Bulbophyllum lipochilum 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 lipochilum

description: <i>Bulbophyllum lipochilum</i> J.J.Verm., Schuit. &amp; de Vogel, <i>sp. nov.</i> (Fig. 14, 18C) TYPE: Papua New Guinea, Central Province, Woitape, Mt. Alio South facing slope, at the North end of the valley, 2100 m alt., <i>De Vogel &amp; Vogel (2002) s.n., L alca. 18379 (holotype L!, spirit material)</i>. DIAGNOSIS. Most similar to <i>Bulbophyllum chaunobulbon</i> Schltr., with which it shares the scale-covered rhizome, the lax arrangement of the pseudobulbs and the glabrous lip. It differs by having wider petals (ratio length/width 1.4–1.5, versus 1.7–3.0), by the ovate lip with a drawn-out apex (versus oblong), and by the approx. porrect (versus sigmoid) stelidia. Rather large epiphyte with pendulous, branched rhizomes to 50 cm long, some roots growing over the rhizome towards its base, others spreading. <i>Rhizome</i> 1.8–2.2 mm diam., sections between pseudobulbs 0.6–2.5 cm long, arising from the basal node of the pseudobulb; rhizome scales thin, little persistent. <i>Pseudobulbs</i> distinct, cylindrical-ovoid, 13–42 × 2.5–3.2 mm, hardly angular. <i>Leaf</i>: petiole 1.5–2.5 mm long; blade ovate, 32–72 × 3.5–5.5 mm, ratio length/ width 9.1–13.1; acute. <i>Inflorescences</i> single or a few together, ca. 3.5 cm long, 1-flowered. Peduncle 1.3– 3.1 cm long, scales 3. <i>Floral bracts</i> 3.5–4.0 mm long. <i>Flowers</i>: pedicel plus ovary 8.0–10.0 mm long, basal node 1.5–3.0 mm above the floral bract attachment. <i>Median sepal</i> free, recurved, ovate-triangular, ca. 13.5 × 2.4 mm, ratio length/width 5.6–5.7; acuteacuminate, margins entire, minutely papillose, surface glabrous; 5-veined. <i>Lateral sepals</i> as the median but falcate, triangular, ca. 13.8 × 4.0 mm, ratio length/ width 3.4–3.5, margins glabrous. <i>Petals</i> porrect, ovate, ca. 5.2 × 3.5 mm, ratio length/width 1.4–1.5; acuminate, upper margin entire, glabrous, lower somewhat erose, densely papillose-ciliolate, surface glabrous; 1-veined. <i>Lip</i> recurved near the base, ovate with drawn-out apex, ca. 11.2 × 1.8 mm, ratio length/ width 6.2–6.3 (without spreading); obtuse, margins entire, glabrous; very thick; adaxially concave close to the base and with two short, narrow ridges which start near the margins and then converge, leaving a wide gap in between, surface elsewhere convex, abaxially with a median furrow which is deep in the basal half, shallow elsewhere. <i>Column</i> including stelidia ca. 2.4 mm long, stigma narrowly obovate with slightly protruding base, foot distally widening. Stelidia approx. porrect, narrowly triangular, ca. 1.1 mm long, acute, upper and lower margin with a slight, deltoid, obtuse tooth. <i>Pollinia</i> 4, the inner more than half as long as the outer. COLOURS: tepals pale yellow-ochre, veins dull red, petals with a few blackish dots along the upper margin. Lip glossy, orange-yellow, proximally red, distally white. ETYMOLOGY: <i>lipos</i> (Greek) = grease, <i>cheilos</i> (Greek) lip, referring to the shiny lip surface. HABITAT AND ECOLOGY: not recorded. Elevation 2200 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 page 322, DOI: 10.15517/lank.v20i3.44438, http://zenodo.org/record/4455665