Observation 21059: Lasallia papulosa (Ach.) Llano

Identification: There are two North American species of Lasallia and both of them occur in the higher elevations of the southern Appalachian Mountains:
(1) Lasallia papulosa has a brown or tan undersurface, and is “common; on rock” at high elevations in the southern Appalachians (Dey, 1978)
(2) Lasallia pensylvanica has a black undersurface, and is “widespread but not common; on exposed rock” at high elevations in the southern Appalachians (Dey, 1978)
A bit of undersurface is visible in the second photo, and it is tan, so this is Lasallia papulosa.

Common name: common toadskin

[admin – Sat Aug 14 02:03:47 +0000 2010]: Changed location name from ‘Newfound Gap, Great Smoky Mountains NP, Tennessee’ to ‘Newfound Gap, Great Smoky Mountains National Park, Tennessee, USA’

Species Lists


Proposed Names

28% (1)
Used references: Dey (1978), and Hinds and Hinds, “The Macrolichens of New England,” 2007, pp.281-283,

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Created: 2009-05-15 22:56:15 AEST (+1000)
Last modified: 2015-08-04 02:50:04 AEST (+1000)
Viewed: 273 times, last viewed: 2019-01-29 09:27:36 AEDT (+1100)
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