name | Amanita baccata sensu Arora |
name status | sensu |
cap | The cap of Amanita baccata sensu Arora is 40 - 100 (-120) mm wide. It is white and unchanging when cut or bruised although it sometimes discolors to buff with age. It appears dull when dry, and is viscid when moist. The margin is often hung with flaps of submembranous to subfelted material and is not striate. The cap is convex at first, then unevenly broadly convex, and finally becomes irregularly flattened, eventually with the center depressed. The white volval remains on the cap take the form of mealy to powdery warts or flat patches, or simply may be a thin layer of loosely woven fibrils. The volva may disappear in age. |
gills | The gills of Amanita baccata sensu Arora are narrowly attached to the stem or notched at the stem or (occasionally) free. The gills leave faint decurrent lines on the top of the stem. They are closed dirty white in mass; in side view, they are grayish pale cream to grayish buff to grayish cream in the button and dirty yellowish cream at maturity (distinctly more yellow and less beige than in button). The plentiful short gills are squarely cut-off or have a somewhat rounded corner and are of diverse lengths. |
stem | The dry, white stem measures 50 - 82 × 5 - 25 mm. It sometimes exhibits yellow or buff stains. For some distance at its top, it is decorated with white fibrillose-floccose to powdery material (with the upper 1 - 3 mm, densely flocculose at first and striate). The bulb is 36 - 92 × 11.5 - 38 mm, like an inverted egg or turnip- or carrot-like (in the latter case, often somewhat lumpy) and has a rounded bottom. The stipe's ring may be missing or poorly defined or present and subfelted; when present, it is usually superior, white, ragged, cottony, attached at the lower edge of the flocculent zone on the upper stem (mentioned above), and ephemeral. Volval material is not evident in mature material. In buttons, the volval may appear as a flocculent limb at the broadest point of the stem's bulb (very close to the bulb's top). |
odor/taste | This mushroom has an odor that is mild or slightly pungent, strongly suggesting (to RET) A. subsolitaria (Murrill) Murrill. Its taste has not been recorded. |
spores | Spores of this species measure (8.8-) 9.8 - 12.5 (-15.8) × (4.8-) 5.2 - 6.5 (-8.5) μm and are amyloid and elongate to cylindric (infrequently ellipsoid, occasionally constricted). Clamps are present at bases of basidia. |
discussion | Amanita baccata sensu Arora has been collected in Santa Cruz Co., California, U.S.A. According to Arora (1986), this mushroom is found in moderately dense brush, by roads, in clearings, and in other relatively open areas. Among the woody plants with which it has been reported are Pine, Oak, Chinkapin, and Manzanita.—R. E. Tulloss and M. C. Macher |
brief editors | RET |
name | Amanita baccata sensu Arora | ||||||||
name status | sensu | ||||||||
GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
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selected illustrations | Arora. 1986. Demystified, 2nd ed.: 274 & pl. 54. | ||||||||
intro |
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 material not directly from Arora (1986) is based on original research by R. E. Tulloss and David Arora. | ||||||||
pileus | 40 - 100 (-120) mm wide, white, unchanging when cut or bruised, sometimes discoloring buff with age, convex in button, then unevenly broadly convex, becoming irregularly subapplanate, with disc eventually somewhat depressed, dull when dry, tacky to viscid when moist; context white, becoming faintly yellowish in old material, soft, 9- - 11 mm thick, thinning evenly to margin; margin appendiculate with flaps of submembranous to subfelted material (becoming more felted with in situ drying), nonstriate; universal veil as white mealy to powdery warts or flat patches, or simply as thin layer of loosely woven fibrils, detersile in age, with cap surface apparently receding from areas covered by warts. | ||||||||
lamellae | narrowly adnate or sinuate, occasionally free, with faint decurrent lines on stipe apex, close, in mass sordid white, in side view sordid pale cream to sordid buff to sordid cream in button and sordid yellowish cream at maturity (distinctly more yellow, less beige, than in button), becoming sordid yellowish in age, drying sordid pale yellow (slightly grayer than 3A3), 9- - 12 mm broad, with flocculent edge slightly paler than hymenium; lamellulae truncate to subtruncate to rounded truncate, plentiful, of diverse lengths unevenly distributed, plentiful, sometimes at least one between each pair of lamellae. | ||||||||
stipe | 50 - 82 × 5 - 25 mm, dry, white, sometimes with (yellow or buff stains (sometimes faint and slow to appear), cylindric or slightly narrowing upward, flaring slightly and over some distance at apex, decorated with white fibrillose-floccose to pulverulent material (with upper 1 - 3 mm, densely flocculose at first and striate); context white; bulb 36 - 92 × 11.5 - 38 mm, obclavate to napiform to dauciform (in latter case, often somewhat lumpy), bottom rounded; exannulate or with partial veil poorly defined to subfelted, superior, white, ragged, cottony, attached at lower edge of aforementioned flocculent zone on upper stipe, ephemeral; universal veil not evident in mature material, in buttons as flocculent limb at broadest point of bulb (very close to bulb apex). | ||||||||
odor/taste | Odor mild or slightly pungent, strongly suggesting (to RET) A. subsolitaria (Murrill) Murrill. Taste not recorded. | ||||||||
macrochemical tests |
none recorded. | ||||||||
lamella trama | bilateral, divergent; central stratum broad; ??; clamps observed. | ||||||||
subhymenium | basidia arising from occasionally branching, uninflated hyphal segements which arise in turn from inflated intercalary cells of lamella trama. | ||||||||
basidia | 44 × 9.8 - 12.0 µm, ??-sterigmate, thin-walled; clamps observed. | ||||||||
basidiospores | [80/3/2] (8.8-) 9.8 - 12.5 (-15.8) × (4.8-) 5.2 - 6.5 (-8.5) μm, (L = 10.6 - 11.7 μm; L' = 11.1 μm; W = 5.6 - 6.3 μm; W' = 5.8 μm; Q = (1.54-) 1.68 - 2.16 (-2.56); Q = 1.80 - 1.98; Q' = 1.90), hyaline, colorless, smooth, thin-walled, amyloid, elongate to cylindric, infrequently ellipsoid, occasionally constricted, sometimes with one end expanded, ??; apiculus sublateral, cylindric, proportionately small; contents granular to mono- to multiguttulate; color in deposit not recorded. | ||||||||
ecology | Solitary to scattered. Per Arora (1986), In moderately dense brush, by roads, in clearings and in other relatively open areas. In sand with Pinus or in sandy soil with some organic content of rather open brushy area with Pinus, Quercus, Castanopsis, and Arctostaphylos. | ||||||||
material examined |
U.S.A.:
CALIFORNIA—Santa Cruz Co. - Henry Cowell Redwoods St. Pk., ca. campground, off Graham Hill Rd. & east of river, 15.i.2003 D. Arora & R. E. Tulloss 1-15-03-A (RET 366-2); ca. Santa Cruz, | ||||||||
discussion | A NAMA foray collection in F (NAMA 2012-205) of which images were posted on Mushroomobserver (#189205) was proposed to belong to the present species. Good photos are included in the cited MO observation. In addition to the materials examined listed above, the following materials should be examined for possible inclusion here: RET 459-2 and RET 749-6 (Santa Cruz Co., California), and RET 771-1 (Coconino Co., Arizona). | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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