Observation 67191: Peltigera rufescens (Weiss) Humb.

When: 2011-05-10

Collection location: Pine Grove Junction, Republic, Ferry Co., Washington, USA [Click for map]

48.65371° -118.674962°

Who: Karl Volkman (Paleoichenum)

No specimen available

found intergrowing with moss on the northern facing side of a railroad cut.

Proposed Names

54% (2)
Recognized by sight
56% (1)
Recognized by sight: densely tomentose with ascending (not down-turned) margins

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Two similar Peltigera species
By: Jason Hollinger (jason)
2011-05-10 21:08:11 CDT (-0400)

Both P. rufescens and P. ponojensis look very similar, grow in similar habitats, and I’m not qualified to distinguish the two reliably from above. The underside is the key:

P. rufescens — veins very low and indistinct, turning dark brown/gray/black abruptly toward center of thallus, rhizines bushy and typically coalescing into a matt

P. ponojensis — veins more distinct and “ropy”, typically pale throughout though sometimes darkening gradually toward center, rhizines distinct to brush-like to occasionally bushy but never coalescing into a matt

Amazingly, it’s looking very much like the two species are unrelated taxonomically speaking. But to the field naturalist, they will continue to form a useful species-pair.

Created: 2011-05-10 20:45:18 CDT (-0400)
Last modified: 2011-05-10 21:01:55 CDT (-0400)
Viewed: 32 times, last viewed: 2017-06-09 11:43:00 CDT (-0400)
Show Log