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Full-Text Articles in Plant Sciences
Comparative Anatomical Studies In Danthonia Sensu Lato (Danthonieae: Poaceae), Kay L. Tomlinson
Comparative Anatomical Studies In Danthonia Sensu Lato (Danthonieae: Poaceae), Kay L. Tomlinson
Aliso: A Journal of Systematic and Floristic Botany
Leaf anatomy and lodicule micromorphology were examined for representative species of Danthonia, 12 of its segregate genera, Cortaderia, and Schismus. Major conclusions are: 1) Generic status for the segregates Centropodia, Dregeochloa, Monachather, and Pseudopentameris is supported; these genera appear isolated in the Danthonieae. 2) Rytidosperma appears to be distinct from Danthonia s.s., and from Chionochloa. 3) Suggested close relationships between Merxmuellera and Chionochloa, and between Chionochloa and Cortaderia, are not supported. 4) Karroochloa and Schismus appear to be closely related. 5) Danthonia cachemyriana and D. exilis may be more closely related to Karroochloa than to Danthonia s.s.
Morphology And Anatomy Of Foliar Nectaries And Associated Leaves In Mallotus (Euphorbiaceae), Thomas S. Elias, Sun An-Ci
Morphology And Anatomy Of Foliar Nectaries And Associated Leaves In Mallotus (Euphorbiaceae), Thomas S. Elias, Sun An-Ci
Aliso: A Journal of Systematic and Floristic Botany
The morphology and anatomy of the foliar nectaries and associated leaves offour species of Mallotus (Euphorbiaceae) were studied. Light microscopic observations of paraffin- and plastic-embedded specimens were complemented with scanning electron micrographs. Leaf anatomy of the four species is typical of large mesophytic plants. Aattened foliar nectaries are shown to be composed of specialized epidermal cells. The nonvascularized nectaries consist of narrow columnar cells each with a large nucleus, numerous vacuoles, and dense cytoplasm. Subglandular parenchyma cells have more pronounced nuclei, more vacuoles and denser cytoplasm than do typical laminar parenchyma. Structurally, these nectaries are similar to those found in …