Corresponding author: Van Son Dang (
Academic editor: Y. Mutafchiev
Dang VS, Truong BV, Nguyen TPT, Hoang NS (2018)
The family
During botanical field surveys in Hon Ba Nature Reserve, Khanh Hoa Province, southern Vietnam in 2017, a species of
The description of the new species was based on material collected in Hon Ba Nature Reserve (over 19,000 ha), Khanh Hoa Province, southern Vietnam (Figure
Type locality of
VIETNAM. Khanh Hoa Province, Hon Ba Nature Reserve, terrestrial under the shade of the canopy on dry soil or close to the stream, alt. 353 m,
Perennial herbs.
VIETNAM. Khanh Hoa Province, Hon Ba Nature Reserve, growing under forest canopy, uncommonly along the riparian forest, alt. 400 m,
Flowers were observed in April and May. Immature and mature fruits were observed in May and June.
The name of this species is derived from the name of the province Khanh Hoa, where the species was discovered.
Morphological comparison of
Characters |
|
|
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---|---|---|---|
Leaves | |||
– number | 5 to 8 | 3 to 12 | 5 to 10 |
– shape of leaf lamina | oblong to obovate or oblong-elliptic | oblong to oblong-elliptic | oblong-obovate |
– length of leaf lamina | 30–45 cm | 20–50(–60) cm | 55 cm |
– length of petiole | 14–22 × 0.5–1 cm | 11–43 × 0.2–0.5 cm | 30–50 × 0.7–1.2 cm |
Inflorescence | |||
– number of flowers | 5 to 10 | 15 to 25 | 25 |
– length of scape | 20–38 cm | 6–63 cm | 40–70 cm |
– outer involucral bracts | ovate-lanceolate, | ovate-lanceolate, | lanceolate to oblong-ovate, |
4.5–5.5 × 2–2.5 cm | 2–9 × 0.8–4 cm | 6–8 × 3–4 cm | |
– inner involucral bracts | broadly ovate, | broadly ovate, | broad-triangular, |
6–6.5 × 4–5 cm | 2.5–10 × 1.5–9 cm | 10–16 × 8–10 cm | |
Flowers | |||
– colour of buds | dark red | green | black-purple |
– outer perianth lobes | narrowly ovate or triangular, | oblong-ovate or narrowly triangular, | oblong, |
10 × 3–5 mm | 5–12 × 3–8 mm | 12 × 8 mm | |
– inner perianth lobes | broadly ovate, | broadly ovate or triangular, | broad-ovate, |
8–10 × 4–6 mm | 4–11 × 4–12 mm | 12 × 10 mm | |
Apex of stigma lobes | 2-lobed | 3-lobed | 2-lobed |
Ovaries | 5–6 × 8–9 mm | 2–7 × 3–5 mm | 5–8 × 10 mm |
Fruits | 3–4 × 1.5–2 cm | 2–4 × 1–2 cm | 4–6 × 2–2.5 cm |
Seeds | 1.5–5 × 1–1.5 mm, slightly brown, 4–7-ribbed | 2–4 × 1–2 mm, brown, 9–14-ribbed | 2–3 × 1.5–2 mm, brownish-red, many ribbed |
1 | Leaves lobed |
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– | Leaves entire |
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2 | Leaves 3-lobed, each lobe pinnately. Filiform bracts present |
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– | Leaves 3–13-lobed, each lobe simple. Filiform bracts absent |
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3 | Leaf-base attenuate and decurrent. Fruit dehiscent |
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– | Leaf-base attenuate but not decurrent. Fruit indehiscent |
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4 | Inner two involucral bracts long petiolate |
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– | Inner two involucral bracts sessile |
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5 | Inner involucral bracts suborbicular-fan-shaped |
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– | Inner involucral bracts broadly ovate |
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6 | Inflorescence with 15–25-flowered. Apex of stigma lobes 3-lobed. Seeds reniform, brown, 9–14-ribbed |
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– | Inflorescence with 5–10-flowered. Apex of stigma lobes emarginated or 2-lobed. Seeds reniform, slightly brown, 4–7-ribbed |
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Authors are grateful to the staff of the Hon Ba Nature Reserve for their kind assistance during the field survey. We thank the curators and staff of the herbaria at the VNM, HN and VNMN for their help in accessing specimens. This work was partly supported by the National Collection Project (BSTMV.20/16-21) of the Vietnam Academy of Science and Technology, Vietnam.