Telfairia
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Taler gourd ( Telfairia pedata ), illustration of a female plant |
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Telfairia is a small genus of the cucurbit family with three species in tropical Africa. Two species are grown regionally as food crops.
features
The species are dioecious lianas that can be up to 30 meters long. They have three to sevenfold leaves and two-part tendrils . Pre-leaves are missing.
The flowers are large and purple in color. The male flowers are in multi-flowered clusters . The flower tube is short and wide, the calyx lobes serrated. The five petals are free and frayed with long threads. They have five or three stamens . At five everyone is bithek ; with three, two stamens have four counters and one has two counters. The stamens are not connected and attach to the flower tube. The counters are straight or slightly curved.
The female flowers are solitary. Their inflorescence resembles the male. The ovary is ribbed. The numerous ovules are horizontal. The scar is three-lobed.
The fruit is large, fleshy, ribbed and many-seeded. It opens with 10 longitudinal flaps. The seeds are large, broadly oval to almost round in outline, and flat. They are embedded in a fibrous endocarp sheath.
Systematics
The genus was named in 1827 by William Jackson Hooker after the Irish doctor and botanist Charles Telfair (1778-1833). In the systematics of C. Jeffrey (2005) based on morphological features , the genus is placed within the cucurbit family in the subfamily Cucurbitoideae, tribe Joliffieae, in which it forms the subtribe Telfairiinae together with Odosicyos . DNA sequence analyzes show the genus within the paraphyletic tribe Joliffeae as a sister taxon of the clade ( Ampelosicyos + Tricyclandra + Odosicyos ).
There are three species in the genus:
- Telfairia batesii Keraudren is only known from the type specimen from Cameroon .
- Telfairia occidentalis Hook.f. from tropical West Africa to the Congo Basin
- Taler gourd ( Telfairia pedata (Sims) Hook. ) In tropical East Africa from Tanzania to southern Mozambique
literature
- SA Ajayi, ME Dulloo, RS Vodouhe, P. Berjak, JI Kioko: Conservation status of Telfairia spp. in sub-Saharan Africa . In: R. Vodouhe, K. Atta-Krah, GE Achigan-Dako, O. Eyog-Matig, H. Avohou (eds.): Plant Genetic Resources and Food Security in West and Central Africa. Biodiversity International 2007, ISBN 978-92-9043-750-5 (online pdf 136 kB)
- C. Jeffrey: Telfairia , in: Flora Zambesiaca , Volume 8, 1978. (online) (characteristics)
Web links
Individual evidence
- ↑ Alexander Kocyan, Li-Bing Zhang, Hanno Schaefer, Susanne S. Renner: A multi-locus chloroplast phylogeny for the Cucurbitaceae and its implications for character evolution and classification . Molecular Phylogenetics and Evolution, Volume 44, August 2007, pp. 553-577. doi : 10.1016 / j.ympev.2006.12.022
- ↑ Art entry ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. in the African Flowering Plants Database ( memento of the original dated August 30, 2007 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. , accessed April 7, 2008.
