Polystachya danielana G.W.Hu, W.C.Huang & Q.F.Wang, 2019
publication ID |
https://doi.org/ 10.11646/phytotaxa.405.4.3 |
DOI |
https://doi.org/10.5281/zenodo.13715562 |
persistent identifier |
https://treatment.plazi.org/id/039E87A2-C555-FFAE-FF0F-3557C5EBEDCB |
treatment provided by |
Felipe |
scientific name |
Polystachya danielana G.W.Hu, W.C.Huang & Q.F.Wang |
status |
sp. nov. |
Polystachya danielana G.W.Hu, W.C.Huang & Q.F.Wang , sp. nov. ( Figs. 2 View FIGURE 2 , 3 View FIGURE 3 )
Type :— KENYA. Elgeyo-Marakwet County: Kipkunur , Kapsowar town , Cherangani Hill, 00° 58 ′ 49.48 ″ N, 35° 30 ′ 31.25 ″ E, 2670 m, 2 May 2018, Sino-Africa Joint Investigation Team ( SAJIT)-007105 (holotype HIB!; isotype EA!, HIB!) GoogleMaps .
Epiphytic herbs, ca. 13 cm tall. Roots numerous, up to 13 cm long, ca. 3 mm thick. Pseudobulbs (stems) narrowly cylindrical or rarely swollen in the lower middle part, 2.0–3.0 × 0.6 cm, mostly arising from the nodes near the base of the previous growth, few from the middle or upper nodes, with 3–5 sheaths. Leaves 2, narrowly oblong or narrowly ovate-lanceolate, 2–8 × 1–2 cm, base gradually tapered into a petiole, apex obtuse or unequally shallowly bilobed. Inflorescences terminal, 2–5 cm long, with 4–7 flowers, peduncle tomentose, unbranched. Flowers purple to yellowgreen; bracts oblong, 4 × 3 mm, apex emarginate with a caudate tip; pedicel and ovary 1.0– 1.5 cm long, purple, tomentose. Dorsal sepals subovate, 5.0–7.0 × 3.0– 4.5 mm, apex acuminate; lateral sepals obliquely ovate-orbicular, apex recurved, 7–9 × 4–6 mm, abaxially tomentose, borne on a ca. 6 mm long column foot and forming a sac; petals oblong, 5.0–6.0 × 1.5–2.0 mm, apex blunt; lip 8 × 5 mm, recurved, hypochile hairy, mesochile hairy, epichile trilobed, lateral lobes incurved, oval, midlobe orbicular, 3.5 × 3.5 mm, margin undulate and irregularly erose, apex blunt; column 2.5 mm long. Capsule trigonal-ellipsoid, 2.7 cm long.
Distribution and ecology:— Currently known only from the type locality, as an epiphytic herb growing in moss on lower parts of trunks of Podocarpus milanjianus Rendle (1894: 61) .
Phenology:— Flowering in May.
Etymology:— Named in memory of Daniel Odhiambo Miyawa, a botanist from the National Museums of Kenya, who spent his brief life studying Kenyan orchids.
Additional s pecimens examined:— Polystachya spatella : KENYA. Nandi County: North Nandi Forest, Tabolwa , 24 April 2018, SAJIT-007027 ( EA, HIB). Elgeyo-Marakwet County: Kapsowar, Kipkunur, 2 May 2018, SAJIT-007103 ( EA, HIB) ; Kararia , 4 May 2018, SAJIT-007128 ( EA, HIB). DEMOCRATIC REPUBLIC OF THE CONGO. 12 April 1934, Witte 1501 ( BR) ; May 1894, Scott Elliot 7796 ( K). RWANDA. 1 March 1992, Delepierre 135 ( BR). Polystachya kermesina : RWANDA. 27 December 1971, Bouxin 1273 ( BR). DEMOCRATIC REPUBLIC OF THE CONGO. 1 November 1937, Lebrun 8719 ( BR) ; 1 July 1959, Léonard. 4774 ( YBI) ; 2 June 1959, Léonard 4475 ( YBI) ; 6 February 1958, Léonard 436 ( BR) ; 5 February 1958, Léonard 404 ( YBI) ; 26 January 1945, Germain 3477 ( YBI) ; 28 December 1930, Burtt 3084 ( BR) ; 1 November 1937, Lebrun 8719 ( BR) ; 7 August 1937, Louis 5271 ( YBI) .
Phylogenetic analysis:— Bayesian phylogenetic analyses of the combined ITS and psbD-trnT dataset shows that Polystachya danielana is a member of the clade of P. sect. Superpositae Kraenzlin (1926: 100) and is closely related to P. spatella and P. kermesina ( Fig. 1 View FIGURE 1 ). This confirms its position in P. sect. Superpositae. The separate analyses did not exhibit any strong incongruence.
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