Phylloporia spathulata

Luciorobledo, Gerardo, Reck, Mateusarduvino, Góes-Neto, Aristóteles & Drechsler-Santos, Elisandro Ricardo, 2016, Phylloporia spathulata sensu stricto and two new South American stipitate species of Phylloporia (Hymenochaetaceae), Phytotaxa 257 (2), pp. 133-148 : 139-140

Phylloporia spathulata sensu stricto (Hook.) Ryvarden (1991: 196) ( Figures 2 A , 3 A–C )

Mycobank:—MB460305

Diagnosis:—Basidiomata seasonal, laterally stipitate, pileus dull, dark yellowish brown, azonate, pileal surface tomentose, 7–9 pores/mm, basidiospores elongate to cylindrical in equatorial lateral view, of 3–4 × 2–2.5 μm (avg. 3.0 × 1.9 μm).

Description:—Basidiomata seasonal, eccentric to laterally stipitate, solitary with concrescent pilei; pileus spathulate to reniform, applanate to convex, up to 0.7 x 0.7 cm and 1 mm thick; pileus surface as a tomentum, appearing adpressed velutinate, mostly dull, concentrically sulcate, without black striations, mostly azonate, dark yellowish brown (10 YR 4/4–4/6), 0.7 × 0.6 cm, up to 0.3 mm thick, separated from the context by a resinous and very thin dark line (up to 0.1 mm); context compact, slightly lighter in color than the superior portion, up to 0.3 mm thick; tube layer yellowish brown (10 YR 5/4–5/6), up to 0.4 mm; margin rounded, entire, up to 1 mm thick, concolorous with the pileal surface, slightly lighter towards the hymenophore; hymenophore not decurrent, yellowish brown (10 YR 5/4–5/6), pores circular, dissepiment entire, slightly fimbriate, (6–)7–9 pores/mm. Stipe probably attached to living roots, cylindrical, slender, slightly flexuous to erect, tomentose, concolorous with the pileus, up to 2.5 cm length by 0.25 cm in diameter; stipe surface a tomentum, the same as the pileal surface in color and texture; stipe context the same as the pileus context in color and texture.

Hyphal structure monomitic (dimitic d1–d2 sensu Corner 1991). Generative hyphae simple-septate, slightly thick to thick-walled with wide lumen, alternately branched, almost hyaline to yellowish, darkening slightly in KOH, 1.5–3 μm wide, to thick-walled with narrow lumen (capilar), dark brownish in KOH, alternately branched, simple-septate, (3–)4–6(–7) μm wide, dominating in the tubes. Basidia 4-sterigmate, broadly clavate to clavate, hyaline to faintly yellow in KOH, up to 10 x 4 μm. Basidioles not seen. Cystidia not seen. Basidiospores ( Figure 3 A–C ) elongate to cylindrical in equatorial lateral view, often with one or more flattened sides, looking somewhat square or trapezoidal in equatorial adaxial view; smooth, pale yellow in KOH/lactophenol; thick-walled; 3–4 × 2–2.5 μm (avg. 3.0 × 1.9 μm), Q = 1.19–2.00, Q avg. = 1.62, IKI-.

Substrate and distribution:—Possibly on living root of unknown angiosperm; type locality Amazonian Phytogeographic Province, possibly neotropical in distribution.

Specimens examined:— ECUADOR. Province of Loja: elevation 1,060 m. a. s. l., approx. 3º 59’ S, 79º 12’ W, A. von Humboldt 246 (K! 19681, Holotype of Phylloporia spathulata ).

Other specimens examined:— MEXICO. Veracruz: elevation 5,610 m. a. s. l., approx. 22° 28’ N, 93° 36’ W, August 1854, Berkeley (K! 174177, Isotype of Phylloporia veracrucis ) ; UGANDA. Kabarole: Kibale National Park , approx. 0° 30’ 0” N, 30° 24’ 0” E, 26 th October 2002, Ipulet F 706 ( TAA!, holotype of Phylloporia minutispora ) .

Figures

FIGURE 2. A) P. spathulata (Holotype); B) P. elegans (Holotype); C) P. nodostipitata (FLOR 51154), on the upper-right corner, detail of P. nodostipitata pileus and stipe in section. Photographs by Gerardo L. Robledo (A, B) & Valéria F. Lopes (C).

FIGURE 3. Sporogram from the holotype of Phylloporia spathulata (K!19681), representing three variations of its basidiospores in equatorial and polar view, the dotted lines representing flattened sides (el = equatorial lateral view; ead = equatorial adaxial view; eab = equatorial abaxial view; dp = distal polar view and pp = proximal polar view). Drawings by Valéria Ferreira Lopes.