Please do not re-click a link while waiting for a page to load. (It’s slower and degrades site speed for all users.)
To get images for machine learning, see MO Images for Machine Learning


When: 2008-10-08

Collection location: San Gabriel Mountains, Los Angeles Co., California, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

on north-facing mossy granite, at about 3000’, on lower Big Tujunga Canyon Road just below the Angeles Forest Highway
THALLUS: endolithic
APOTHECIA: forming umbilicate clusters, lecideine; rim black, carbonized, strongly crenulate, thick; disc deep red-black, smooth, undulate to concave; epihymenium dark brown, K-; hymenium clear, K/I+ deep blue; hypothecium light brown grading into dark brown below, K-; paraphyses v thin, strongly conglutinate even in K, tips abruptly thickened from about 1 µm to 2 µm, with dark pigment cap; asci thick-walled, thickened tip with broad bump protruding down into inner chamber, walls K/I+
SPORES: hundreds per ascus, hyaline, oblong, simple, to at least 4 × 1 µm maybe longer, impossible to get them to leave the ascus (if you press on it it ejects the entire inner “bag” of spores and this sticks out above the paraphyses tips like a balloon)


apothecia at 10×.
apothecium at 30x
apothecial section, in water, at 100x
ascus filled with spores, in water, at 1000x

Proposed Names

90% (2)
Used references: Nash’s Sonoran Flora
Based on microscopic features
Based on chemical features

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
No one has commented yet.