Eugenia amosensis N. Snow,

Neil Snow, John W. Dawson, Martin W. Callmander, Kanchi Gandhi & Jérôme Munzinge, 2016, New Species, New Combinations, and Lectotypifications in New Caledonian Eugenia L. (Myrtaceae), Candollea 71 (1), pp. 67-81: 68-70

publication ID

http://doi.org/ 10.15553/c2016v711a9

persistent identifier

http://treatment.plazi.org/id/03CCC616-2B17-0A60-FCBE-9385FE0CC3B7

treatment provided by

Plazi

scientific name

Eugenia amosensis N. Snow
status

spec. nova

Eugenia amosensis N. Snow  , spec. nova

( Fig. 1View Fig. 1, 2View Fig. 2).

Typus: New CaledoNia. Prov. Nord: Col d’Amoss, 20°17’16’’S 164°25’42’’E, 13.XI.2002, Munzinger et al. 1488 (holo-: P [P00354503 sheet 1, P04884668 sheet 2]!; iso-: MO-5841143!; NOU [ NOU 002732]!).

Differing from congeneric species in New Caledonia by its relatively long, narrowly elliptic, sessile to subsessile leaves with cordate bases, cauliflorous inflorescence, and densely velutinous indumentum on the pedicels, hypanthium and proximal abaxial portion of the calyx lobes.

Shrubs to 3 m. Branchlets glabrous, eglandular, smooth, the epidermis soon becoming gray and flaking away. Pedicels, hypanthium and lower calyx lobes densely reddish velutinous. Leaves sessile to sub-sessile, coriaceous, venation brochidodromous, discolorous, surfaces matte, evenly distributed along branchlets. Foliar colleters absent. Leaf blades 15.5-37.7 X 5.0- 7.4 cm, narrowly elliptic, base cordate, apex acute, margin flat, secondary and tertiary veins protruding somewhat above; adaxial surface glabrous, midvein raised; abaxial surface moderately to densely glandular (use magnification), secondary and higher-order veins prominent, intramarginal vein prominent, (1.5-) 3-5 mm from margin at midpoint of blade. Inflorescences cauliflorous, ca. 2 cm long, of monads or short (5-flowered) botryoids. Pedicels 2-12 mm, rigid. Bracteoles ca. 0.5 X ca. 1.0 mm (material scant, possibly not fully expanded), hemispherical, broadly rounded apically. Hypanthium cupuliform, ca. 5 mm. Calyx lobes 4, ca. 1-2 mm, dimorphic, apex rounded, more or less glabrous above. Petals 4, 6- 7 X 6-7 mm, oblate, sparsely short-ciliate on margins. Stamens numerous (> 100), multiseriate; filaments length uncertain (material in bud); anthers ca. 0.8 mm, ellipsoid, dorsifixed, eglandular. Style ca. 6 mm (limited material), moderately short-villous in lower half, stigma narrow. Ovary bilocular, placentation axile, ovules ca. 25 per placenta, densely but irregularly placed on somewhat triangular-shaped placenta. Fruit unknown.

Distribution, ecology and phenology. ‒ Known only from the type gathering at Col d’Amos (misspelled as “d’Amoss” on the type specimen) near the northern end of Grand Terre ( Fig. 2View Fig. 2). Flowering in November, fruiting unknown.

Conservation status ‒ With a single location known outside of the protected area network in a forested area heavily fragmented and regularly damaged by anthropogenic bush fires, E. amosensis  is assigned a preliminary IUCN conservation status of “Critically Endangered” [CR B2ab(iii, v)+C2(a)+D].

Notes. ‒ Additional collections are needed to better characterize flowering and fruiting material and their seasons. The long, narrowly elliptic, sessile to subsessile cordate leaves, coupled with the cauliflorous inflorescence with dense velutinous indumentum, collectively diagnose the species among others in New Caledonia. Although a subtle character state, the villous base of the style is also atypical for most in the genus.

NOU

Institut de Recherche pour le D�veloppement

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Tachinidae

Genus

Eugenia