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Page number:126 
Description type:Non-original description 
Description:Ramaria rasilispora [var. rasilispora] Marr and Stuntz. 1973. Biblioth. Mycol. 38: 107.
Fruitbodies (Fig. 13) up to 15 x 22 cm, circular to depressed-ellipsoid in outline, usually emergent from substrate but often semiemergent. Stipe up to 7 x 4 cm, usually smaller, single, obtusely rounded at base, usually wider than high, white, minutely tomentose between substrate particles, not brunnescent, commonly with abortive branchlets in the form of blunt or tapering stumps; flesh white, solid, usually mottled with watery spots, drying whitish, moderately hard. Major branches 2-4, ascending but not erect, more or less terete. Branches in 4-6 ranks, crowded when young, lengthening to rather open by maturity, more or less terete, pale ochraceous yellow ("pale ochraceous salmon," "warm buff," "cream color") to fleshy buff (4A2, 5-6A4-5); internodes diminishing gradually at maturity; axils rounded, often splitting; flesh white, homogeneous. Apices crowded when young, dentate to irregularly coarse at all ages, light yellow ("pinard yellow") to pastel chartreuse yellow ("amber yellow," "empire yellow," "wax yellow," "barium yellow," 2A3, 2-5A4-5), often blushing to "onion skin pink" where exposed to cold, dry air. Odor very weakly aromatic; taste negligible to weakly bitter.
Fruiting on soil and duff in mixed coniferous forests, including Pinus monticola, Pseudotsuga menziesii, and Abies grandis; throughout the range.
Macrochemical reactions: FSW, FCL = positive; IKI = slowly and weakly positive ("old gold"); PHN = rarely slowly positive; ANO, ANW, PYR, KOH, NOH, PDAB = negative
Stipe tramal hyphae 10-33 µm diam, hyaline, clamped, not agglutinated or adherent, thick-walled (wall up to 4 µm thick), tightly interwoven; ampulliform inflations hardly swollen, usually thick-walled (wall up to 3 µm thick), with extensive and coarse stalactitiform ornamention; gloeoplerous hyphae occasional, 3-12 µm diam, yellowrefringent, strongly cyanophilous. Tramal hyphae of upper branches up to 17 µm diam, hyaline, clamped, thin- to locally thick-walled (wall up to 1.5 µm thick), parallel, free inward, adherent beneath hymenium; ampulliform inflations and gloeoplerous hyphae not observed. Subhymenium rudimentary. Hymenium thickening; basidia 50-60 x 7-8 M, clavate, clamped; contents homogeneous; sterigmata 4, slender, sublyriform.
Spores (Fig. 14) 8.3-11.5 x 3.6-4.3 pin (E = 2.30-3.00; Em = 2.57; Lm = 9.95 Gun), cylindrical, occasionally subboletoid (swollen adaxially), smooth (at x1000); wall up to 0.2 µm thick; content 1-several-guttulate, the guttules amorphous, dark, non-refringent; ornamentation none or a very few slender meandering ridges.
Commentary: This is the most commonly collected taxon in many parts of the Pacific Northwest, and is eaten routinely by many people.
The only sure way to separate R. rasilispora from R. magnipes in the dried condition is spore length. Spores of R. magnipes are considerably longer (Lm = 11.7) than those of R. rasilispora (Lm = 9.95 Glm). When fresh, upper branches and apices of R. magnipes are more intensely colored than those of R. rasilispora. Stipe surfaces in R. magnipes are easily brunnescent, while those in R. rasilispora are not so. In those herbarium specimens which we have examined, fruitbodies of R. magnipes dry darker, dingier, with harder, darker stipe flesh, whereas those of R. rasilispora are cream colored, with white flesh even when dry. Likewise, while our sampling is anything but exhaustive, dried specimens of R. magnipes seem always to be stocky, stout, with larger stipes and shorter branching patterns. Those of R. rasilispora var. rasilispora are usually much more open, with long lower branches and moderate-sized stipe. As stated under var. scatesiana, the two varieties of R. rasilispora are distinguished only with great difficulty in the dried condition, but when fresh, fruitbody branches of var. rasilispora are considerably more flesh-colored and apices brighter and deeper yellow than those of var. scatesiana.
Marr (in Marr and Stuntz, 1973) conjectured that R. magnipes and R. rasilispora belonged to a complex including R. obtusissima (Peck) Corner from eastern North America. Based on spore size and shape, and the very sparse ornamentation configuration in R. obtusissima, I (RHP) concluded (Petersen, 1986) that R. obtusissima belonged in subgenus Ramaria along with R. botrytis, R. holorubella, R. strasseri and others with striate spore ornamentation. To be sure, jonquil yellow coloration was anomalous in that subgenus, in which the nearest colors are tan to fleshy tan (in R. strasseri and similar taxa). Furthermore, Schild (1982) has described R. gypsea and Petersen (1988) has proposed R. schildii, both smooth-spored from Europe. While both seem clearly to belong in subgenus Laeticolora, they represent different species alliances. While smooth-spored taxa might be expected in both subgenera, when auxiliary characters are used it seems increasingly probable that R. obtusissima can be placed in subg. Laeticolora.
For more discussion, see under R. magnipes.
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