When: 2016-05-04

Collection location: Lompoc, California, USA [Click for map]

Who: J-Dar

Specimen available

This species is common in maritime chaparral on ancient stabilized sand dunes, where it occurs on twigs of a variety of shrubs. This specimen was on dead twigs of Artemisia californica, coastal sagebrush.

Thallus whitish-green, thin, strongly K+Y, C+O. Note: The Sonoran Flora describes B. oidalea as K-, but I think that is a typo. It is described as K+Y elsewhere. Apothecia plane becoming convex, essentially globose, lacking pruina. Hymenium strongly inspersed with oil drops, impossible to get a clear view of ascospores, IKI+blue fading clear.

Spores seemed to be 8/ascus, becoming brown, muriform, with 15-18 cells or difficult to count. Spores usually have unpigmented apices (see photo). Approx. Measurements (struggling to get microscope calibrated well at 40x): 34×13µm 38.5×14µm 34×12µm 32×11.5µm 47×17µm


K+Y reaction at top right.
C+O reaction very strong
K+Y, also very strong. See notes about K reaction.
Oil inspersion in hymenium
Muriform spore showing unpigmented apices and many cells

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