Eugenia tchambaensis J.W. Dawson &amp; N. Snow, spec. nova
Creators: name: Snow, Neil
name: Dawson, John W.
name: Callmander, Martin W.
name: Kanchi Gandhi
name: Munzinge, Jérôme
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Myrtales
Myrtaceae
Eugenia
Eugenia tchambaensis

description: <i>Eugenia tchambaensis</i> J.W. Dawson &amp; N. Snow, <b>spec. nova</b> (Fig. 1, 5). <b>Typus:</b> <b>New CaledoNia. Prov. Nord:</b> Haute vallée de la Tchamba, 350 m, 16.V.1984, <i>Veillon 5691</i> (holo-: P [P04722505]!; iso-: NOU [NOU 031551]!, MPU [MPU026760]). <i>Differing from congeneric species in New Caledonia by relatively long, thin, often erect pedicels, relatively short sessile leaves</i>, <i>and distinctly raised midrib of the adaxial leaf surface</i>. <i>Shrubs</i> 1.3-4 meters. <i>Branchlets</i> glabrous, laterally compressed on emergence, becoming terete. <i>Leaves</i> sessile and clasping stem, coriaceous, venation brochidodromous, glabrous, discolorous, surfaces matte, evenly distributed along branchlets. Foliar colleters absent. <i>Leaf blades</i> (2.0-)4.0-11.4 X (1.3-)2.8- 6.0 cm, elliptic, base cordate and slightly conduplicate basally, apex obtuse, margin flat but surface irregularly sinuous; adaxial surface glabrous, eglandular or faintly glandular (use magnification), midvein raised in lower half of blade and sometimes nearly to the apex; abaxial surface glabrous, eglandular, secondary veins indistinct, intramarginal vein indistinct, 0.5- 1.5 mm from margin at midpoint of blade. <i>Inflorescences</i> terminal, axillary, or occasionally ramiflorous, flowers solitary flowers or occasionally in fascicles. Pedicels (14-) 20-45 mm, narrow (&lt;1 mm wide) but rigid, glabrous, densely glandular, often steeply ascending to nearly erect. <i>Bracteoles</i> 1-1.5 mm, narrowly triangular to triangular, glabrous, glandular, rigid, typically reflexed at 90° angle, persistent in fruit. <i>Hypanthium</i> ca. 2 mm long, cupuliform, glabrous, densely glandular. <i>Calyx lobes</i> 4, 1- 2 mm initially but tearing radially during anthesis and becoming up to 5 mm, broadly rounded, glabrous above and below. <i>Petals</i> 4, 3.5- 5 X 3-4 mm, oblate, minutely ciliate on margin, whitish, glandular. <i>Stamens</i> ca. 75-100, multiseriate. Filaments length unknown; anthers 0.5-0.7 mm, globular to sub-ellipsoid, subbasifixed, eglandular. <i>Styles</i> 3-4 mm, glabrous, narrowly capitate. <i>Fruit</i> 9- 17 X 14-20 mm, subglobose to subcylindrical, rounded or sometimes asymmetrical at base, glabrous, densely glandular (glands small), green (fresh) turning nearly black when dried. <i>Distribution and ecology. ‒</i> Known from Tchamba, and vicinity from 350 to ca. 500 meters in humid forest over schistes or graywackes (Fig. 2). Flowering confirmed for January, fruiting January through July. <i>Conservation status. ‒</i> The AOO and EOO is estimated to be 16 km 2 with two locations (Haute-Tchamba and ridge between Haute-Monéo and Mou), none in a protected area. Logging is no longer active in that area, <i>E. tchambaensis</i> is therefore assigned a preliminary IUCN conservation status of “Vulnerable” [VUD 2]. <i>Notes. ‒</i> The relatively short sessile leaves with distinctly raised upper midribs and relatively long, thin, and often erect pedicels collectively are diagnostic. The MacKee specimen occurs at higher elevations (“ 600-700 m ”) and has shorter leaves than the other specimens, but it otherwise accords in all other features. <i>Paratypi. ‒</i> <b>New CaledoNia. Prov. Nord:</b> Vallée de la Tchamba, 21°00’20’’S, 165°14’02’’E, 520 m, 13.I.2009, <i>Barrabé et al. 834</i> (NOU [NOU033931], P [P04681808]); Upper Tchamba River valley, Pondië forest, along road to Wâo Uni, 21°00’25’’S 165°14’27’’E, 500 m, 27.IV.2002, <i>Lowry et al. 5684</i> (MO, P [P04884671]); Ponerihouen, crête entre Haute Mou et Haute Monéo, 21.VI.1973, <i>MacKee 26836</i> (P [P04722504]); Haute Tchamba, 21°00’18’’S 165°13’53’’E, 17.VII.2004, <i>Munzinger et al. 2244</i> (NOU [NOU006487], P [P 04884649]).
description: Published as part of <i>Neil Snow, John W. Dawson, Martin W. Callmander, Kanchi Gandhi &amp; Jérôme Munzinge, 2016, New Species, New Combinations, and Lectotypifications in New Caledonian Eugenia L. (Myrtaceae), pp. 67-81 in Candollea 71 (1)</i> on pages 74-76, DOI: 10.15553/c2016v711a9, http://zenodo.org/record/168255