Metapetrocosmea alba X. R. Zheng, P. S Zou & S. P. Dai 2023, sp. nov.
In: Metapetrocosmea alba (Gesneriaceae), 2023, S. 199-204
unknown
Zugriff:
Metapetrocosmea alba X. R. Zheng, P. S Zou & S. P. Dai, sp. nov. (Figs. 1 & 2). Type:— VIETNAM. Thua Thien Hue Province: Hue City, Bach Ma National Park, the lowland montane, ca. 100 m a.s.l., specimens were collected from wild plants introduced and cultivated at the nursery of the Guangzhou Institute of Forestry and Landscape Architecture, 16 Sep. 2022, Xi-Rong Zheng ZXR216 (holotype: IBSC!; isotype: IBK!, VNMN!). Diagnosis:— The new species is most similar to M. poilanei in the distinct stem and similar calyx, but radically differs by its longer (12–14 mm vs. 10 mm) and white (vs. light violet) obliquely funnelform (vs. obliquely campanulate) corolla and three (vs. two) staminodes. And it is easy to distinguish the new species from M. cycnostyla by its distinct (vs. very short) stem, leaf blade shape (ovate or broadly ovate vs. elliptic) and size (4–8 × 3–5 cm vs. 2–3 × 1.5–2 cm). Description:— Herb, perennial, stem erect, 10–15 cm tall, sparsely villous. Leaves alternate; petiole 2–8 cm long, sparsely villous; blade carnose, adaxially sparsely glandular villous, abaxially glabrous, ovate or broadly ovate, 4– 8 × 3–5 cm, apex subacute, base lightly peltate, round or cordate, margin shallowly obtuse-dentate or shallowly undulateserrate, slightly curved, densely villous; venation penninerved, lateral veins 5–6 on each side of mid-rib. Inflorescence compound cymes, axillary, fasciculate; peduncle 10–18 cm long, densely glandular villous; bracts 2, ovate, 5–9 × ca. 5 mm, abaxially glandular villous, adaxially glabrous; bracteoles 2, ovate, ca. 5 × 3 mm, abaxially glandular villous, adaxially glabrous; pedicel 8–10 mm long, densely glandular villous. Calyx 5-parted to the base, with lobes lanceolate, ca. 5 × 1.5 mm, margin entire, outside densely glandular villous, inside sparsely glandular villous. Corolla obliquely funnelform, zygomorphic, white, 12–14 mm long, ca. 3 mm wide at the throat, outside densely pubescent, inside glabrous; tube ca. 12 mm long; limb distinctly 2-lipped; adaxial lip 2-lobed, lobes ...
Titel: |
Metapetrocosmea alba X. R. Zheng, P. S Zou & S. P. Dai 2023, sp. nov.
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Autor/in / Beteiligte Person: | Zheng, Xi-Rong ; Zou, Pei-Shan ; Chen, Ying ; Vu, Tien-Chinh ; Dai, Se-Ping |
Link: |
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Zeitschrift: | Metapetrocosmea alba (Gesneriaceae), 2023, S. 199-204 |
Veröffentlichung: | 2023 |
Medientyp: | unknown |
DOI: | 10.5281/zenodo.8158061 |
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