Abrahamia humbertii Randrian. &amp; Lowry
Creators: name: Randrianasolo, Armand
name: Lowry II, Porter P.
name: Schatz, George E.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Sapindales
Anacardiaceae
Abrahamia
Abrahamia humbertii

description: 12. <i>Abrahamia humbertii</i> (H. Perrier) Randrian. &amp; Lowry, comb. nova (Fig. 11 A-B). ≡ <i>Protorhus humbertii</i> H. Perrier in Mém. Mus. Natl. Hist. Nat. 18: 259. 1944. Lectotypus (designated here): MADAGASCAR. Prov. Antsiranana: Rég. Diana, collines et plateaux calcaires de l’Ankarana, forêt tropophile, [12°54’S 49°08’E], XII.1937 - I.1938, fl., <i>Humbert 18793</i> (P [P00722645]!; isolecto-: P [P00722646]!). Syntypi: MADAGAS-CAR. Prov. Antsiranana: Ankarana, [12°54’S 49°08’E], 300-350 m, XII.1937 - I.1938, fr., <i>Humbert 18963</i> (P [P00722648]!); <i>ibid. loco</i>, <i>Humbert 18967</i> (P [P00722647]!). <b>Description</b> <i>Trees</i> 3-20 m tall, 5-13 cm DBH, bark with translucid latex; young twigs glabrous to pubescent towards the tips, with lenticels, waxy. <i>Leaves</i> opposite, deciduous; blades widely elliptic to elliptic or circular to obovate, 3-9 <b>3</b> 1.7-6 cm, subcoriaceous, apex emarginate, retuse, margin entire, base obtuse and oblique, adaxial surface glabrous or waxy, abaxial surface glabrous or sometimes with very scarce short indument, venation craspedodromous, midvein prominent abaxially, secondary veins 10-18 pairs, 2-6 mm apart, prominent abaxially, tertiary veins visible on both surfaces; petiole 7-15 mm long, canaliculate on adaxial surface, pubescent and waxy. <i>Inflorescence</i> axillary and terminal, a thyrse, 1.5-3 cm long, branches flattened, pubescent. <i>Male</i> and <i>female flowers</i> 5-merous; pedicel c. 0.2- 0.3 mm long, glabrous; calyx lobes widely depressed ovate, 0.5-0.7 <b>3</b> 1 mm, imbricate, glabrous on both surfaces, persistent on fruit; corolla lobes ovate, 2.5 <b>3</b> 1.5 mm, imbricate, adaxial surface glabrous, abaxial surface pubescent; stamens 5 or 6. <i>Male flowers</i> with filaments 1-1.5 mm long, glabrous, anthers 0.5-1 mm long, obloid to slightly ovoid, yellow, glabrous; disk cupuliform and crenulate, c. 1 mm in diam., glabrous; ovary rudimentary. <i>Female flowers</i> with filaments 1.5 mm long, glabrous, anthers 0.7-1 mm long, ovoid, sterile, yellow, glabrous; disk c. 1-1.5 mm in diam., glabrous; ovary widely to very widely ovoid, 1.5-2.5 <b>3</b> 1-2 mm, glabrous, placentation parietal or subapical; style trifid, apically inserted, c. 0.5 mm long, glabrous, stigmas capitate. <i>Fruits</i> 2.5-3 <b>3</b> 1.5-2 cm, ellipsoid, symmetrical or very slightly asymmetrical, glabrous, with longitudinal striations. <b>Vernacular names</b> “Taimbarika’’, “Mampisaraka’’. <b>Distribution, ecology and phenology</b> <i>Abrahamia humbertii</i> occurs in deciduous and dry forests in northwestern and western Madagascar (Map 2), particularly in several areas with karstic limestone (locally known as ‘tsingy’), viz. Ankarana, Bemaraha, and Kasinga (Tamponketsa). Flowers have been collected in November and December, and fruits are known from November through March. <b>Conservation status</b> With an EOO of 22,183 km 2, a minimum AOO of 32 km 2, and 7 known locations, only 1 of which occurs within a protected area (Ankarana) whereas the others are very likely subjected to ongoing pressure from fire and forest degradation and clearing that is pro-jected to lead to a reduction in quality of habitat, <i>A. humbertii</i> is assigned a preliminary conservation status of “Vulnerable” [VU B 2(iii)] using the IUCN Red List Categories and Criteria (IUCN, 2012). 72 Boissiera 71 <b>Notes</b> The most distinctive character of <i>A. humbertii</i> that sets it apart from the other members of the genus is its widely elliptic to circular leaf shape. Among the syntypes of <i>Protorhus humbertii</i>, we have selected <i>Humbert 18793</i> as the lectotype because it, along with the isolectotype, comprise more complete specimens (albeit in flower) than the other collections cited in the protologue <i>(Humbert 18963</i> and <i>18967)</i>, both of which are in fruit. <b>Additional material examined</b> Madagascar. Prov. Antsiranana: Ankarana, env. du Campement des Anglais, 12°55’57’’S 49°04’20’’E, 180-225 m, 19.XI.1996, fr., <i>Andrianantoanina et al. 1018</i> (G, MO, P, TAN); Ankarana, zone du lac Vert, 2.XI.1990, fl., <i>Bardot-Vaucoulon 197</i> (P); Ankarana, camp des Anglais, 10.XI.1990, fl., <i>Bardot-Vaucoulon 270</i> (P); <i>ibid. loco</i>, 25.XI.1990, fr., <i>Bardot-Vaucoulon 338</i> (P); <i>ibid. loco</i>, 12°54’42’’S 49°6’42’’E, 180 m, 15.X.1997, fr., <i>Bardot-Vaucoulon 762</i> (P); <i>ibid. loco, Bardot-Vaucoulon 763</i> (MO, P, TAN); Ankarana, XII.1991, fl., <i>Foury s.n.</i> (P); Sakaramy, Montagne des Français, [12°26’S 49°16’E], 8.XI.1944, y. fr., <i>Homolle 307</i> (P); Ankarana, near campement des Anglais, 12°54’S 49°08’E, 150 m, 29. I.1994, fr., <i>Leeuwenberg 14345</i> (MO, P, TAN, WAG); Andranovondronina, Anjiabe, forêt de Belamoty, 12°06’09’’S 49°19’34’’E, 85 m, fr., <i>Ratovoson 1154</i> (CNARP, MO, P, TAN); Ankara (= Ankarana), Jardin Botanique n° 8, [12°49’S 49°01’E], 28.XI.1952, fr., <i>Service Forestier 6185</i> (P [2 sheets], TEF); S de Marotaolana (Anivorano-Nord), [12°49’30’’S 49°15’30’’E], 8.III.1964, fr., <i>Service Forestier 23366</i> (P). Prov. Mahajanga: Antsalova, forêt de Tsiampihy et forêts cotières près de Besaraha, de Bemiha et de Soahanina, 0-20 m, 23.XII.1952, fl., <i>Leandri 2240</i> (MO, P); Antsalova, env. de Besara, [18°40’S 44°15’E], 23.XII.1952, fl., <i>Service Forestier 6863</i> (G, MO, P).
description: Published as part of <i>Randrianasolo, Armand, Lowry II, Porter P. &amp; Schatz, George E., 2017, Taxonomic treatment of Abrahamia Randrian. &amp; Lowry, a new genus of Anacardiaceae from Madagascar, pp. 1-152 in Boissiera 71</i> on pages 71-72, DOI: 10.5281/zenodo.7618113
description: {"references": ["IUCN (2012). IUCN Red List Categories and Criteria: Version 3.1 ed. 2. IUCN Species Survival Commission, Gland &amp; Cambridge."]}