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Montana Field Guide

Montana Field Guides

Thorn Lichen - Dendriscocaulon umhausense

Species of Concern

Global Rank: GNR
State Rank: SNR
* (see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
Known from one location in western Montana.
General Description
The genus "Dendriscaulon" applies to the cynobacterial photomorph of several species represented by several genera and is not yet a valid taxonomic entity. "Dendriscocaulon": Thallus minutely fruticose, erect, mostly 3-10(20) mm tall, cream to grayish, basal branches becoming dark gray to gray brown at the tips, richly branched, corticate; main branches densely tomentose with fine whitish or hyaline hairs; podetia solid; apothecia unknown; and chemical spot tests negative (McCune and Geiser 2009).

On a rock (weakly calcareous) face in a Pseudotsuga-Holodiscus forest.

Threats or Limiting Factors
None identified.

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Citation for data on this website:
Thorn Lichen — Dendriscocaulon umhausense.  Montana Field Guide.  .  Retrieved on , from