Published January 15, 2019 | Version v1
Taxonomic treatment Open

Didymoplexis siamensis var. amamiana Suetsugu 2019, var. nov.

  • 1. Department of Biology, Graduate School of Science, Kobe University, 1 - 1 Rokkodai, Nada-ku, Kobe, 657 - 8501, Japan;
  • 2. Botanical Garden Division, Taiwan Forestry Research Institute, No. 53, Nanhai Rd., Taipei 100, Taiwan

Description

Didymoplexis siamensis var. amamiana Suetsugu, var. nov. (Figs. 1A, 2)

Type:— JAPAN. Ryukyu Islands: Kagoshima Pref., Amami-Oshima Island, Amami City, Naze, 5 May 2018, Morita N 15-04 (holotype: TNS, a flower in the spirit collection).

Didymoplexis siamensis var. amamiana differs from D. siamensis var. siamensis only in lacking a pair of the long recurved stelidia on each side of its stigma.

Additional specimens examined:— JAPAN. Ryukyu Islands: Kagoshima Pref., Amami-Oshima Island, Amami City, Naze, 5 May 2018, Morita N15-07 (TNS, a flower in the spirit collection); Kagoshima Pref., Amami-Oshima Island, Amami City, 13 May 2018, Morita N15 - A (KYO, a flower in the spirit collection).

Note:— The new variety is currently known only from a single population. About 20 flowering individuals were found in a dense forest dominated by Castanopsis sieboldii (Makino) Hatusima (1971: 223). The new variety is not completely sympatric with D. siamensis var. siamensis, whereas D. siamensis var. siamensis can be observed a few hundred meters from the type locality.

Notes

Published as part of Suetsugu, Kenji & Hsu, Tian-Chuan, 2019, New combinations in the genus Didymoplexis (Orchidaceae; Epidendroideae; Gastrodieae), with a new variety of D. siamensis from Amami-Oshima Island, Japan, pp. 174-178 in Phytotaxa 388 (2) on page 177, DOI: 10.11646/phytotaxa.388.2.4, http://zenodo.org/record/13725214

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Additional details

Biodiversity

Collection code
A, KYO , TNS
Material sample ID
N15 , N15-07
Event date
2018-05-05 , 2018-05-13
Verbatim event date
2018-05-05 , 2018-05-13
Scientific name authorship
Suetsugu
Kingdom
Plantae
Phylum
Tracheophyta
Order
Asparagales
Family
Orchidaceae
Genus
Didymoplexis
Species
amamiana
Taxon rank
variety
Taxonomic status
var. nov.
Taxonomic concept label
Didymoplexis siamensis var. amamiana Suetsugu, 2019