The genera Polygonum and Bilderdykia (Polygonaceae) in southern Africa: morphology and taxonomic value of the ocrea and fruit

The external morphology of the fruit and the ocrea of 16 taxa of Polygonum and Bilderdykia in southern Africa was studied.Fruits are either lenticular or trigonous. Six types of fruit surfaces were distinguished. Five types of ocreae were found, characterized by: a green undulating limb; a silvery h...

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Bibliographic Details
Published inBothalia Vol. 19; no. 2; pp. 175 - 178
Main Authors G. Germishuizen, P. J. Robbertse, P. D. F. Kok
Format Journal Article
LanguageEnglish
Published South African National Biodiversity Institut 19.12.1989
Subjects
Bilderdykia
fruits
key
morphology
ocrea. Polygonum
taxonomy
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Summary:The external morphology of the fruit and the ocrea of 16 taxa of Polygonum and Bilderdykia in southern Africa was studied.Fruits are either lenticular or trigonous. Six types of fruit surfaces were distinguished. Five types of ocreae were found, characterized by: a green undulating limb; a silvery hyaline sheath; a brown tubular sheath without terminal hairs; a terminal fringe of short cilia or setae; and a bristly hairy sheath fringed with long rigid setae.
ISSN:0006-8241
2311-9284
DOI:10.4102/abc.v19i2.956