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Description type:Original description 
Description:Ramaria brunneipes Petersen et Zang, sp. nov. Figs. 4, 5
Fruitbodies (Fig. 4) up to 20 x 13 cm, massive, circular to broadly obovate in outline. Stipe up to 4 x 4 cm, small to large, rounded to tapering sharply to acute or rooting base, smooth, with a few abortive stumps high on stipe or low on lower branches, off-white, very easily brunnescent ("snuff brown") ; flesh offwhite ("pale ochraceous buff"), slowly brown when cut, solid, mottled-hygrophanous but not gelatinous or slippery, often with a yellowish band suffused near base, dry flesh firm but easily penetrated. Major branches 2-4 , massive, hardly terete, ascending, yellow to greenish yellow when young or fresh ("pinard yellow," "buff yellow"), easily mellowing to pastel yellow-ochre through development ("light ochraceous buff," dull "orange buff"); flesh white, solid, not hygrophanous. Branches in 3-6 ranks, stout, ascending, sometimes somewhat divergent, concolorous with upper major branches; internodes all short when young, giving a squat, stout appearance, elongating below through development, diminishing gradually at maturity; axils rounded throughout. Apices sometimes finely divided, acute, doubledichotomous, usually gross, molar-like, short-digitate at maturity, bright yellow to ochraceous yellow ("antimony yellow," "pinard yellow"), off-white where protected ("light buff"). Odor negligible or faintly fragrant; taste negligible or fabaceous.
Macrochemical reactions, SYR =slowly positive; GUA, FCL =positive; AN W, PHN, PYR =weakly positive to negative; KOH =browning; CRE, ANO =negative; IKI = dark brown.
Stipe tramal hyphae 5-16 µm diam, hyaline, clamped, thick-walled (wall up to 1.5 µm, thick), interwoven, not agglutinated or adherent; ampulliform clamps up to 18 µm broad, asymmetrical, not unusually thick-walled, with extensive, coarse, stalactitiform ornamentation; gloeoplerous hyphae rare, 3-5 µm diam, yellowrefringent. Tramal hyphae of upper branches 4-28 µm diam, inflated especially in medullary regions, hyaline, conspicuously clamped, thin-to thick-walled (wall up to 1 µm thick locally), with common false clamps, loosely parallel; ampulli form inflations not observed; gloeoplerous hyphae occasional, 2.5-5 pm diam, yellow, refringent, with abrupt swellings. Hymenium thickening; basidia 95-115 X 10-11 µm, elongate-clavate, clamped; conents densely granular or guttulate at all ages; sterigmata 4, long, slender, straight.
Spores (Fig. 5) 11.2-14.0x4.0-5.0 µm (E=2.14-3.45; Em=2.71; Lm= 12.16 µm), boletoid to cylindrial, 'flattened adaxially or with a suprahilar swelling, smooth in profile; contents (1-) 2 (-4)-guttulate, the guttules dark yellow, subrefringent, well-defined; wall up to 0.2 µm thick; hilar appendix not prominent, gradual, truncate, ornamentation usually none, occasionally a suggestion of illdefined, moderately cyanophilous markings of delicate ridges and small patches, in more or less longitudinal orientation.
Commentary; Spore dimensions appear unusually variable, with one specimen bearing spores with Lm= 12.68 µm, the other as 11.64 µm. Overall Lm, therefore, is unreliable as a taxonomic character, until more collections are examined.
A taxonomic complex of smooth-spored taxa of subg. Laeticolora can be readily identified (cf. Petersen, 19880. Fruitbodies of all included taxa are yellow to pale yellow, with brighter yellow or greenish yellow apices, with abortive bran cblets or stumps almost always present. Included at this time are two eastern North American taxa (R. obtusissima var, obtusissima and R. highlandensis, see below) which fruit in summer, one western North American taxon and its varieties (R. magni pes var. magni pes and var. al bidior), both vernal fruiters, two European taxa (R. obtusissima var. scandinavica and an undescribed taxon), and one taxon from North America and Europe (R. rasilispora var. scatesiana). All the western North American taxa show weakly amyloid stipe flesh but otherwise are macrochemically inert. Ramaria obtusissima reacts feebly in GUA, but produces larger spores than R. brunneipes. Only the hitherto undescribed R. highlandensis matches R. brunnei pes in virtually all respects. It is being described elsewhere.
The IKI reaction of stipe flesh is brown, not blue, bray-blue or blue with yellowish tints as it is for R. magn pes and R. rasilispora, As explained elsewhere (Petersen and Scates, 1989), the brown, violet-brown or red-brown reaction is
is usually cited as dextrinoid, not amyloid, and is typical of the R. rubripermanens-R. rubrievanescens complex of subg. Ramaria.
Diagnostic characters for R. brunnei pes are as follows; 1) yellow fruitbodies easily and extensively brunnescent. 2 ) clamped, long basidia; and 3 ) smooth, virtually unornamented spores.
In R H. Peterson's experience, coarsely dentate apices are often indicative of fruitbodies erumpent through considerable substrate. This is true of the western North American taxa listed above, as well as other vernal, partially hvpogeous fruitbodies. In R. brunneipes, some fruitbodies, or even portions of fruitbodies, produce such apices, while other parts exhibit finely divided, more typical apices. he has no evidence of subterranean fruitbody ontogeny in R. brunneipes.
Both collections cited below were purchased in the Lijiang market, attesting to the edibility of fruitbodies of the species. Others of the complex (R. magnipes, R. rasilispora) are commonly eaten also, but Peterson has no reports on R. obtusissima or R. highlandensis.
Specimens examined; Yunnan, Lijiang Pref., Lijiang market, 6 . ix. 86, no. 47304 (TENN); Lijiang market, 9. ix. 86, no. 47303 (holotype, TENN; isotype, HKAS; 20048).
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