-11 x 4-4.5µm, non-amyloid, thin-walled. (Fig. 8). Hymenophoral trama subregular with some thick-walled hyphae. Cuticle of mainly parallel or loosely woven thin-walled hyphae with clamp connections.
Habitat: On fallen wood, Dunedin, 14.12.1947, W. Stevenson; & Levin, 20.11.1948, E. Parsons in Stevenson (type).
Notes: Though this species resembles P. laciniatocrenatus (Speg) Speg. which is discussed by Singer (1950) this writer considers it to be distinct.
Other Pleurotus spp. recorded from New Zealand by Massee (1898) have not been collected by the writer. As the identifications are in doubt the records need confirmation.
Article: Massee, G.E. (1899) [1898]. The fungus flora of New Zealand. Transactions and Proceedings of the New Zealand Institute 31: 282–349 Wellington:.
Description: Pileus horizontal, often imbricated, thin and soft, white or more or less tinged reddish-brown,
tomentose or downy, becoming glabrous, gradually narrowed behind into a somewhat slender
stem-like base, and truly fan-shaped, margin sometimes irregularly lobed, 2-5 cm. long, 2-3
cm. broad; gills radiating from the narrowed base, decurrent, narrow, somewhat crowded,'
margin entire; spores narrowly elliptical, and obliquely apiculate, 5-6 x 3.5 µ; cystidia
fusiform, apex rather acute, and rough with particles of oxalate of lime.
Habitat: On dead wood.
Distribution: Dannevirke, New Zealand. Ceylon, Australia, South Africa, Venezuela.
Notes: Distinguished from Pleurotus colensoi and P. guilfoylei by the truly fan-shaped pileus,
smaller spores, and the presence of large cystidia in the hymenium, which have the projecting
portion covered with particles of oxalate of lime, as in Peniophora.
Article: Horak, E. (1971). A contribution towards the revision of the Agaricales (Fungi) from New Zealand. New Zealand Journal of Botany 9(3): 403-462 (http://www.rsnz.org/publish/abstracts.php).
Notes: Fig. 10 The New Zealand collection (COLENSO b 652) differs in several features
from the type (fig. 112 b), originally described from Ceylon. The most striking
difference is in spore size: 6.5-8.5 X 3-3.5 µ (type), 8.5-11.5 X 4-4.5 µ (N.Z.
specimen).
Article: Massee, G.E. (1899) [1898]. The fungus flora of New Zealand. Transactions and Proceedings of the New Zealand Institute 31: 282–349 Wellington:.
Description: Pileus horizontal, at length depressed and strigose behind, margin entire, incurved, pale
yellowish-brown or dusky, 5-10 cm. across; gills horizontal, not distinctly decurrent, 3-6 mm.
broad, distinct behind, branched midway between base and front, crowded, pale, dingy;
margin often broken; spores dingy, elliptic-oblong, slightly curved, 8-10 x 3-5 µ; stem always
very short, firm, downy or strigose.
Habitat: On rotten trunks, stumps, &c.
Distribution: Dannevirke, New Zealand. Australia, Europe, United States.
Notes: Not caespitose. Readily distinguished by the pileus being pulvinate when young, then
becoming depressed and strigose, gills thinner and more crowded than usual in the genus,
somewhat branching, not anastomosing behind dingy smoke-colour, as are also the spores
(Fries).
Article: Horak, E. (1971). A contribution towards the revision of the Agaricales (Fungi) from New Zealand. New Zealand Journal of Botany 9(3): 403-462 (http://www.rsnz.org/publish/abstracts.php).
Description: Pleurotus salignus (Persoon) (8,16) Fig. 24 = Pleurotus sp.
The cylindrical spores of this collection (COLENSO b 876) are distinctly smaller
(7-9 X 3-3.5 µ) than those of typical P. salignus. At the same time all characters
of this species differ from those of other Pleurotus species hitherto found in New
Zealand.
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