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Page number:11 
Description type:Non-original description 
Description:Clavulinopsis umbrinella (Saccardo) Corner, Ann. Bot. Mem. 1: 393-394. 1950. PL 1 B; Figs 5-11. Clavaria umbrinella Saccardo, Sylloge Fungorum 6: 695. 1888.
Clavaria umbrina Berkeley, Outlines of British Fungology p. 279; pl. 18, f 4. 1860 (non Leveille, 1846).
= Clavaria cineroides Atkinson, Ann. Mycol. 7: 367. 1909.
Clavulinopsis cineroides (Atk.) Corner, Ann. Bot. Mem. 1: 360-361. 1950.
ILLUSTRATIONS: Berkeley, M. J. (1860-pl 18, Fig 4); Coker (1923-pl 20, 83, Figs 8-11, pl 92, Figs 9, 10).
Fruiting bodies branched, up to 5 cm high; stem portion white or whitish, hispid to tomentose toward the base, 2-5 mm thick, usually channelled; branches smooth, usually somewhat longitudinally ridged, white, pale fuscous to watery brown or drab with olive or brownish tints, ascending, somewhat expanded above into digitate apices; branching about 1/2 to 2/3 from the base, not at ground level; pigmentation residing in vacuoles in the hymenial and subhymenial hyphae. Odor none; taste penetratingly bitter. Hymenium dark green in FeSO4 + ETOH, bright blue in G + H2O and G + ETOH, soaked-orange in KOH, bleaching in sulfoformol. Scattered to gregarious, in deciduous or mixed woods.
Contextual hyphae of two types: (a) loosely interwoven but generally parallel, slightly inflated up to 12 µm diam, occasionally slightly thick-walled, hyaline, bearing a clamp connection at each septum, interwoven with (b) narrow (up to 3 µm diam), long-celled, hyaline hyphae. Subhymenial hyphae narrow, tortuous, clamped, pigmented watery tan in some specimens. Basidia 50-110 x 4-8 µm , elongateclavate, attenuate, clamped, 4- (rarely 2-) sterigmate; sterigmata 4-8 µm long, stout, straight and slightly divergent; basidial contents heterogeneous, weakly pigmented (Figs 5-9).
Spores (5.2-)5.6-7.9(-10.5) x 5.6-7(-9.0) µm, globose to subglobose, strongly apiculate, smooth, uniguttulate to granular, thin-walled to slightly thick-walled (Fig 10).
It would appear that most of the specimens of fungi which macroscopically resemble C. corniculata except in color have been placed under the synonymous names. The fruiting bodies of C. umbrinella have been noted as white (RHP 1447), ivory white (Coker, 1947), pale gray (Coker, 1923, 1947), pale umber (RHP 1309), and uniformly gray or cinereous (Atkinson). Although varying in color, the two fresh specimens I have collected have two points in common with the type, which I believe makes them all conspecific: (1) the hymenium turns bright blue in guaiac, and (2) the basidia are much longer than those of any other species. In addition, they possess spores of the same dimensions and shape, but these dimensions are not unusual in Clavulinopsis.
I consider C. umbrinella to be part of a color series from C. corniculata, just as C. aurantio-cinnabarina and its form amoena and C. laeticolor and C. corallinorosacea also form color series.
I have seen the type specimen of Clavaria umbrinella (Clavaria umbrina Berkeley at K), and I agree with Coker (1923), who reported that the spores and basidia of the type are quite close to those of C. corniculata (C. muscoides of Coker). However, the colors of C. cineroides (gray, drab or fuscous) and C. umbrinella (pale umber) are not at all like those of C. comiculata (bright yellow-ochre). Schweinitz's (1832) description of C. sulphurascens may be of C. umbrinella, but no type specimen remains.
Although the species is collected rarely, its distribution includes North America and Europe.
Specimens examined: as Clavaria umbrinella: CGE-Corner (England, U.S.A.; England-as C. subtilis); RHP-1306 (N.C.), 1447 (Term.). as C. cineroides: CUP-Atkinson (holotype!), Chapel Hill (N.C.); F-Calif.; KRS-Nova Scotia; NY-Coker (N.C.); BPI-Hibbard (Mass., Vt.).; as C. umbrina: K-Berkeley (holotype!); NY-Coker.
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