Search on : Taxa descriptions


Description type:Original description 
Description:RAMARIA GLAUCO-AROMATICA Petersen, sp. nov.
Receptacula ad 15 x 5 cm, ramosissima, crassa; stipte ad 1.5 cm crasso, e mycelio floccoso, cremeo-alba (sicco albisissima) orienti, fortiter virescenti; ramis crassis, pisaceo-
ochraceis; apicibus acutis, cremea ad flava; odor siccus de "fenugreek". Spores 8.2-11 x 4.4-5.5 µm, ovoideis ad sublacrymiformibus, asperulosia. America Boreali occidentale.
Type (holotype): TENN -- Idaho, Boundary Co., 3.5 mi north of upper Priest River, 25.ix.68, coll. RHP, TENN no. 34144 (with notes and transparency).
Colored Plate 2, Fig. 4; Pl. 3, Figs. 6, 7; Pl. 10, Figs. 7, 8; text Figs. 56, 57.
Fruitbodies up to 15 cm high, up to 5 cm broad, copiously branched, the branches all erect and ascending giving the fruitbody a columnar appearance; arising from a definite stipe portion some or most of which may be beneath the substrate level. Stipe up to 1.5 cm thick, often swollen below substrate level, snow-white and cottony below substrate level, remaining so after drying, subtended by delicate inconspicuous white rhizomorphic strands, upward ochraceous olive, staining in the field to intense blue-green ("meadow green", "antique green", 26-D-7, 26-E-7 of Methuen), and slowly (in a few hours) changing color to deep olive after picking or on exposure ("pyrite yellow", to "olive green"). Major branches 2-several, lobed in cross-section, ascending, rebranched into 3-6 ranks; branches greenish ochraceous when fresh ("colonial buff", "pyrite yellow", 4-C-7, 4-D-6,7 of Methuen), becoming watery where handled and then changing color to ochraceous olive ("olive green"), on drying changing to greenish olive; axils acute to very narrowly acute; apices acute, often cusped, di-trichotomous, yellow to cream ("antimony yellow", "cartridge buff", 5-B-7 of Methuen). Odor none, on drying moderate to strong of fenugreek; taste mildly bitter.
Western North America, from New Mexico to Alberta; on conifer duff.
Hyphae of basal tomentum 1.4-2.3 µm diam, thin-walled, hyaline, conspicuously clamped; ampulliform clamps to 12 µm broad, thin-walled; complicated stellate crystalline material (Fig. 57) often found in basal mat. Hyphae of branch trama 2.3-13 µm diam, thin-walled, hyaline, conspicuously clamped, generally longitudinally oriented; ampulliform clamps occasional, up to 15 µm broad. Subhymenium rudimentary. Hymenium thickening; basidia 55-65 x 6.8-7.2, clavate, clamped, hyaline when immature, becoming multiguttulate when mature, the guttules yellowish under bright field, (3)-4-sterigmate; sterigmate delicate, divergent, sometimes incurved.
Spores (Fig. 56) 8.2-11.1 x (4.1)4.4-5.5 µm (E= 1.79-2.33 (2.55); Em = 2.05), sublacrymiform to ovoid with subattenuate apicular end often curved somewhat, yellow-other in prints; content homogeneous to 1-2-guttulate, the guttulae brownish under phase contrast, hyaline under bright field; wall up to 0.4 µm thick, moderately cyanophilous; apiculus a hyaline, thin-walled, acyanophilous, nipple-like extension of the spore contents; ornamentation of numerous, scattered, strongly cyanophilous warts or rounded spines up to 1 µm long but usually shorter, usually about 0.5-0.7 µm long.
Macrochemical reactions: Branches sections deep blue in GUA, olivaceous in guaiacol, slowly orange in PYR, deep olivaceous in KOH or FSW; showing no color change in ANW, ANO.
OBSERVATIONS: First referred to me by Dr. Alexander Smith from his collections, I have seen fresh material of this very striking species from only one location in relatively remote northern Idaho. Fruitbodies of the species are immediately recognizable by the intense blue-green stains at the base even before the fruitbody is picked, usually just above the snow-white stem base. Within a few hours in wax paper, or exposed, the entire fruitbody becomes deep greenish olive in color, but the stem base remains snow-white (even on specimens stored for at least three years). The stem-base is much larger, involving more basal tomentum, than in R. abietina, and hence is much more striking.
Corner (1970) listed only two species with virescent color reactions. Of these, R. abietina (as R. ochraceo-virens) is clearly distinct, with smaller fruitbodies, and smaller more delicate spores. The other species, R. echinovirens, seems extremely close to R. glauco-aromatica. Three characters separate them: 1) the flesh of fruitbodies of R. glaucoaromatica is not especially virescent, only the stipe and branch surfaces; 2) Ramaria echinovirens is reported from under Quercus, white R. glauco-aromatica is known from under conifers; and 3) spores of R. echinovirens are reported as 9.6-13 x 2.8-4.8 µm, slightly larger but narrower than those of R. glauco-aromatica. A third species, R. ochrochlora (q.v.), has now been described from Switzerland, extremely close to these two, but again with different spores (I measure 10.4-14.4 x 4.4-5.2 m; E = 2.07-3.25). These three species, all with virescent color reactions and large fruitbodies, obviously closely related, make an interesting distributional pattern, ranging from the Himalayas, to the Rockies, to the Alps. One wonders what the Andes have to offer.
Taxon name: