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Editor's Picks

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An intercontinental artifical hybrid raised at Arboretum...
Roderick Cameron | Apr 12, 2020
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David More shares some of his magnificent illustrations of...
David More | Apr 08, 2020
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A project aims to recover and restore habitats in Serra de...
Justin Roborg-Söndergaard | Apr 07, 2020

Plant Focus

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First described by the Japanese botanist Bunzō Hayata in 1913, Quercus hypophaea is a medium to large evergreen oak restricted to the...

A new species of oak, Quercus delgadoana

An oak in cultivation as Quercus eugeniifolia has now been described as a new species (Novon June 2011).  

Quercus delgadoana S. Valencia, Nixon & L. M. Kelly (Fagaceae), a new species from the states of Hidalgo, Puebla, and Veracruz in the Sierra Madre Oriental, Mexico, is described and illustrated. Its morphological similarity to Q. eugeniifolia Liebm. (not known to be in cultivation), Q. sapotifolia Liebm., Q. salicifolia Née, Q. laurina Bonpl., and Q. affinis Scheidw., with which it shares narrowly lanceolate leaves and fasciculate stipitate trichomes in the axils of the secondary veins on the underside of the lamina is discussed. A dichotomous key is provided to distinguish these species.