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Two Novelties in Hechtia (Bromeliaceae, Hechtioideae) from Mexico

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and , morphologically related to and to , respectively, are described and illustrated. is endemic to the Mexican state of Morelos and is distinguished from by its flexuous and lepidote rachis, ovate-triangular primary bracts, sparsely lepidote pedicels, and brownish to blackish anthers; anatomically its leaves are characterized by their square adaxial epidermal cells with undulate walls, one or two layers of adaxial hypodermic cells, discontinuous chlorenchyma, oblong palisade cells, and the presence of raphides. , from the states of Oaxaca and Puebla, differs from by its larger habit, the lepidote peduncle and primary bracts, the length of the inflorescense branches and the larger foliar sheaths, blades, and floral bracts; anatomically its leaves are characterized by their irregular adaxial epidermal cells and by the number of vascular bundles.

Spanish
Sedescriben e ilustran Hechtia chichinautzensis y H. colossa , morfológicamente relacionadas con H. podantha y con H. tehuacana, respectivamente. Hechtia chichinautzensis es endémica del estado de Morelos y se distingue de H. podantha por presentar el raquis flexuoso y lepidoto, las brácteas primarias ovado-triangulares, los pedicelos esparcidamente lepidotos y las anteras pardas a negras; anatómicamente sus hojas se caracterizan por presentar células epidérmicas adaxiales cuadradas con paredes onduladas, por la presencia de una o dos capas de células hipodérmicas adaxiales, por el clorénquima discontinuo, por las células del clorénquima en empalizada oblongas y por la presencia de rafidios. Hechtia colossa , de los estados de Oaxaca y Puebla, se distingue de H. tehuacana por sus plantas de gran talla, con el pedúnculo y las brácteas primarias lepidotas, las ramas de la inflorescencia mucho más largas y las vainas y láminas foliares y las brácteas florales más grandes; anatómicamente sus hojas se caracterizan por la forma irregular de las células epidérmicas adaxiales y por el número de haces vasculares.
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Keywords: ANATOMY; ENDEMIC; HECHTIA PODANTHA COMPLEX; TAXONOMY

Document Type: Regular Paper

Publication date: 2010-10-01

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