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Description type:Original description 
Description:Ramaria leptoformosa sp. nov. (Pl. VI Fig. 34, Pl. XV Fig. 69)
Basidiocarp: Habitat: terrestrial, growing under Douglas Firs, Western Yews and Western Hemlocks. Color: underground portion of fresh fruiting body "yellowish or orange white" (4-5A2), bruising or staining reactions slight or entirely absent, branches "light orange or light red" (6-7A4-7), apices more yellowish "sunflower or dark yellow" (4A7-8) or "chrome orange" (5A7-8), context concolorous with surface. Base of dried specimens "pale yellow" (4A3), commonly with spots between "maize yellow" (4A6) and "golden yellow" (5B7), branches and apices drying a shade browner than "light yellow" (4A4), or slightly paler than "grayish orange" (5B5), context brownish white, white or "maize yellow" (4A6). Taste: not distinctive. Odor-slight, not distinctive. Form: basidiocarps usually of medium size, taller than broad, 4.5-17 x 2-10 cm. Base 0.5-5 x 1-4 cm, single or more corarnonly compound, the compound base consisting of 2-10 axes in various stages of connation, each component about 0.8-2 cm diam, sometimes slightly bulbous, up to 9 cm in length, small basal abortive or primordial branch systems sometimes present; branching up to 7 times from the base, commonly polychotomous in the lower nodes and dichotomous above, axils acute to u-shaped and branches slightly divergent, mature internodes usually elongated, up to 4 cm long, branches slender, seldom over l cm diam, commonly 2-5 mm diam, forked to finely divided near apices, apices subacute. Consistency: fleshy-fibrous when fresh, drying brittle and with distinct chalky-friable properties.
Macrochemical Reactions: Context of stipe non-amyloid; positive color changes occurring within 30 min of application to branch sections of a-napthol, guaiac, guaiacol, phenol and aniline, the a-napthol reaction sometimes weak, and occasionally pyrogallol" reacting with the hymenium.
Microscopic structures: Sporas: average 10.6 x 4.1 µm, range 8-13 x 3-5 µm, subcylindrical with a suprahilar depression and slight dorsal convexity, finely ornamented with linearly lobed, cyanophilous warts, spores in deposit "golden yellow" (5B7). Hymenium: basidia clavate, 41-80 x 8-12 µm, basally clamped, 1-4sterigmate, mostly 4; sterigmata mostly straight, not divergent or slightly so; hymentum approx 70-80 µm thick and the subhymenium 25 µm thick. Subhymenial hyphae-loosely interwoven, 2-4 µm diam, clamped, thin-walled. Contextual hyphae: outer hyphae of the stipe collapsing and forming- a densely stratified parallel "tissue," toward the interior progressively more subparallel and finally interwoven, parallel in the branches, cells non-inflated or slightly inflated, 2-14 µm diam, walls smooth or fluted, moderately cyanophilous, thin-walled, ampulliform inflations near septa ,infrequent, 9-15 µm diam, walls of the swellings nearly smooth in the branches, moderately ornamented in the stipe; clamps present, closed or open, the clamp cell sometimes enlarged up to 9 µm diam; gleoplerous hyphae present, 3-3.5 µm diam except in localized bulbous regions.
Discussion: Ramaria leptoformosa is a non-bruising species which is otherwise similar to R. formosa in form and color. As the name implies, the fruiting bodies are more slender than those of R. formosa. It is definitively separated
from R. formosa by the smaller average spore width, 4.1 µm compared to 5.4 µm, and the absence of cyanogranular protoplasm which typically occurs in the basidia of R. formosa. Other species with clamped hyphae that might possibly be mistaken with R. leptoformosa are: R. amyloidea, R. maculatipes, R. rubricarnata, and R. sandaracina var. euosma. The first three species, in contrast to R. leptoformosa, are amyloid-positive, and the last species has much smaller spores and subgelatinous consistency.
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