Research Article |
Corresponding author: Akiko Soejima ( soejima@sci.kumamoto-u.ac.jp ) Academic editor: Alan Paton
© 2016 Akiko Soejima, Shuichiro Tagane, Ngoc Nguyen Van, Chinh Nguyen Duy, Nguyen Thi Thanh Huong, Tetsukazu Yahara.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Soejima A, Tagane S, Van NN, Duy CN, Huong NTT, Yahara T (2016) Callicarpa bachmaensis Soejima & Tagane (Lamiaceae), a new species from Bach Ma National Park in Thua Thien Hue Province, Central Vietnam. PhytoKeys 62: 33-39. https://doi.org/10.3897/phytokeys.62.7974
|
A new species, Callicarpa bachmaensis Soejima & Tagane, sp. nov., is described and illustrated from Bach Ma National Park in Thua Thien Hue Province, Central Vietnam. This species has a characteristic liana habit, white corolla, and narrowly elliptic to narrowly lanceolate, entire, occasionally subequal leaves, by which it is clearly distinguished from the other previously known species of this genus.
Bach Ma National Park, Callicarpa , Lamiaceae , new species, Thua Thien Hue, Vietnam
The genus Callicarpa L. (Lamiaceae) comprises 154 species and 12 varieties (
The species of Vietnam have been studied by
VIETNAM. Thua Thien Hue Province, Bach Ma National Park, edge of evergreen forest along stream, 16°13'36.70"N, 107°51'07.22"E, alt. 414 m, 24 May 2015, with flowers, Tagane S., Toyama H., Yahara T., Ngoc Nguyen, Chinh Nguyen, Okabe N. V2677 (holotype
Callicarpa bachmaensis is distinguishable from the other species of Callicarpa by a combination of its liana habit, white flowers and narrowly elliptic to narrowly lanceolate, entire, occasionally subequal leaves. Callicarpa angusta Schauer, endemic to Philippines, and C. angustifolia King & Gamble, distributed in China, Cambodia, Thailand, Vietnam, and Peninsular Malaysia, resemble to C. bachmaensis in possessing narrowly elliptic leaves. However, they differ from C. bachmaensis in having a shrubby habit and serrate leaves. Additionally, C. angusta differs in having hairy corollas, and C. angustifolia differs in having larger leaves (more than 9 cm long in C. angustifolia vs. less than 9 cm long in C. bachmaensis) and larger corollas (ca. 3 mm long vs. 2–2.2 mm long).
Liana-like small tree, ca. 3 m tall. Branches sweeping with gradual curve and overhanging distally. Twigs with a dense indumentum of short plumose or dendroid brown hairs, slightly 4-angular when young, later becoming terete, woody and glabrous, lenticellate; internode 8.7–13 cm long in main stems, 1.4–3 cm long in axial ones. Leaves opposite, occasionally subequal; blades narrowly elliptic to narrowly lanceolate, (2.6–)5–8 × (0.4–)0.8–2 cm in larger leaves, 1.1–4 × 0.2–1 cm in smaller ones, base acute to cuneate, apex acuminate, margin entire, upper surface with short stellate hairs or sometimes almost glabrous, also with small yellow sessile glands and a few larger sessile glands, lower surface densely covered with white stellate or sometimes pale brownish fringed peltate scale-like hairs and a few larger sessile glands, chartaceous to subcoriaceus, green and slightly lustrous above, white hairy below; midrib slightly sunken above, prominent below, secondary veins 6–10 pairs, prominent below, tertiary veins scalariforming-reticulate; petioles 0.8–1.1 cm long, with indumentum as branches. Inflorescence axillary, cymose, entirely covered with indumentum as branches, peduncles 0.8–1 cm long; bracts linear, 1.5–2 mm long; pedicels ca. 0.5 mm long. Calyx cup-shaped, 1–1.5 mm long with 4 (or 5) shallow lobes, outer surface covered with stellate or short dendroid hairs and small yellow sessile glands, inner surface almost glabrous. Corolla white, 2–2.2 mm long, divided into four lobes, tube ca. 1 mm long, lobes oblong-ovate, <1 mm long, apex rounded, outer surface with yellow sessile glands, inner surface almost glabrous. Stamens 4, ca. 1 mm long exerted from corolla, filaments 2.5–3 mm long, glabrous, anthers elliptic, ca. 1 mm long, with many yellow sessile glands near connectives, dehiscing through longitudinal slits. Stigma capitate, style ca. 6 mm long, glabrous. Fruits drupaceous, spherical, 2.5–3 mm in diameter, dark purple, sparsely covered with stellate hairs.
Vietnam. 20 June 1976, with fruits, Ly Quoc Anh 106 (
Flowering specimens were collected in May and June; fruiting in June, July, and October.
VIETNAM: Northeast (Lao Cai and Vinh Phuc Province) and Central coast (Thua Thien Hue, Quang Nam and Da Nang Province) (Fig.
Tagane et al. V2677: LC120829 (rbcL), LC120830 (matK).
The specific epithet bachmaensis reflects the name of the locality where the type specimen was collected.
Data Deficient (DD). Callicarpa bachmaensis is collected from north and central Vietnam. In the type locality, Bach Ma National Park, the number of individuals is likely stable, but at present we have no reliable information on its abundance and range. Further investigations are needed to accurately assess its status in the natural habitat.
The authors thank the staff of Bach Ma National Park for their kind assistance in the field survey, Keiko Mase for her help in DNA barcoding, and the curators of the herbaria