Rhizocarpon reductum Th.Fr.
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Details
Rhizocarpon reductum Th.Fr. (1874)
Rhizocarpon reductum Th.Fr.
Biostatus
Nomenclature
Th.Fr.
Th.Fr.
1874
633
ICN
Rhizocarpon reductum Th.Fr.
species
Rhizocarpon reductum
Classification
Synonyms
Descriptions
Thallus crustose, spreading, closely attached, tartareous, greyish-white, continuous to areolate-cracked, prothallus indistinct or lacking. Areolae to 1 mm diam., separated by very narrow cracks, plane, smooth, matt. Apothecia numerous, innate, scattered between areolae, disc black, plane to subconvex, epruinose. Hymenium colourless 100-120 µm tall. Paraphyses capillary, straight, not much branched, not swollen at apices. Asci ellipsoid-clavate, rounded at apices, 8-spored. Ascospores colourless becoming brownish, ellipsoid to oval, muriform, cells minute, angular, 27-29 × 9-11 µm, halonate.
Thallus crustose, orbicular to spreading, to 8 cm diam., areolate, prothallus indistinct or absent. Areolae small, 0.2-0.3 mm diam., greyish-white, plane to convex, often almost nodular-papillate, separated by narrow black, cracks. Apothecia crowded, scattered, sessile, rounded, black, shining, epruinose, 0.5-1 mm diam., plane to convex, margins prominent, entire. Hymenium brownish, 120 µm tall. Paraphyses filiform, not much branched. Hypothecium thick, brown-black. Asci 8-spored, oval-clavate, apices rounded. Ascospores triseriate, colourless to brownish, ellipsoid, apices rounded, muriform, 18-23 × 7.5-9 mm, surface corrugate.
Taxonomic concepts
Rhizocarpon convexulum Zahlbr.
Rhizocarpon reductum Th.Fr.
Rhizocarpon obscuratum auct. non (Ach.) A.Massal.
Rhizocarpon reductum Th.Fr.
Rhizocarpon reductum Th.Fr.
Rhizocarpon reductum Th.Fr.
Rhizocarpon reductum Th.Fr.
Rhizocarpon thomsonii Zahlbr.
Rhizocarpon reductum Th.Fr.
Rhizocarpon thomsonii f. fuscidulum Zahlbr.
Rhizocarpon reductum Th.Fr.
Collections
Metadata
c29e721d-f3dc-4e0a-9ac1-288ebe02d0d5
scientific name
Names_Plants
16 July 2010