Colea unifoliolata Callmander &amp; Phillipson 2012, sp. nov.
Creators: name: Callmander, Martin W.
name: Phillipson, Peter B.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Bignoniaceae
Colea
Colea unifoliolata

description: <i>Colea unifoliolata</i> Callm. &amp; Phillipson, sp. nov. (Figs 3; 4A) <i>Haec species a congeneris foliis unifoliolatis, lamina foliari crasse coriacea discolori adaxialiter atroviridi (in sicco atrogrisea) abaxialiter clare purpurea (in sicco atropurpurea) atque corolla saturate magentea fauce alba luteo-maculata distinguitur.</i> TYPUS. — <b>Madagascar</b>. Prov. Toamasina, Summit of quartzite massif of Ankirindro, <i>c</i>. 25 air-km NW of Maroantsetra via the Antainambalana and then Vohimaro rivers, 15°18’08”S, 49°33’04”E, 671 m, fl., 1.II.1999, <i>Schatz et al. 3915</i> (holo-, MO!; iso-, P [P00568744]!, TAN!). PARATYPUS. — <b>Madagascar</b>. Prov. Toamasina, reg. Analanjirofo, Ankirindro, Ankiriandro Mountain, 15°17’37”S, 49°33’10”E, 640 m, imm. fr., 10.I.2003, <i>Antilahimena, Pascal &amp; Ramaroson 1680</i> (MO, P, TAN). DESCRIPTION Treelet 2-3 m tall, usually unbranched. Leaves unifoliolate, (13-)19-21 (including petiole) × 6-7 cm; petiole 2.5-3.5 cm long, <i>c.</i> 2 mm diameter, glabrous, canaliculate,thickened and slightly angled at the apex, verticillate on the branches, 2-4 leaves per verticil; leaf blade elliptic, (10-)16-18 × 6-7 cm, thick succulent, coriaceous, discolorous, dark green above (dark grey when dry), bright purple below, base shortly attenuate; margins entire; apex rounded, rarely acuminate; midrib and secondary veins visible on both surfaces, prominent below, glabrous. Inflorescence a highly contracted raceme, up to 3 cm, cauliflorous on nodules, axes glabrous, bracts setaceous, with a very short glandular indument <i>c.</i> 1.5 × 0.1 mm, with scattered short glandular trichomes. Calyx with 5 veins, 5- toothed, light green (black when dry), <i>c.</i> 5 × 3 mm, glabrous. Corolla funnel-shape, deep magenta, the throat white with yellow splotches, and obscurely 2-lipped, with 5 sub-equal spreading lobes, c.1-1.5 × 0.4-0.5 cm, finely puberulent with a whitish glandular indument outside; tube gradually narrowed to <i>c.</i> 2 mm diameter within the calyx; lobes rounded <i>c.</i> 4-6 × 4 mm. Stamens 4, <i>c.</i> 14 mm in length; anthers <i>c.</i> 2 mm, 2-locular. Style 15-18 mm long.Fruit an indehiscent follicle, pendant, immature fruit <i>c.</i> 3 × 1.5 cm, dark green (black when dried), ripped, <i>c.</i> 0.7-0.8 mm in diameter. DISTRIBUTION AND ECOLOGY <i>Colea unifoliolata</i> sp. nov. is only known from lowland evergreen tropical forest in the Makira region on the summit of Ankirindro Mountain, northwest of Maroantsetra (Fig. 1). REMARKS <i>Colea unifoliolata</i> sp. nov. is unique within the genus in having unifoliolate leaves. It is characterized by its leaf blade that is thick, coriaceous, discolorous, dark green above (dark grey when dry), bright purple below; its highly contracted inflorescence, the flowers with deep magenta corolla lobes and a white throat with yellow blotches. The new species is the ninth species of the genus <i>Colea</i> known to occur in the Antongil Bay region along with: <i>C. asperrima</i> H. Perrier, <i>C. hirsuta</i> Aug. DC., <i>C. membranacea</i> Aug. DC., <i>C. nana</i> H. Perrier, <i>C. ramiflora</i> Zjhra, <i>C. rosea</i> Zjhra, <i>C. sytsmae</i> Zjhra and <i>C. tetragona</i> DC. However, none of the other species bear unifoliolate discolorous leaves, nor do they possess similarly coloured flowers. CONSERVATION STATUS With only two collections, an AOO of 9 km 2 and one subpopulation, none of which situated within the protected area network, <i>C. unifoliolata</i> sp. nov. is assigned a preliminary status of Critically Endangered [CR B2ab(iii)] (IUCN 2001).
description: Published as part of <i>Callmander, Martin W. &amp; Phillipson, Peter B., 2012, Two new species of Colea Bojer ex Meisn. (Bignoniaceae) endemic to Madagascar, pp. 115-122 in Adansonia (3) (3) 34 (1)</i> on pages 119-122, DOI: 10.5252/a2012n1a13, http://zenodo.org/record/5370820
description: {"references": ["IUCN 2001. - IUCN Red List Categories and Criteria: version 3.1. IUCN Species Survival Commission. IUCN, Gland and Cambridge, 30 p."]}