Begonia rachmatii Tebbitt in Edinburgh J. Bot. 61(2-3): 101. 2005

Primary tabs

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Begonia Section

  • Petermannia

Diagnosis

  • B. polilloensis M.C.Tebbitt affinis sed foliis minoribus et fructibus subsessilibus differt. Similar to B. polilloensis M.C.Tebbitt but differing in the smaller leaves and almost sessile fruit. - Type: Indonesia, Celebes, G. Babalombang, viii 1913, Rachmat 475 (holo L). (Tebbitt, M.C., Three new species and a new subspecies of Begonia (Begoniaceae) from Asia in Edinburgh Journal of Botany 61(2-3). 2005)

Description

  • Erect, branched monoecious herb to at least 19cm tall [lower portion of specimen missing].

    Rhizome details not known. Stem glabrous, apical portion not flexuose.

    Stipules persistent, lanceolate-ovate, 3.5-7x2-3mm. Leaves alternate: petiole glabrous, 0.8-2cm, joining blade at an oblique angle; blade asymmetrically ovate in outline, 1.6-2.2x1.5-2.3cm, palmately compound, 5-6-lobed, margin of lobes toothed to very shortly lobed, with sparse glandular hairs ending the lobes and teeth, otherwise glabrous.

    Inflorescences unisexual; male inflorescence terminal, few-flowered, cymose; bracts deciduous, lanceolate, c.4x1mm; female flowers solitary in upper leaf axils; bracts not seen.

    Male flowers: tepals 2, broadly ovate, 2x2.25-3mm, stamens c.15, arrangement asymmetric, filaments 0.5-0.75mm, fused at base, anthers elliptic-obovate, c.0.5mm long, connectives not projecting.

    Female flowers not seen.

    Infructescence: pedicel c.1mm long, fruit becoming scarious, grey-brown, dehiscing along junction of wings, wings deltoid, c.5x8mm, apex abruptly truncate, base shallowly cuneate. (Tebbitt, M.C., Three new species and a new subspecies of Begonia (Begoniaceae) from Asia in Edinburgh Journal of Botany 61(2-3). 2005)

Conservation

  • Proposed IUCN category: DD. Insufficient specimens could be georeferenced with certainty. (Hughes, M. An annotated checklist of Southeast Asian Begonia. 2008)

Distribution

Asia-Tropical:, Sulawesi (Sulawesiendemic)
Endemic to Indonesia, Sulawesi, West Sulawesi.

See 'Specimens' tab for map of point distribution data of georeferenced specimens.