name | Limacella alachuana |
name status | nomen invalidum |
author | (Murrill) Singer ex Pegler non sensu? Pegler |
english name | "Alachua Slimy Stem" |
cap | The cap is 25–40 mm wide, white or isabelline, pale fuliginous in the center, convex to plane, and viscid; the flesh is white and unchanging; the margin is nonstriate and concolorous with nearby parts of the cap surface. The unversal veil was not described, but it probably consists of a slime layer covering the cap. |
gills | The gills are described as having narrow attachment to the stem and appear to be notched at the stem; they are crowded, lemon yellow, rather narrow, and have entire edges. Short gills were not described. |
stem | The stem is 50–60 × 2–4 mm, white, cylindric, smooth, undecorated, and viscid except for topmost part. The flesh, the bulb (if any) and the ring (if any) are not mentioned in the original description. The volva is apparently present as a partial covering of slime. |
odor/taste | The odor and taste of L. floridana are reported to be slightly of flour or meal. |
spores | Not described. |
discussion |
This description is just one illustration of the annoying state of affairs in Limacella taxonomy. One major problem is that complete inadequacy of the original descriptions. The study of Limacella requires that widely distributed collectors take up the cause and, this time around, produce sets of well-collected, well-dried, and well-documented material.—R. E. Tulloss |
brief editors | RET |
name | Limacella alachuana | ||||||||
author | (Murrill) Singer ex Pegler. 1983. Kew Bull., Addit. Ser. 9: 298, fig. 54A–B, pl. 6g. [Note: There is some question as to whether Pegler misapplied the name.—ed.] | ||||||||
name status | nomen invalidum | ||||||||
english name | "Alachua Slimy Stem" | ||||||||
synonyms |
≡Melanoleuca alachuana Murrill. 1938. Mycologia 30: 365.
≡Tricholoma alachuanum (Murrill) Murrill. 1938. Mycologia 30: 371.
≡Limacella alachuana (Murrill) Singer nom. inval., 1949??. ?? ??: ??. The editors of this site owe a great debt to Dr. Cornelis Bas whose famous cigar box files of Amanita nomenclatural information gathered over three or more decades were made available to RET for computerization and make up the lion's share of the nomenclatural information presented on this site. | ||||||||
etymology |
Alachua + -ana, suffix indicating possession; hence, "of Alachua" Honoring Alachua County, Florida, U.S.A. | ||||||||
MycoBank nos. | 109055 | ||||||||
GenBank nos. |
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holotypes | FLAS | ||||||||
intro |
The following text may make multiple use of each data field. The field may contain magenta text presenting data from a type study and/or revision of other original material cited in the protolog of the present taxon. Macroscopic descriptions in magenta are a combination of data from the protolog and additional observations made on the exiccata during revision of the cited original material. The same field may also contain black text, which is data from a revision of the present taxon (including non-type material and/or material not cited in the protolog). Paragraphs of black text will be labeled if further subdivision of this text is appropriate. Olive text indicates a specimen that has not been thoroughly examined (for example, for microscopic details) and marks other places in the text where data is missing or uncertain. The following is based on the protolog. For Pegler's interpretation see the "discussion" data field, below. | ||||||||
pileus | from protolog: 25–40 mm wide, white or isabelline, pale fuligineous on the disc, convex to plane, viscid; context white, unchanging; margin nonstriate, concolorous; gluten layer not described. | ||||||||
lamellae | from protolog: sinuate-adnexed, crowded, lemon yellow, rather narrow, with edges entire; lamellulae not described. | ||||||||
stipe | from protolog: 50–60 × 2–4 mm, white, cylindric, smooth, undecorated, viscid except for apical area; bulb ??; context ??; partial veil ??; gluten layer apparently as sheath. | ||||||||
odor/taste | from protolog: Odor and taste slightly farinaceous. | ||||||||
macrochemical tests |
none recorded. | ||||||||
pileipellis | probably absent. | ||||||||
ecology | from protolog: In pair. Florida: On "partly shaded lawn" or "under live oak." | ||||||||
material examined | from protolog: U.S.A.: FLORIDA—Alachua Co. - Gainesville, 18.ix.1932 Murrill s.n. (holotype, FLAS F9856, n.v.), 12.viii.1937 Murrill s.n. (paratype, FLAS 16031, n.v.). | ||||||||
discussion |
Murrill did not report anything about the spores in his protolog. The description of Pegler (1978) is based on his determination, which did not involve revision of the type collection: "Pileus 3–6 (–8) cm diam., fleshy, convexo-campanulate, broadly umbonate, expanding; surface light grayish brown to dark brown, covered with a thick gluten which rapidly dries, rugulose-scrobiculate over the disk, smooth elsewhere; margin entire, concolorous. Lamellae adnexed to almost free, whitish to pale cream, more or less ventricose, moderately distant but with numerous lamellulae. Stipe 4.5–5 (–8) × 1.2–1.5 cm, cylindric, solid; surface white and dry above the annular zone, strongly glutinous forming a greyish fibrillose annular zone but never a membranous annulus. Context moderately thick, soft, fragile soon decaying, white, unchanging, of very thin-walled, inflated hyphae, 5–30 µm diam., with clamp-connexions; odour and taste strong and unpleasant, earthy, not farinaceous. Spores 5.5–6.5 × 4.5–6 µm, (L’ = 6.0 ± 0.4 µm; W’ = 5.3 ± 0.3 µm; Q’ = 1.16), subglobose to globose [to broadly ellipsoid], inamyloid, hyaline, [colorless,] thin-walled, finely verruculose. Basidia 25–30 × 7–8 µm, clavate, bearing four short sterigmata. Lamella-edge fertile. Cheilocystidia and pleurocystidia absent. Hymenophoral trama distinctly bilateral, hyaline, with thin-walled, inflated hyphae, 5–15 µm diam. Subhymenial layer 15–24 µm wide, pseudoparenchymatous. Pileipellis [sic] an ixocutis [sic] of erect narrow, thin-walled hyphae, 2–3.5 µm diam., embedded in a glutinous matrix, 50–130 µm thick, and arising from a brown hypodermial[sic] layer...."Note that the pigments of the pileus appear to differ from those in the protolog; and the lamellae of the Antillean material are not "lemon yellow." Claimed for NE Mexico by García Jiménez and Garza Ocañas (1997). | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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name | Limacella alachuana |
bottom links | [ Keys & Checklists ] |
name | Limacella alachuana |
bottom links | [ Keys & Checklists ] |
Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer; and explanations prepared for this site talk about specimen-observer pairs associated with each data set. Combining more data into a single data set is non-optimal because it obscures observer differences (which may be valuable for instructional purposes, for example) and may obscure instances in which a single collection inadvertently contains a mixture of taxa.