Bulbophyllum stagmatoglossum J. J. Verm., Schuit. &amp; de Vogel, sp. nov.
Creators: name: Vermeulen, Jaap J.
name: Schuiteman, André
name: De Vogel, Edward F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Bulbophyllum
Bulbophyllum stagmatoglossum

description: <i>Bulbophyllum stagmatoglossum</i> J.J.Verm., Schuit. &amp; de Vogel, <i>sp. nov.</i> (Fig. 8) TYPE: Indonesia, Papua Province, 9 km Northeast of Lake Habbema, 2800 m alt., October 1938, <i>Brass 10538</i> (holotype AMES!). DIAGNOSIS. Most similar to <i>Bulbophyllum exilipes</i> Schltr., differs by the ovate petals (versus broadly ovate and distinctly attenuated half-way their length), the upwards falcate (versus downwards falcate) stelidia, and the papillose (versus glabrous) ridges on the adaxial side of the lip. Rather small epiphyte with creeping rhizomes and spreading roots. <i>Rhizome</i> 2.0–3.0 mm diam., sections between pseudobulbs 0.2–0.9 cm long, arising from the basal node of the pseudobulb; rhizome scales thin, little persistent. <i>Pseudobulbs</i> distinct, ovoid, 0.6–2.0 × 0.3–0.6 cm, (?)angular. <i>Leaf</i>: petiole 5–9 mm long; blade elliptic(-oblong) to obovate(-oblong), 2.9–8.0 × 0.4–1.0 cm, ratio length/width 6.4–13.7; obtuse. <i>Inflorescences</i> single or few together, 10–11 cm long, 1-flowered. Peduncle 5.5–6.0 cm long, scales ca. 3. <i>Floral bracts</i> ca. 5 mm long. <i>Flowers</i>: pedicel plus ovary ca. 3.8 cm long, basal node ca. 3 mm above the floral bract attachment. <i>Median sepal</i> free, recurved, ovate, 5.8–9.5 × 2.3–3.2 mm, ratio length/width 2.5–3.0; acute, margins entire, minutely papillose; glabrous, 3-veined. <i>Lateral sepals</i> as the median, but triangular, 5.9–12.5 × 2.4–3.5 mm, ratio length/width 2.4–3.6, margins glabrous. <i>Petals</i> porrect, ovate, 3.0– 4.0 × 1.5–1.8 mm, ratio length/width 2.0–2.3; rounded, margins minutely erose, papillose to ciliolate, surface glabrous; 1-veined. <i>Lip</i> approx. straight, proximally ovate, tapering into a narrow, oblong apical part with a slightly thickened apex, 5.0–6.5 × 1.6–1.7 mm, ratio length/width 3.1–3.9 (without spreading); rounded, margins entire, hirsute proximally, glabrous distally; thick; adaxially concave proximally and with two converging, distinct, rounded, distinctly papillose ridges which grade into the convex distal part at about 2/5–1/2 of the length of the lip, also with two much shorter, converging ridges close to the base, adaxial surface otherwise glabrous; abaxially with a deep median furrow from base to apex, otherwise convex and densely hirsute proximally, slightly concave and glabrous elsewhere. <i>Column</i> including stelidia 1.9–2.0 mm long, stigma narrowly obovate, foot distinctly widened, with patent, obtuse lateral teeth. Stelidia upwards falcate, narrowly triangular, subulate distally, 0.8–0.9 mm long, acute. Pollinia 4. COLOURS: sepals and petals pale purple with darker specklings. Lip yellow, apex purple. ETYMOLOGY: <i>stagma</i> (Greek) = drop, <i>glossa</i> (Greek) tongue, referring to the outline of the lip. HABITAT AND ECOLOGY: tufted on mossy trees. Elevation 2800—2900 m.
description: Published as part of <i>Vermeulen, Jaap J., Schuiteman, André &amp; De Vogel, Edward F., 2020, Sixteen new species of Bulbophyllum section Polymeres (Orchidaceae) from New Guinea, pp. 301-330 in Lankesteriana 20 (3)</i> on pages 312-315, DOI: 10.15517/lank.v20i3.44438, http://zenodo.org/record/4455665