Begonia vinkii Sands

국표에 없다.

Diagnostic Description

Allied to Begonia symbracteosa, but differs in having the androecium exceeding the corolla at anthesis, and brownish ovate-lanceolate bracts (not white broadly ovate).

The flowers are white with a red spot near the style base (Frodin NGF 28408) or the base of the androecium (Millar & van Royen NGF 15978).

• Provided by: [B].The Begonia TEN / Begonia Resource Centre (Royal Botanic Garden Edinburgh)

Morphology

Sympodially branching herb to 60 cm high. Stem: c.3 mm wide, villose, internodes 1.2–3(–7) cm long. Stipules: persistent, lanceolate, 8 × 4 mm, glabrous, cuspidate. Leaves: petiole c.1–2 mm long, villose; lamina green, slightly asymmetric, lanceolate, 3.5–7.5(–10) × 1–2.5(–4) cm, glabrous above, villose on the veins below; base slightly oblique, overlapping the petiole; margin dentate, more so towards the apex; venation pinnate; tip acute. Inflorescence c.3 cm long, uni- or bisexual, female flowers solitary, subtending 10–15 male flowers; bracts brownish ovate-lanceolate 5 × 2 mm, becoming smaller towards the terminal flowers, glabrous, tip shortly cuspidate. Male flower: pedicel 0.3–1.4 cm long, puberulous; tepals 2, fused one-third of the length, ovate, 5–7 × 5 mm, puberulous, tip acute; androecium on an elongate thin column, exceeding the corolla at anthesis, stamens 15–20, filaments c.1 mm, anthers ellipsoid. Female flower: pedicel 4–8 mm long, sparsely puberulous; ovary c.13 × 13 mm including wings, capsule ellipsoid, 9 × 4 mm, wings c.6 mm wide at apex, sparsely puberulous, apex arcuate; corolla c.10 mm long, sparsely villose, with 5 lobes each 3 mm long; styles 3, elongate, bifid, stigmatic surface twice spirally twisted. Fruit: shape as for the ovary, enlarging to c.15 × 18 mm.

• Provided by: [B].The Begonia TEN / Begonia Resource Centre (Royal Botanic Garden Edinburgh)

Habitat

in montane forests, as a terrestrial or stream-side herb, 1700–2790 m altitude.

• Provided by: [B].The Begonia TEN / Begonia Resource Centre (Royal Botanic Garden Edinburgh)

Distribution

Widespread in the highlands of Papua New Guinea.

• Provided by: [B].The Begonia TEN / Begonia Resource Centre (Royal Botanic Garden Edinburgh)

Threats

Least Concern. Widespread in the highlands of Papua New Guinea, covering a considerable altitudinal range.

• Provided by: [B].The Begonia TEN / Begonia Resource Centre (Royal Botanic Garden Edinburgh)

Begonia vinkii Sands (worldfloraonline.org)

 

https://youtu.be/R6rXxY4Nir8?t=4628