Abrahamia longipetiolata Randrian. &amp; Lowry 2017, spec. nova
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 longipetiolata

description: 20. <i>Abrahamia longipetiolata</i> Randrian. &amp; Lowry, spec. nova (Fig. 17-18). Typus: MADAGASCAR. Prov. Antsiranana: Rég. Diana, commune Mahavonona, Montagne des Français, campement Ampitiantsambo, 12°23’13’’S 49°22’53’’E, 239 m, 11.IX.2004, bud &amp; fl., <i>Randriambololomamonjy 7</i> (holo-: MO- 6278643!; iso-: P [P04800624]!, TAN [TAN001993]!). <b>Diagnosis</b> <i>Abrahamia longipetiolata Randrian. &amp; Lowry can be distinguished from other members of the genus by the combination of its strikingly long petiole (15-30 mm) and small leaves (6-11</i> <b>3</b> <i>1.5-3 cm) with impressed secondary veins on the adaxial surface</i>. <b>Description</b> <i>Trees</i> c. 7-25 m tall, 19-60 cm DBH, bark with white latex. <i>Leaves</i> alternate, sometimes sub-opposite; blade narrowly elliptic to narrowly oblong, 6-11 <b>3</b> 1.5-3 cm, chartaceous to subcoriaceous, discolorous (glaucous above), apex acute and retuse, margin slightly revolute, base broadly cuneate, sometimes slightly asymmetric, adaxial surface glabrous, abaxial surface with appressed sericeous indument along the midvein, especially towards the base, venation craspedodromous, midvein prominent below, secondary veins 25-35 pairs, more or less parallel, 2-4 mm apart, impressed above, barely raised below, forming a wide angle with the midvein, tertiary veins very few, barely visible; petiole 15-30 mm long, 1-2 mm in diam., canaliculate on adaxial surface, strigose. <i>Inflorescence</i> terminal, a panicle, branched, 9 cm long, axes pubescent; bracts triangular, 1-2.5 <b>3</b> 0.5-1 mm, adaxial surface glabrous, abaxial surface pubescent. <i>Male</i> and <i>female flowers</i> 5-merous, small, 3-4 mm long; pedicel c. 1 mm long, pubescent; calyx lobes 1-1.1 mm, ovate, valvate, adaxial surface glabrous, abaxial surface pubescent; corolla lobes ovate, 3-4 <b>3</b> 1.5-2 mm, imbricate, adaxial surface glabrous, abaxial surface sparsely pubescent (much less so than calyx); stamens 5 (rarely 6). <i>Male flowers</i> with filaments c. 1-1.2 mm long, glabrous, anthers 1.1-1.2 <b>3</b> 1 mm, ovoid, yellow, glabrous; disk c. 1.5-2 mm in diam., cupuliform, glabrous; ovary rudimentary. <i>Female flowers</i> with 5 staminodes, sometimes 6, filaments c. 1 mm long, glabrous, anthers 1 <b>3</b> 0.5 mm, ovoid, sterile, yellow, glabrous; disk c. 2-2.5 mm in diam., glabrous; ovary widely ovoid, 1-1.1 <b>3</b> 1.1. 5 mm, glabrous; style short, c. 0.5 mm, stigmas capitate. <i>Fruits</i> 2.4-2.6 <b>3</b> 1.5-1.8 cm, asymmetrical, ellipsoid, glabrous, with weak longitudinal striations. <b>Distribution, ecology and phenology</b> <i>Abrahamia longipetiolata</i> occurs in forests in far northeastern Madagascar (Map 7). Flowering material has been collected in August and September, and fruits have been recorded from October to December. <b>Conservation status</b> With an EOO of 799 km 2, a minimum AOO of 20 km 2, and 6 localities, with subpopulations in only 2 protected areas (Loky Manambato and Montagne des Français), representing 5 locations, 3 of which are subjected to pressure from forest exploitation and land clearing, <i>A. longipetiolata</i> is assigned a provisional conservation status of “Endangered’’ [EN B1ab(iii)+2ab(iii)] using the IUCN Red List Categories and Criteria (IUCN, 2012). 96 Boissiera 71 [ A: <i>Randriambololomamonjy 7</i>, P; B-C: <i>Randriambololomamonjy 2</i>, P] Drawings:R.L. Andriamiarisoa <b>Notes</b> <i>Abrahamia longipetiolata</i> resembles <i>A. ibityensis</i> by the impressed venation of its leaves, but differs by its larger leaves (6-11 <b>3</b> 1.5-3 vs 3-7 <b>3</b> 1.2-3 cm), longer petiole (15-30 vs 5-7 mm), terminal paniculate (vs terminal or axillary thyrsiform) inflorescences, and fruit with united (vs separate) cotyledons. <b>Paratypi</b> MADAGASCAR. Prov. Antsiranana: Vohémar, forêt d’Ambilondava, N du village de Daraina, 13°10’S 49°39’E, 400 m, 25.X.2004, fr., <i>Callmander &amp; Anselme Be 268</i> (G, MO, P, TAN); Sadjoavato, forêt de Sahafary, 12°35’17’’S 49°26’45’’E, 207 m, 15.X.2007, fl., <i>Rakotoarivelo 172</i> (CNARP, G, MO, P, TAN); Mahavonona, Montagne des Français, campement Ampitiantsambo, 12°23’13’’S 49°22’53’’E, 239 m, 11.IX.2004, y. fr., <i>Randriambololomamonjy 2</i> (G, MO, P [2 sheets], TAN); Andrafiabe, Sahafary, 12°35’43’’E 49°26’54’’E, 233 m, 11.IX.2004, fl. &amp; y. fr., <i>Razafitsalama et al. 638</i> (CNARP, G, MO, P, TAN, TEF); <i>ibid. loco</i>, [12°34’S 49°26’E], 10.XII.1952, fr., <i>Service Forestier 6287</i> (MO, P, TEF); <i>ibid. loco,</i> 9.IV.1953, ster., <i>Service Forestier 216-R-6</i> (P); N de Vohémar, versant du Massif de l’Ankerana, [13°17’S 49°51’E], 50-450 m, 17.XII.1966, fr., <i>Service Forestier 27359</i> (G, MO, P [2 sheets], TEF).
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 95-96, 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."]}