Palynological analysis ofCheilanthesSpecies (Adiantaceae-Pteridophyta) of Northwestern Argentina

Autor:	Irma G. Michelena, Marta A. Morbelli
Rok vydání:	1989
Předmět:	Palynology Reticulate biology Botany Lamella (mycology) Pilosa Cheilanthes Plant Science Adiantaceae Interspecific competition biology.organism_classification Ecology Evolution Behavior and Systematics Spore
Zdroj:	Grana. 28:295-304
ISSN:	1651-2049 0017-3134
DOI:	10.1080/00173138909427442
Popis:	The spores of seven Cheilanthes Sw. species that grow in the Northwest Region of Argentina were studied with LM, SEM and TEM. They were: Cheilanthes marginala H. B. K., C. micropteris Sw., C. myriophylla Desv., C. notholaenoides (Desv.) Weath., C. pilosa Gold., C. poeppigiana Mett. ex Kuhn, and C. pruinata Kaulf. C. volcanensis de la Sota, mentioned for the region, was not included because all the collected material was sterile or immature. The equatorial diameter is not useful in distinguishing species because of the interspecific variability of such species as C. micropteris, C. poeppigiana and C. pruinata. In other cases interspecific variation overlaps. All the species analysed here have one basic pattern of structure: a homogeneous, smooth exospore and a sculptured perispore. The perispore has two layers: an innermost one, granular, compact and an outermost one, reticulate with or without an outer lamella. The outermost layer constitutes the greatest part of the perispore. Five sculpture gro...
Databáze:	OpenAIRE
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