Scatena & Segecin 2005 (Article) Tillandsia, scapes

Anatomy of Tillandsia L. (Bromeliaceae) scapes from the "Campos Gerais" of Paraná, Brazil

Author(s):—V. Scatena & S. Segecin

Publication:—Rev. Bras. Bot. 27 : 515-525. (2005) — DOI

Abstract:—The anatomy of Tillandsia crocata (E. Morren) Baker, T. gardneri Lindl., T. geminiflora Brongn., T. linearis Vell., T. lorentziana Griseb., T. mallemontii Glaziou ex Mez, T. recurvata L., T. streptocarpa Baker, T. stricta Soland ex Sims, T. tenuifolia L., and Tillandsia sp. scapes were studied. They occur in the "Campos Gerais", state of Paraná, southern Brazil. They are epiphytics on trunks or rock slopes. Scapes are both bent or straight revested by bracts and they grow up from the center of the foliar rosette. There are two patterns of distribution concerning the vascular bundles, one of them the peripherical bundles are condensed in the vascular cilyndre surrounded and/or immersed in a sclerotic cilyndre, the pericycle. The other presents vascular bundles scattered but concentred on the vascular cylindre periphery, total or partially involved in a fibrous sheath without a sclerotic cylinder. Most of these species presents scapes with thickened wall hypodermic and epidermic cells, and colateral vascular bundles that are total ou partially involved by fibers. The presence of thickened wall cells, hypodermis, raphids idioblasts, mucilage and air channel are adaptatives characters related to the epiphytic habit. The kind of thickness of the epidermic cells, hypodermis and pericycle; the distribution of vascular bundles, and the presence of composite vascular bundles could help species delimitation into the genus. It is presented a identification key of Tillandsia to the anatomic features of the scape.

Keywords:—anatomy; Bromeliaceae; scape; Tillandsia