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Anatomía foliar en Proteaceae sudamericanas, con énfasis en las esclereidas

Author(s): Torres, Fresia

Journal: Plantula
ISSN 1316-1547

Volume: 1;
Issue: 2;
Start page: 107;
Date: 1996;
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Keywords: Leaf anatomy | Sclereids | Proteaceae | Sclerophyll

The foliar anatomy including the types of sclereids, their distribution and orientation was studied in nine species (of six different genera) of South American Proteaceae, all belonging to the Grevilloideae subfamily: Embothrium coccineum J. R. Forster & G. Forster, Lomatia dentata (Ruiz &Pav.) R. Br., L. ferruginea (Cav.) R. Br. and L. hirsuta (Lam.) Diels ex Macbr. of the tribe Embothrieae; Gevuina avellana Mol., Panopsis polystachya (H. B. K. ) Kuntze, Roupala mollis Pittier and R. montana Pittier of the tribe Macadamieae and Orites myrtoidea (P. & E.) B. & H. ex Sleumer of the tribe Oriteae. Many of the structural characters are common for the family, only a few of them are for the tribes, and in a variable manner for the genera. Lomatia, exhibits peculiar features that allow to differenciate the species quite easily, whereas in Roupala the species are very much alike with few specific differences. The sclereids may vary considerably in their type, distribution and orientation in species of the same genera, or on the contrary, they may be very similar in species that belong to different genera; in Roupala the sclereids are of the same kind with the same distribution but with a different orientation. Orites myrtoidea presents many exceptions to the structural generalities displayed by the subfamily as well as more pronounced xerophitic features.
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