Observation 31891: Caloplaca microphyllina (Tuck.) Hasse

When: 2010-01-02

Collection location: Davis Mountains, Texas, USA [Click for map]

Who: Chris Parrish (kitparrish)

No specimen available

Locality: 30°42’26.84"N, 104° 6’20.59"W, el. 1785 m; roadside picnic area W of McDonald Observatory on Hwy 118

Substrate and habitat: Growing on wood in an open woodland of piñon, juniper, and oak.

Identification: Caloplaca growing on wood and showing a pale yellow, areolate thallus, orange apothecia, some with a thallus-colored rim and some without, and with many small soralia appearing as rounded mounds of yellowish orange soredia. Brodo mentions three species of Caloplaca similar to this one (characterizations from Brodo, Sharnoff, and Sharnoff, 2001, pp.200-201):
Caloplaca flavovirescens (on rocks containing calcium, non-sorediate)
Caloplaca flavorubescens (on bark and wood, non-sorediate)
Caloplaca chrysophthalma (on bark and wood, bright yellow-orange soralia)
This photo matches the description of Caloplaca chrysophthalma. It keys out smoothly in Bruce Ryan’s Caloplaca keys (unpublished), first to the Caloplaca citrina group, and then to Caloplaca chrysophthalma.

CNALH Caloplaca chrysophthalma photos and locality map, and a larger, interactive locality map.

Sharnoff’s Caloplaca chrysophthalma gallery

Common name: bark sulphur-firedot lichen


soralia forming mounds of yellow-orange soredia (detail from photo 73920)
soralia forming mounds of yellow-orange soredia (detail from photo 73920)

Proposed Names

0% (2)
Used references: Used references: Brodo, Sharnoff, and Sharnoff, 2001, pp.194-205
0% (2)
Recognized by sight: soralia appearing as mounds of yellow-orange soredia
Used references: Brodo, Sharnoff, and Sharnoff, 2001, pp.200-201; Bruce Ryan’s Caloplaca key (unpublished)
56% (1)
Recognized by sight: obvious superficial dark orange thallus with laminal orange soralia
Used references: Wetmore. 2004. The sorediate corticolous species of Caloplaca in North and Central America.

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Created: 2010-01-12 10:22:22 CST (-0500)
Last modified: 2012-06-08 16:34:04 CDT (-0400)
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