Keywords
morphology
Hypoxis
Hypoxidaceae
East Africa
How to Cite
Number of views: 205
Number of downloads: 39
Abstract
Morphology and types of the seed testa sculpture in the East African taxa of the genus Hypoxis were investigated. Studies have revealed that there are 9 types of the seed testa sculpture in the East Tropical Africa. Distribution of types of seed testa sculpture is unequal among the taxa studied. Some are wide spread and some confined to a single species or variety. Morphology of the seed testa sculpture is a useful taxonomic character for determination of taxa of the genus Hypoxis in the East Africa.
Funding
Support of this study by a grant from the Polish Science Committee is gratefully acknowledged (Project no. 3P04C04224). Fieldwork was possible thanks to a grant from The National Geographic Society # 6891-00.
References
BAKER J. G. 1878. A Synopsis of Hypoxidaceae. J. Linn. Soc., Bot. 17: 93-126. DOI: https://doi.org/10.1111/j.1095-8339.1878.tb01247.x
BARTHLOTT W. 1981. Epidermal and seed surface characters of plants: Systematicapplicability and some evolutionary aspects. Nordic. J. Bot. 1: 345-355. DOI: https://doi.org/10.1111/j.1756-1051.1981.tb00704.x
BRACKETT A. 1923. Revision of the American Species of Hypoxis. Contr. Gray Herb. 69: 120-147. DOI: https://doi.org/10.5962/p.336053
GEERINCK D. J. L. 1969. Genera des Haemodoraceae et des Hypoxidaceae. Bull. Jard. Bot. État. 39: 66-82. DOI: https://doi.org/10.2307/3667654
HOLMGREN P. K., HOLMGREN N. H. & BAENETT L. C. 1990. Index Herbariorum I. Regnum Vegetabile 120. 693 pp. N.Y. Bot. Garden. New York.
NEL G. 1914. Die afrikanischen Arten der Amaryllidaceae-Hypoxidae. Bot. Jahrb. Syst. 51: 287-339.
NIEMIROWICZ-DANCZENKO E. N. 1985. Hypoxidaceae. In: A. TAKHTAJAN (ed.). Anatomia Seminum Comparativa. Vol. 1, pp. 117-119. Nauka, Leningrad.
NORDAL I., LAANE M. M., HOLT E. & STAUBO I. 1985. Taxonomic studies of the genus Hypoxis in East Africa. Nordic J. Bot. 5: 15-30. DOI: https://doi.org/10.1111/j.1756-1051.1985.tb02067.x
OGANEZOVA G. G. 1995. On the systematical position of the families Haemodoraceae, Hypoxidaceae, and Taccaceae (the data on the seed structure). Bot. Zhurn. (Moscow & Leningrad) 80: 12-25.
SINGH Y. & WILAND-SZYMAŃSKA J. 2002. Systematics and phytogeography of African Hypoxis. Proceedings of the 3rd Congress of the Southern African Society for Systematic Biology, pp. 43. Grahamstown.
WILAND-SZYMAŃSKA J. 2001. The genus Hypoxis (Hypoxidaceae) in Central Africa. Ann. Missouri Bot. Gard. 88: 302-350. DOI: https://doi.org/10.2307/2666228
WILAND-SZYMAŃSKA J. & NORDAL I. 2006. Hypoxidaceae. In: Flora of Tropical East Africa, pp. 26. Royal Botanic Gardens, Kew.
WILSENACH R. 1967. Cytological observations on Hypoxis: I. Somatic chromosomes and meiosis in some Hypoxis species. J. S. African Bot. 33: 75-84. DOI: https://doi.org/10.5962/p.397770
WILSENACH R. & PAPENFUS J. N. 1967. Cytological observations on Hypoxis: II. Pollen germination, pollen tube growth and haploid chromosome numbers in some Hypoxis species. J. S. African Bot. 33: 111-116. DOI: https://doi.org/10.5962/p.397762
WILSENACH R. & WARREN J. L. 1967. Cytological observations on Hypoxis: III. Embryo-sac development in Hypoxis rooperi and H. filiformis. J. S. African Bot. 33: 133-140. DOI: https://doi.org/10.5962/p.397769
ZIMUDZI C. 1994. The Cytology and Reproduction of the Genus Hypoxis L. In: J. H. SEYANI (ed.). Proceedings of XIIIth Plenary Meeting AETFAT, 1: 535-543. National Herbarium and Botanic Gardens of Malawi, Zomba.
License
Copyright
© by Adam Mickiewicz University, Poznań, Poland, Department of Plant Taxonomy, 2006
OPEN ACCESS