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Persea pallescens, a New Combination for Phoebe pallescens (Lauraceae, Perseeae), a Mistaken Taxon of Mexico and Guatemala

Francisco G. Lorea-Hernández
Novon
Vol. 19, No. 2 (Jun., 2009), pp. 201-203
Stable URL: http://www.jstor.org/stable/40300913
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Persea pallescens, a New Combination for Phoebe pallescens (Lauraceae, Perseeae), a Mistaken Taxon of Mexico and Guatemala
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Abstract

Critical review of the morphology of Phoebe pallescens Mez shows that the species must be placed in Persea Miller subgen. Persea (Lauraceae, Perseeae) because of the pinninerved leaves, absence of domatia, stipitate staminal glands, well-developed staminodia, the pubescent gynoecium, flat hypanthium not developed into a cupule, and perianth lobes entirely deciduous in fruit. The new combination Persea pallescens (Mez) Lorea-Hernández, which is distinguished by its straight, appressed pubescence on leaves, is not a rare, local endemic as previously considered, but occurs along the eastern Sierra Madre in Mexico and in central Guatemala. The name Persea pallescens is lectotypified, and a key to separate the Mesoamerican species of Persea with a pubescent pistil is provided. /// Con base en una revisión crítica de la morfología de Phoebe pallescens Mez se concluye que la especie debe ser considerada en Persea Miller subgen. Persea (Lauraceae, Perseeae), debido a sus hojas penninervadas, la ausencia de domacios, glándulas estaminales estipitadas, estaminodios bien desarrollados, el gineceo pubescente, hipanto piano que no se desarrolla como una cúpula y lóbulos del perianto deciduos en el fruto. La nueva combinación Persea pallescens (Mez) Lorea-Hernández, que se distingue por su pubescencia recta y adpresa sobre las hojas, no es un endemita local y raro, como anteriormente se le consideraba, sino que se distribuye a lo largo de la Sierra Madre Oriental en México y en el centro de Guatemala. Además se designa el lectotipo del nombre Persea pallescens y se presenta una clave para separar las especies de Persea con pistilo pubescente en Mesoamérica.

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