Prev Taxon: Genus Bulbophyllum section Piestobulbon
Current Genus: Genus Bulbophyllum section Polymeres
Next Taxon: Genus Bulbophyllum section Schistopetalum
Bulbophyllum rinkei
Bulbophyllum rinkei Thoerle & W.A.Phillips, Phytotaxa 425, 3 (2019) 190, fig. 1-2
Type: Thoerle 342, cultivated by W. A. Phillips (holo US ).
Synonyms:
Epiphyte. Plant creeping. Roots spreading . Rhizome sprouting from a node below the pseudobulb, not fused with the pseudobulbs, 0.08–0.15 cm diam.; rhizome scales chartaceous, persistent. Pseudobulbs close together, obliquely erect, 1-leaved, ovoid, 0.8–1.2 by 0.3–0.4 cm, slightly angular. Leaf coriaceous; petiole c. 0.1 cm long; blade narrowly elliptic, 1.8–3 by 0.4–0.6 cm, index 4.5–5, with acute, minutely retuse apex. Inflorescence solitary, 1-flowered, 4.2–7.5 cm long; peduncle 3–6.3 cm long; scale leaves 4; floral bract infundibular, c. 0.2 cm long. Pedicel and ovary 0.75–1.2 cm long; pedicel 0.04 cm diam., basal node 0.075 cm above the floral bract attachment; ovary sulcate. Median sepal free, slightly recurved, elliptic, 0.5–0.55 by 0.26–0.28 cm, index 1.8–2; subobtuse; margins entire; apex thickened; glabrous, 3-nerved. Lateral sepals slightly recurved, connate for c. 0.1 cm, obliquely oblong-ovate, 0.55–0.6 by 0.3 cm, index 1.8–2; margins entire; margins entire; apex subobtuse, shortly apiculate, thickened; glabrous, 3-nerved. Petals porrect, spatulate, 0.22 by 0.15 cm, index 1.5; margins entire; apex broadly rounded; glabrous, 1-nerved. Lip hinged, c. 1/4 from the base recurved, 3-lobed, in outline oblong, c. 0.35–0.4 by 0.25 cm, index 1.4–1.6 (with lateral lobes spread c. 0.35 cm wide); hypochile lateral lobes large erect, broadly oblong, along the margin minutely papillose, in front broadly rounded, with 2 converging, glabrous keels in the basal half of the hypochile; epichile oblong, glabrous, with swollen margins around an ovate glabrous cavity, with entire margins and rounded apex. Column including stelidia 0.13 cm long; column foot about linear; stigma subcircular; stelidia porrect, curved upward, deltoid, c. 0.5 mm long, obtuse, with an obtuse triangular tooth on the upper margin; anther and pollinia not seen.
(After Thoerle & Phillips, 2019)
Sepals dull yellow-green spotted with dark red, the back with dark red along the nerves. Petals dull yellow-green, the back spotted with dark red and dark red along the nerves abaxially. Lip yellow spotted with dark red, heavily so on the lateral lobes, sparsely on the midlobe. Column yellow-green, streaked and mottled with dark red
Not recorded
Malesia (New Guinea), not confirmed.
Said to be from Papua New Guinea; see map
Not recorded
May
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Dendrobieae
- Subtribe Bulbophyllinae
- Genus Bulbophyllum
- Section Polymeres
- Species Bulbophyllum rinkei
Bulbophyllum rinkei Thoerle & W.APhillips was assigned to Bulbophyllum section Monanthaparva and compared with Bulbophyllum. pterostele Verm., O'Byrne & Lamb. Vermeulen, based on inspecting the drawings and photographs, consider this a species of Bulbophyllum sect. Polymeres.
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Bulbophyllum rinkei
Bulbophyllum rinkei Thoerle & W.A.Phillips, flowers, photo B. Rinke in Phytotaxa 425, 3 (2019) 192 fig. 2b
Bulbophyllum rinkei
Bulbophyllum rinkei Thoerle & W.A.Phillips, flowers, photo B. Rinke in Phytotaxa 425, 3 (2019) 192 fig. 2a
Bulbophyllum rinkei
Bulbophyllum rinkei Thoerle & W.A.Phillips, plant habit and flower analysis, drawing by Lisa Thoerle in Phytotaxa 425, 3 (2019) 191 fig. 1