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Description type:Original description 
Description:Ramaria bulbobasidiata R. Petersen, sp. nov. FIGS. 5-7
Fruitbodies (FIGS. 6, 7) up to 9 x 3 cm, obovate in profile when mature. Stipes up to 30 x 25 mm, but usually narrower, fasciculate in a cluster, tapering gradually, white at base, upward "light buff," hygrophanous when handled but not changing color, smooth, mycelioid at very base, involving significant substrate; flesh solid, moist but not watery, white, drying minutely flecked with beige; aborted branchlets common, scattered over stipe, bright yellow ("light orange yellow"). Major branches 2-several, ascending but not strict, up to 5 mm thick, pale creamy yellow ("pale orange yellow"). Branches in 4-5 ranks, ascending but not strict, creamy salmon colored (between "light ochraceous salmon" and "pinkish buff"); axils lunate below, narrowly rounded above; internode ratio diminishing gradually at maturity; flesh of upper branches yellow ("light orange yellow"). Apices minutely dichotomous when young, and then bright light yellow ("light orange yellow"), remaining so until fruitbody maturity, finally elongating to become bluntly, minutely cusped and somewhat divaricate, concolorous with branches in age (near "light ochraceous buff"). Odor weakly fabaceous; taste negligible, somewhat musty in throat.
Macrochemical reactions: FCL = strongly but tardily positive; GUA = negative on branch sections, strongly positive on stipe surface; PHN, PYR, NOH, KOH, ANO, ANW, IKI = negative.
Tramal hyphae of stipe up to 13 µm diam, thin-walled, hyaline, tightly interwoven, clampless; ampulliform septa common, up to 14 µm broad, thick-walled (wall up to 2 µm thick), prominently ornamented. Tramal hyphae of upper branch es similar, more or less parallel; septa often constricted; ampulliform septa rare. Hymenium thickening; basidia 60-70 x 10-14 µm, broadly clavate, clampless, inflated somewhat abruptly distally when mature; contents granular to oily; sterigmata 4, coronate, hardly cornute.
Spores (FIG. 5) 9.4-12.3 x 4.3-5.4 µm (E = 2.00-2.75; Em = 2.25; Lm = 10.57 µm), ellipsoid, somewhat flattened adaxially, prominently roughened in profile; contents uni- to multiguttulate at maturity; wall up to 0.2 µm thick; hilar appendix gradual; ornamentation of strongly cyanophilous, prominent, mostly discrete warts, with a few meandering ridges.
Commentary. -Ramaria aurea (Schaef : Fr.) Quelet, as redescribed by Petersen (1974) shares the clampless state and coloration of R. bulbobasidiata. Both show rich yellow colors at the apices and lower branches, but a pallid salmon tint in the middle and upper branches. Ramaria aurea, however, produces shorter, uninflated basidia and fruitbodies exhibiting single stipes with no abortive branchlets. Spores of R. aurea (11-13 x 4.8-5.9 µm) are longer than those of R. bulbobasidiata.
Also rather similar to R. bulbobasidiata is R. lutea (Vitt.) Schild. It shares coloration and presence of aborted branchlets, but forms a single, massive stipe. In my interpretation of it (from my own fresh material gathered in Switzerland), it is clampless, with spores 12.5-15 x 5.5-7.2 µm.
The inflation of basidia seems consistent but ontogenetically late. The hymenium is crowded with basidioles, and inflation apparently occurs just before spore discharge, perhaps as a means of clearing away the surrounding impeding basidioles.
SPECIMENS EXAMINED: NORTH CAROLINA: Transylvania Co., Pisgah Nat. For., Yellow Gap Rd., 24.vii.84, No. 45710 (HOLOTYPE-TENN); Macon Co., Wayah Rd., vic. Wine Springs Bald, coll. A. M. Evans, C. and R. H. Petersen, 2.viii.84, No. 45698 (TENN); Macon Co., Ammons Branch Campground Trail, 26.vii.84, No. 45713 (TENN).
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