ORIGINAL ARTICLE
Notes on the genus Usnea (lichenized Ascomycota, Parmeliaceae). V.
1
Conservatoire et Jardin botaniques de la Ville de Genève, Case postale
71, CH-1292 Chambésy/Geneva, Switzerland
2
Department of Botany, National Museum of Nature and Science,
4–1–1 Amakubo, Tsukuba, Ibaraki, 305-0005, Japan
Publication date: 2023-12-29
Plant and Fungal Systematics 2023; 68(2): 340-352
KEYWORDS
ABSTRACT
Type material of twelve species of Usnea related to Asia and South Africa were
studied and one species from North America is newly described. Holotype specimens of
eight Chinese taxa described in 1975 were synonymized as follows: U. mengyangensis is
lectotypified and synonymized with U. aciculifera. Usnea recurvata and U. subrectangulata
are synonymized with U. baileyi. Usnea kirinensis is synonymized with U. barbata
s.str. Usnea crassiuscula and U. yunnanensis (= U. australis J.D. Zhao et al., nom. illeg.
non Fr.) are synonymized with U. bismolliuscula. Usnea iteratocarpa is synonymized with
U. cristatula (new to Asia, China). Usnea decumbens is synonymized with U. intumescens
(new to Asia, China). Usnea entoviolata and U. roseola are synonymized with U. fragilis
(new to Asia, China, India, Japan). The lectotype of Usnea trichoideoides was found to
belong to the Usnea pectinata aggr. and consequently U. montis-fuji was resurrected for
U. trichodeoides sensu Ohmura. Usnea ceratina and U. trichodeoides are excluded from
the Japan lichen flora. Usnea macaronesica a recently described Macaronesian and South
American species is synonymized with the Asian taxa U. pycnoclada. Usnea chicitae is
described as a new species endemic of the Southern Appalachian Mountains. It is characterized
by stipitate efflorescent soralia, a tenuicorticata-type of CMA and the presence of
salazinic and psoromic acid in the medulla.
FUNDING
NO
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