Observation 175579: Xylaria Hill ex Schrank

When: 2014-08-29

Collection location: Barkhamsted, Connecticut, USA [Click for map]

Who: Robert(the 3 foragers) (the3foragers)

No specimen available

Proposed Names

85% (1)
Recognized by sight

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Eye3 = Observer’s choice
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By: Roo Vandegrift (Werdnus)
2017-08-03 11:12:11 PDT (-0700)

Well, honestly, I don’t have any actual experience Xylaria tentaculata — I’ve never examined any collections in person. But yeah, they do seem to be mostly pretty slender when I’ve seen them illustrated. Most descriptions of the fungus don’t seem to mention the range of variation in this trait, though. For example, Rogers et al. (2008) says:

“This fungus has a distinctive anamorphic state in which elongated processes extend from the apical part of an upright rachis in a floral or stellate arrangement; thus the epithet tentaculata. No trace of the anamorphic state is usually seen on the mature stroma. The fungus is discussed by Brown (1913) and Callan and Rogers (1990).”

They don’t illustrate it, though. For that, they point you to Callan & Rogers (1990), which is a bit more precise:

“Stromata when immature bearing the anamorph on long, pale greayish tan, unbranched, tapering, tentacle-like appendages 0.5–2cm long x ≤ 0.3 mm diam, bases attached to the apex of the stipe. Conidiogenous cells in palisades over the surfaces of appendages, cylindrical, 20–30 x 3–6 µm, covered with conical conidial secession scars.” They also note that Berkeley and Broome’s type material was noted by Lloyd to not include any perithecial material, and that the species was likely described entirely on the uniqueness of the anamorph, or a part of the type has been lost. They go on to point out that Brown (1913; which I don’t have easy access to at the moment) detailed the developmental morphology, including perithecial formation.

The illustrations provided by Callan & Rogers (1990) show quite slender conidial appendages, though. Make of that what you will.

i see the temptation
By: Danny Newman (myxomop)
2017-08-03 09:56:05 PDT (-0700)

in calling a tentacled Xylaria X. tentaculata, but in my experience (Werdnus, feel free to chime in), the “tentacles” of that sp. are slender, even, and radiate outwards from a single point at the apex of the stipe.

Created: 2014-08-29 15:17:02 PDT (-0700)
Last modified: 2017-08-03 11:12:21 PDT (-0700)
Viewed: 39 times, last viewed: 2018-03-27 07:07:52 PDT (-0700)
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