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| Rhipidoglossum pareense P.J.Cribb & Hemp, in Cribb & Hemp, 2022. |
Summary
Rhipidoglossum pareense, a new species, is described from the Pare mountains of NE Tanzania and compared with R. leedalii (P.J.Cribb) Farminhão & Stévart. Its habitat requirements and conservation status are assessed.
Key Words: Angraecinae, conservation status, Eastern Arc Mountains, endemic, fog water interception, montane forest
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| Rhipidoglossum pareense P.J.Cribb & Hemp. A habit; B inflorescence; C flower; D dorsal sepal; E lateral sepal; F petal; G lip; H column & lip, side view; J column & anther cap, front view; K column & anther cap, side view; L column, anther cap and pollinia removed; M anther cap, side view; N anther cap, ventral view; P pollinium. All from Hemp 7304 (type collection). Drawn by Judi Stone. |
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| Rhipidoglossum pareense P.J.Cribb & Hemp. A habit; B, C inflorescences. photos: A. Hemp. |
Rhipidoglossum pareense P.J.Cribb & Hemp sp. nov.
RECOGNITION. The allied species of Rhipidoglossum (formerly in Margelliantha) are closely related and distinguished by small but consistent differences. Rhipidoglossum pareense is most closely allied to R. leedalii (P.J.Cribb) Farminhão & Stévart which occurs in the Uluguru mountains and Southern Highlands of Tanzania but differs in having an inflorescence with up to 12 flowers (vs 4 – 8 flowers in R. leedalii), smaller flowers with a 2 – 2.8 mm long dorsal sepal (vs 3.5 – 4.5 mm), 3.5 mm long lateral sepals (vs 4 – 5 mm long), 3 – 3.2 × 2.5 – 3 mm petals (vs 4 × 3 – 3.5 mm), a broadly obovate-circular 3.5 – 5 × 4.5 mm lip (vs 5 – 5.5 × 6 – 8 mm) with a markedly erose front margin, 3.15 – 4.5 mm long spur (vs 5 – 7 mm) and shorter 5.2 – 6.8 mm long pedicel and ovary (vs 10 – 11 mm long). Figs 1 & 2.
P. J. Cribb and A. Hemp. 2022. Rhipidoglossum pareense (Orchidaceae: Epidendroideae), A New Species from Tanzania. Kew Bulletin. DOI: 10.1007/s12225-022-10027-2
https://phys.org/news/2022-08-orchid-species-mountains-tanzania.html
