A taxonomic revision of the Boehmeria spicata complex (Urticaceae) in Korea

Abstract

Seven species and two varieties belonging to the genus Boehmeria Jacq. (Urticaceae) are known to be distributed in Korea. Among them, B. spicata, B. tricuspis, and B. tricuspis var. unicuspis were subjected to an external morphological study. Among the individuals believed to exhibit variations in the leaf shape, B. gracilis and B. silvestrii were newly recognized. Unlike related taxa, B. gracilis has middle leaves with an elliptic, broadly elliptic, ovate, or broadly depressed ovate shape, a regular and serrulate-dentate margin, and an unlobed and short caudate or cuspidate apex. Boehmeria silvestrii has middle leaves with 5-angled ovate, orbicular ovate or broadly ovate shapes, and 3-or 5-lobed and caudate apices. Therefore, we assigned the corresponding names 'Top-geo-buk-kko-ri' and 'Cham-geo-buk-kko-ri'. Meanwhile, the B. spicata complex (B. gracilis, B. silvestrii, B. spicata, and B. tricuspis var. unicuspis) is very closely related in terms of the morphological characters, whereas B. tricuspis exhibits no relationship. Furthermore, because the scientific name and type specimen of B. tricuspis var. unicuspis (Pul-geo-buk-kko-ri) are problematic, the correct name B. paraspicata Nakai and corresponding holotype are presented. Additionally, lectotypes of B. gracilis and B. silvestrii are newly designated here. A taxonomic treatment, descriptions, a key, photographs, type specimens, and leaf variation images of the B. spicata complex are provided in this study.

Comparative morphological analysis reveals a new record of <i>Boehmeria nakashimae</i> (Urticaceae) in Korea

“…Approximately 12-14 taxa of Boehmeria are known to be distributed in Korea (Kim and Sun, 2018;Korea National Arboretum, 2023). Recently, Jo et al (2021) taquetii Nakai have been considered as endemic species in Jejudo Island, Korea (Lee, 1996). However, Jo (2023) recently treated B. nakaiana and B. taquetii as newly additional synonyms of B. sieboldiana Blume, and B. hirtella and B. quelpaertensis were also confirmed to be distributed in Japan.…”

“…Recently, Jo et al (2021) taquetii Nakai have been considered as endemic species in Jejudo Island, Korea (Lee, 1996). However, Jo (2023) recently treated B. nakaiana and B. taquetii as newly additional synonyms of B. sieboldiana Blume, and B. hirtella and B. quelpaertensis were also confirmed to be distributed in Japan. Therefore, he did not consider these two species as Korean endemic species.…”