Kibara renneriae Takeuchi 2012, sp. nov.
Creators: name: Takeuchi, Wayne
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Laurales
Monimiaceae
Kibara
Kibara renneriae

description: <i>Kibara renneriae</i> Takeuchi, <i>sp. nov.</i> (Fig. 4) <i>Haec species Kibarae archboldianae affinis sed a qua ramulis teretibus (nec nodos incrassato-clavatis intus formicas hospitantibus), floribus femineis pedicellis nec carinatibus, drupis ovoideis (nec oblongo-ellipsoideis) ca. 18 × 15 mm differt.</i> <b>Type:</b> — PAPUA NEW GUINEA. Gulf Province: Lakekamu, near streambed of the Eloa River, upstream of the expedition base camp (Ivimka), alluvial forest, 7°44'S, 146°29.5'E, 105 m, 2 November 1996, <i>Takeuchi &amp; Kulang 11533</i> (holotype LAE!; isotypes A!, CANB!, K!, L!, UPNG!). Shrubs or small trees, 4–5 m tall. <i>Branchlets</i> terete (or apically compressed), 2.5–4 mm diameter, straight; surfaces laxly puberulent when immature, glabrescent, lineate (or smooth), yellowish-green to straw, without lenticels; internodes 4–14 cm long. <i>Leaves</i> opposite, equal, exstipulate; petioles 10–17 × 1–3 mm, channelled on upper side, longitudinally rugulose, glabrescent; leaf-blades chartaceous-papery, elliptic-oblong, 15.8–32 × 6.5–12.5 cm, base cuneate (or obtuse), margin entire (or denticulate), obscurely revolute, apex 1–2.2 cm acuminate; surfaces usually dull, glabrous or nearly so, adaxially olivaceous, abaxially tawny; venation brochidodromous, midrib adaxially flat to prominulous, abaxially prominent, secondary veins 6–12 per side, (0.5–) 1.5–5 cm apart, at the lamina center straight-diverging 60–75° from the midrib, supramedially arcuate, closing by abruptly looping nerves (2–)4–8(–10) mm from margins, anastomosing beyond the loops, with or without a second inframarginal set of commissural nerves parallel to the first, partial intersecondary veins usually present between the main laterals; reticulum conspicuous, irregular, finely areolate, nervules distinctly raised on both sides. <i>Inflorescence</i> axillary, monochasial or a racemiform dichasium, 2–4 × 2–3 cm, 1–4 together, strigulose; bracts inserted at the peduncle base and the nodes above, scalelike, ovate-deltate, 0.5–1 × 0.3–0.8 mm, persisting at anthesis, spreading, densely adpressed-hairy. <i>Male flowers</i> not seen. <i>Female flower</i> s (1–)3–6 per inflorescence; pedicel (6–)10–18 × 0.3–0.8 mm, widest at the top, filiform, not articulate; receptacle ellipsoid-obovoid, 3–3.5 × 2.3–2.5 mm at anthesis, 4.5–5 × 3.5–4.5 mm when abscissing, splitting near the middle, internal surfaces densely hirtellous; bracteoles 0–2, rotund, 0.1–0.2 × 0.3–0.7 mm, inserted within 1 mm of the ostiole; tepals 4 in 2 decussate pairs, obtuse, imbricate, medially swollen-glanduliferous, outermost tepals the largest, 0.3–0.5 × 0.5–1 mm; carpels 15–22, conoid-columnar, 1–1.3 × 0.2–0.4 mm, sessile, hirtellous; styles absent; stigmas rounded or acute, connivent, their apices occluding the orifice below the tepals. <i>Infructescence</i> of single receptacles from foliate axils; pedicels vasiform, 9–11 × 1–3 mm, round in cross-section (not carinate), dull orange-brown; receptacle discoid or globular, 5.5–7.5 mm across, accrescent; fruiting monocarps ovoid, ca. 18 × 15 mm, crustaceous, black, seated on ca. 1.5 × 2.5 mm cylindriform knobs. <b>Etymology:</b> — <i>Kibara renneriae</i> is named after systematist Susanne S. Renner (Ludwig Maximilian University of Munich), a specialist in Melastomataceae and Monimiaceae. <b>Field characters:</b> —Outer bark brown, wood light brown; branchlets shining green, often covered with a sooty mold, not ant-inhabited; leaves papyraceous, ± bullate, adaxially very dark green, abaxially yellowgreen (glaucescent when young); flowers dull yellow; fruiting monocarps purple-black. <b>Distribution:</b> —Known from two lowland localities in the Gulf Province of PNG (Fig. 3: B–C). <b>Habitat and ecology:</b> —Perhumid alluvial forest, 105–250 m elevation. <b>Phenology:</b> —Flowering in November; fruiting in August. <b>Additional specimen examined:</b> — PAPUA NEW GUINEA. Gulf District: Kikori Subdistrict, Purari River, Wabo Dam site, small gully, 7°00'S, 145°10'E, 250 m, 18 August 1975, <i>Conn, Pattison, Sands &amp; Wood LAE 66299</i> (L, LAE!). The staminate inflorescence of <i>Kibara renneriae</i> is unknown, but the generic assignment is clear from the vegetative and pistillate characters enumerated in Philipson (1984: 482). The most significant of these applies to the pedicels, which in <i>Kibara</i> Endlicher (1837: 314) are distally expanded and not articulated at the receptacle. In the genus most likely to be confused with <i>Kibara</i> [viz., <i>Steganthera</i> Perkins (1898: 564)] the pedicels are jointed at the top and not dilated. Although <i>Kibara</i> is also similar to <i>Wilkiea</i> Mueller (1858: 64), the new species (having a sessile stigma) cannot be assigned to that genus because <i>Wilkiea</i> has a distinctly elongate style (Philipson 1985: 390, 1986: 282–283). Even if future adjustments are imposed within the Mollinedioideae, <i>Kibara</i> is still the oldest name within the <i>Kairoa-Kibara-Wilkiea</i> clade. Under any likely scenario, the proposed binomial should be immune from nomenclatural disturbance. <i>Kibara renneriae</i> was formerly assigned to <i>K. archboldiana</i> Smith (1941: 240) but this interpretation is no longer plausible (see discussion of <i>K. archboldiana</i>, next section). The two species are easily separated by the characters specified in the preceding diagnosis.
description: Published as part of <i>Takeuchi, Wayne, 2012, Additions to the flora of the southern mountains of Papua New Guinea: Begonia chambersiae sp. nov. (Begoniaceae), Kibara renneriae sp. nov. (Monimiaceae), and distributional records of four rarely seen taxa, pp. 43-53 in Phytotaxa 52 (1)</i> on pages 47-48, DOI: 10.11646/phytotaxa.52.1.6, http://zenodo.org/record/5060862
description: {"references": ["Philipson, W. R. (1984) A synopsis of the Malesian species of Steganthera (Monimiaceae). Blumea 29: 481 - 497.", "Endlicher, S. F. L. (1837) Classis XXVII, Ordo CV. Monimiaceae. In: Genera Plantarum Secundum Ordines Naturales Disposita. F. Beck, Vienna, pp. 313 - 315.", "Perkins, J. R. (1898) Beitrage zur Kenntnis der Monimiaceae, I. Uber die Gliederung der Gattungen der Mollinedieae. Botanische Jahrbucher 25: 547 - 577.", "Mueller, F. J. H. von (1858) X. Account of some new Australian plants. Transactions of the Philosophical Institute of Victoria 2: 62 - 77.", "Philipson, W. R. (1985) A synopsis of the Malesian species of Kibara (Monimiaceae). Blumea 30: 389 - 415.", "Philipson, W. R. (1986) Monimiaceae. In: Flora Malesiana, Series I, 10 (2). Kluwer Academic Publishers, Dordrecht, pp. 255 - 326.", "Smith, A. C. (1941) Studies of Papuasian plants, II. Journal of the Arnold Arboretum 22: 231 - 252."]}