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Begonia rachmatii, nom. val., in Edinburgh J. Bot. 61(2-3): 101. 2005
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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. 2005: Three new species and a new subspecies of Begonia (Begoniaceae) from Asia. – Edinburgh Journal of Botany 61(2-3): 97-107)
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. 2005: Three new species and a new subspecies of Begonia (Begoniaceae) from Asia. – Edinburgh Journal of Botany 61(2-3): 97-107)