Consuelo E. Hernández Padrón

Depsidones from Lobaria pulmonaria and their chemotaxonomic importance

Seven β-orcinol depsidones were isolated from Lobaria pulmonaria (L.) Hoffm. var. meridionalis (Vain) Zahlbr. gathered on Pinus canariensis, three, methylstictic acid, hypostictic acid and cryptostictic acid, for the first time from this species. Stictic acid and constictic acid acetone condensation derivatives were formed during the extraction process. The possible chemotaxonomic implications are discussed.

Chemical constituents of the lichen Cladina macaronesica

Column chromatography of the acetone extract of the lichen Cladina macaronesica (Sephadex LH-20, silica gel and silver nitrate-im pregnated silica gel) afforded eight triterpenes identified by chemical and spectral m eans. α-Amyrenone, lupenone, taraxerol, taraxerone and /so-arborinol acetate were isolated for the first time from lichens and (-)-usnic acid and five mononuclear phenolic compounds were also obtained, four for the first time as natural products. The possible transformation of perlatolic acid into these phenolic compounds is briefly outlined.

Chemical constituents of the lichen Stereocaulon azoreum

Column chromatography of the acetone extract of the lichen Stereocaulon azoreum afforded several substances identified by chemical and spectral means; α-amyrin, lupeol, taraxerol, ursolic acid, ergosterol peroxide, brassicasterol, cerevisterol, stictic acid and an acetone-condensation derivative, lobaric acid. Furthermore atranorin, methyl β-orsellinate, atranol and, for the first time from the genus Stereocaulon, cryptostictic acid and the dibenzofuran, strepsilin were isolated.

Xanthoparmelia teydea, a new brown Xanthoparmelia (Parmeliaceae) from the Canary Islands

Abstract Xanthoparmelia teydea is described as new to science. This new species was found on basaltic rocks in the high mountains of the Canary Islands, in El Teide National Park (Tenerife Island). A description of the species is given together with notes on its chemistry, distribution, ecology and taxonomy. Possible associated taxa are briefly discussed.

Usnea brasiliensis (Zahlbr.) Motyka (Parmeliaceae), a new amphi–Atlantic disjunct lichen species

Abstract The lichen Usnea brasiliensis (Zahlbr.) Motyka is reported for the first time outside of the American continent from the Canary Islands. A description of the species is provided and possible relationships with other taxa are briefly discussed.

Flora y vegetación liquénica epífita de los sabinares Herreños

SE ABORDA EL ESTUDIO DE LA FLORA Y VEGETACION SIQUENICA EPIFITA DE LOS SABINARES HERRENOS QUE DESEMPENAN UN DESTACADO PAPEL EN EL PAISAJE VEGETAL DE LA ISLA. OCUPAN AMPLIOS SECTORES ENTRE LOS 300-700 M DE ALT. Y REBASAN CON FRECUENCIA ESTOS LIMITES PUDIENDO ENCONTRARSE SABINAS DISPERSAS DESDE LOS 100 HASTA LOS 1400 M. SE DIFERENCIAN 4 TIPOS DE SABINARES; HUMEDOS SEMIHUMEDOS MIXTOS (CON PINAR) Y ARIDOS. LOS CONDICIONAMIENTOS ECOLOGICOS A LOS QUE ESTAN SOMETIDOS REPERCUTEN DECIDIDAMENTE EN EL ESTABLECIMIENTO Y DESARROLLO DE SU VEGETACION EPIFITA. SE AFRONTAN EL ESTUDIO DE LAS DISTINTAS COMUNIDADES SIQUENICAS (ADJUNTANDOSE TABLAS FITOSOCIOLOGICAS DATOS CAROLOGICOS ECOLOGICOS Y FLORISTICOS) EN CADA VERTIENTE DE LA ISLA SIENDO EL SECTOR MAS RICO Y VARIADO EN NW. FINALMENTE SE PRESENTA UN CATALOGO DE 100 ESPECIES (PERTENECIENTES A 52 GENEROS) QUE INCLUYE CLAVES ORIGINALES DESCRIPCIONES DATOS ECOLOGICOS MAPAS DE DISTRIBUCCION ICONOGRAFIA MICRO Y MACROFOTOGRAFIA EXSICCATA ETC.

Moelleropsis nebulosa subsp. frullaniae (Pannariaceae), a Disjunct and Poorly Known Lichen, New to Macaronesia

Abstract: Pérez-Vargas, I, Hernández Padrón, C. & Losada-Lima, A. 2014. Moelleropsis nebulosa subsp. frullaniae (Pannariaceae), a disjunct and poorly known lichen, new to Macaronesia. — Herzogia 27: 409–412. Moelleropsis nebulosa subsp. frullaniae has been discovered in the Canary Islands for the first time in the Macaronesian Region growing on two species of the liverwort genus Frullania. A revised description based on our own observations, data on their habitats and ecology are presented. Similar taxa are briefly discussed.