Research Article |
Corresponding author: Gangmin Zhang ( gary1967@bjfu.edu.cn ) Academic editor: Thais Almeida
© 2019 Caihong Wang, Wenli Yang, Junwen Zhao, Danke Zhang, Gangmin Zhang.
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:
Wang C, Yang W, Zhao J, Zhang D, Zhang G (2019) Two new records of the fern genus Coniogramme (Pteridaceae) from Vietnam. PhytoKeys 119: 137-142. https://doi.org/10.3897/phytokeys.119.33126
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Two new records of the fern genus Coniogramme Fée from Vietnam, C. japonica and C. procera, are presented. In addition, a key to recognising the species of Coniogramme in Vietnam is given in this paper.
Cryptogrammoideae, taxonomy, Vietnam
Coniogramme Fée, which belongs to the subfamily Cryptogrammoideae in the family Pteridaceae (
The genus was first monographed in its modern form by
Although many new taxa have been recorded recently, the fern diversity in Vietnam remains unclear (
Japan. No exact location. C. P. Thunberg s.n. (UPS!).
Vietnam. Cao Bang Province: Ha Lang District, Dong Loan municipality, vicinities of Ban Lung and Lung Phuc, 22°46'N, 106°44'E, 500–600 m elev., 25 Nov 1998, L. Averyanov et al. CBL 656 (HN). Bac Kan Province: Cho Don District, Ban Thi municipality, Phia Khao village, 22°17'03"N, 105°30'34"E, ca. 800 m elev., 5 Mar 2011, N.Q. Hieu, N.T. Hiep, P.K. Loc, P.V. The, & N.T. Vinh CPC 1240 (HNU 017603, HNU 017604).
This species is very unique in morphology, differing from other species in its anastomosing veins, which form 1–3 rows of areoles along each side of midrib and hydathodes not extending the base of short serrated teeth.
Coniogramme japonica is distributed in China, Japan (including Ryukyu Islands), Korea and Vietnam (new record). The species usually grows in shady wet places at an elevation of about 100 to 2000 m.
Nepal. April 1821. Wallich no 3 (K!).
Vietnam. Kon Tum Province: NW slopes of Ngoc Link mountain, 2380 m elev., 06 Mar 1995, L. Averyanov et al. VH 519 (HN); W slope of Ngoc Link mountain, 1950 m elev., 10 May 1995, L. Averyanov et al. VH 1290 (HN).
This species is large and up to 1.8 m tall, differing from other species in its far more dissect laminae, basal pinnae having more than 10 pairs of pinnules, pinnules with rounded-truncate or truncate (sometimes slightly cordate) base and coarsely serrated margin and sori extending only to 1/2–2/3 of veins.
Coniogramme procera was once recorded being distributed in Vietnam in Flora Reipublicae Popularis Sinicae (
Based on previous literature (
1 | Veins anastomosing to form 1 or 2 continuous rows of areoles on each side of midrib | C. japonica |
– | Veins all free | 2 |
2 | Pinnule margins entire | 3 |
– | Pinnule margins serrate | 5 |
3 | Hydathodes extending to cartilaginous lamina margin | C. macrophylla |
– | Hydathodes spindle-shaped, not extending to lamina margin | 4 |
4 | Base of pinnules rounded or slightly cordate | C. petelotii |
– | Base of pinnules cuneate or rounded-cuneate | C. fraxinea |
5 | Basal pinnae having more than 10 pairs of pinnules; pinnules broadly lanceolate, base rounded-truncate or truncate (sometimes slightly cordate) | C. procera |
– | Basal pinnae having 2–3 pairs of pinnules; pinnules lanceolate, base rounded to rounded-cuneate | C. intermedia |
We are grateful to Professor Phan Ke Loc and the curator of the HN herbarium for providing access to the material in their care. The study was supported by the National Natural Science Foundation of China (Grant no. 31770221). We thank LetPub (http://www.letpub.com) for its linguistic assistance during the preparation of this manuscript.