Micronychia tsiramiramy H. Perrier
Creators: name: Randrianasolo, Armand
Publisher: name: Zenodo
Year: 2000
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Sapindales
Anacardiaceae
Micronychia
Micronychia tsiramiramy

description: Micronychia tsiramiramy H. Perrier
Mém. Mus. Hist. Nat. Paris 18: 267 (1944).
— Lectotype (here designated): Gouvernement Général de Madagascar 56, Madagascar, Toamasina Prov., forêt d’Analamazaotra, fl. (P!; iso-, P!).
Trees or shrubs, 2-20 m tall; young twigs glabrous, sometimes with lenticels and fine pubescence at the tip, bark with translucide latex. Leaves coriaceous or subcoriaceous, persistent; blades oblanceolate to obovate, narrowly elliptic or elliptic, 2-11.5 cm long, 1-5.3 cm wide, apex emarginate, retuse, rounded or shortly acuminate, base acute to cuneate decurrent, margin entire; adaxial and abaxial surfaces glabrous. Venation pinnate and craspedodromous, midvein prominent below, 9-11 secondary veins, 3-8 mm apart, arcuate or more or less parallel, prominent below, forming an obtuse angle with the midrib at the leaf base, tertiary veins ramified, admedial, some veins connected with others’ branches. Petiole 3-15 mm long, canaliculate or shallowly channeled, glabrous to glabrescent. Inflorescence axillary, subterminal or terminal, pendent, paniculate, with zigzag rachis, 1.5-9 cm long, branches flattened, sometimes regular, glabrous or glabrescent; bracts triangular or deltate, 0.5-2 mm long, 0.5-1 mm wide, abaxially setulose. Flowers 5- merous, unisexual; pedicel 0.2-1.5 mm long, glabrous or pubescent; calyx lobes very widely or widely depressed ovate, 1-2.5 mm long, 1-2.5 mm wide, abaxially glabrous, imbricate; corolla lobes ovate to oblong or obovate, 3-5 mm long, 1.5-3 mm wide, abaxially glabrous, pink, imbricate or quincuncial; stamens 5; in staminate flowers filaments 1.5-2 mm long, straight, flattened and broadened at the base, inserted basally on the outer surface of the disk, glabrous, white; anthers 1-2 mm long, oblong to slightly ovate and curved, yellow, glabrous, dorsifixed, introrse, dehiscent by longitudinal slits; disk shallowly cup-shaped or cupiliform, 1-1.5 mm in diam., glabrous, ovary rudimentary; in pistillate flowers filaments 1-1.5 mm long, straight, flattened and broadened at the base, glabrous, white, inserted basally on the outer surface of the disk; anthers 0.5-1 mm long, ovate, yellow, glabrous; disk annular and cup-shaped, ca. 1.5 mm in diam., glabrous; ovary widely depressed to depressed ovate or very widely ovate, laterally compressed and asymmetrically oblique, 1-2 mm long, 1 mm broad, glabrous, unilocular, with 1 anatropous ovule with a long funicle, placentation parietal; the single style trifid, lateral or latero-subapical, 1- 1.5 mm long, glabrous; stigmas 3 lobed and capitate. Fruits drupaceous, 0.8-1.4 cm long, 0.6-1.5 cm broad, asymmetric and mango-shaped, surface with longitudinal striations, glabrous, mesocarp resinous, endocarp thin.
Micronychia tsiramiramy is distinguished from the other species of Micronychia by having leaves that are glabrous on both surfaces with a decurrent base and a retuse, emarginate, rounded or shortly acuminate apex.
Two varieties were described by PERRIER DE LA BÂTHIE (1944), both of which are recognized here. They are easily distinguishable by leaf and floral characters, but the differences are not sufficient to justify recognizing them as separate species.
Key to the varieties of Micronychia tsiramiramy
1. Leaves 3-11.5 cm long, 1.8-5.3 cm wide; petiole 3-15 mm long; sepals 1.5-2.5 mm long, 1.8-2.5 mm wide ........................................................................................................................................... var. tsiramiramy
1.’ Leaves 2-6.5 cm long, 1-3 cm wide; petiole 3-6 mm long; sepals 1 mm long, 1 mm wide .... var. minutiflora
description: Published as part of Randrianasolo, Armand, 2000, A taxonomic revision of the Malagasy endemic genus Micronychia (Anacardiaceae), pp. 145-155 in Adansonia (3) (3) 22 (1) on pages 151-152, DOI: 10.5281/zenodo.4605738