Research Article |
Corresponding author: Kae Sun Chang ( natu17@korea.kr ) Academic editor: Yasen Mutafchiev
© 2017 Dong Chan Son, Keum Seon Jeong, Kang-Hyup Lee, Heesoo Kim, Kae Sun Chang.
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:
Son DC, Jeong KS, Lee K-H, Kim H, Chang KS (2017) Semiaquilegia quelpaertensis (Ranunculaceae), a new species from the Republic of Korea. PhytoKeys 89: 107-113. https://doi.org/10.3897/phytokeys.89.21004
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Semiaquilegia quelpaertensis sp. nov., a new species belonging to the family Ranunculaceae, from Hallasan National Park in Jeju-do, Republic of Korea, is described and illustrated. The new species is similar to Semiaquilegia adoxoides (DC.) Makino, but can be readily distinguished by a thick underground stem, shallowly lobed leaflets, larger flowers, (4–)6 staminodes and conspicuously rugose tuberculate seed surface.
Ranunculaceae , Isopyroideae , Hallasan National Park, Eudicots
The genus Semiaquilegia Makino is well-known for tuberous-perennial herbaceous plants of the family Ranunculaceae and hitherto consisted of a sole species, S. adoxoides (DC.) Makino which is mainly found in China, Korea, Japan and Taiwan (
Semiaquilegia is currently included in the tribe Isopyreae, subfamily Isopyroideae (Kadota, 2006), being widely recognised as closely related to Aquilegia L. based on petal evolution (
During a recent floristic survey, one species of Semiaquilegia which does not appear to be similar to previously reported species was collected at Hallasan National Park in Jeju-do, Republic of Korea. After examination of the various flora and herbarium specimens of Korea and adjacent countries as well as relevant literature (
The morphological observations of the new species were conducted based on living plants as well as dry specimens, between 2016 and 2017. The photographs in the field were captured by using a Nikon Coolpix P510 camera. The measurements of the morphological characters were performed by using a digital vernier caliper and data derived from field notes. The flowering and fruiting periods are given as cited on the collector’s labels. Type material has been deposited in the Korea National Arboretum (
Semiaquilegia quelpaertensis is most similar to S. adoxoides in general vegetative and floral morphology, but obviously differs from the latter by the shallowly lobed leaflets, larger flowers, (4–)6 staminodes and conspicuously rugose tuberculate seed surface (Table
Species | S. adoxoides | S. guangxiensis | S. quelpaertensis | |
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Source |
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This study |
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This study |
Underground stem | thick, 1.5 cm in diameter | thin, 1–2 cm long, 0.3–0.5 cm in diameter | thick, 2–5 cm long, 0.5–2 cm in diameter | thick, 3–5 cm long, 0.6–1 cm in diameter |
Basal leaves | ternate; leaf blade suborbicular or reniform, 1–3.5 cm long, 2–4.5 cm wide; segments incised | ternate or biternate; leaf blade ovate, suborbicular or reniform, both length and width 1.2–3.0 cm; segments incised | ternate, rarely biternate; leaf blade ovate to triangular ovate , both length and width 3–9.5 cm; segments shallower lobed | ternate; leaf blade ovate to triangular ovate, both length and width 2–3.5 cm; segments shallower lobed |
Flower | 4–6.5 mm in diameter | 4–6 mm in diameter | 15–25 mm in diameter | 8–10 mm in diameter |
Pedicel | 0.3–1.2 cm long | 1–2.5 cm long | 2.5–12 cm long | 0.8–2.5 cm long |
Sepals | oblong-lanceolate, 4–6.5 mm long; apex obtuse, but sometimes acute | narrowly elliptic, 4–6 mm long, 1.2–2.5 mm wide; apex acute | broadly elliptic or obovate, 10–20 mm long, 5–10 mm wide; apex rounded or obtuse | narrowly elliptic, 7–8 mm long, 3.0–3.5 mm wide; apex obtuse |
Petals | spatulate, 3.0–3.5 mm long, yellow, apex truncate | spatulate, 2.5–3.5 mm long, yellow, base cystic, apex subtruncate, not folded | spatulate, 4–6 mm long, yellow, base tubular, apex retuse, ventrally folded | spatulate, 3.0–3.5 mm long, yellow, base cystic, apex subtruncate, not folded |
Androecium | 9–14, inserted into petals; staminodes 1–4, half as long as stamen | 8–14, inserted into petals; staminodes 2, as long as filaments | 20–30, exserted from petals; staminodes ca. 10, 1/2 as long as filaments | 16–22, inserted into petals; staminodes (4–)6, 1/2–2/3 as long as filaments |
Anther colour | light yellow | yellow | yellow or blackish | yellow |
Follicle | 9–10 mm long, ca. 3 mm wide | 6–7 mm long, ca. 2 mm wide | ca. 10 mm long, ca. 3 mm wide | 7–9 mm long, ca. 3 mm wide |
Seeds | 1.5 mm long, rugose | ca.1 mm long, rugose | ca. 1.5–2.5 mm long, densely rugose | ca.1.5–2.0 mm long, conspicuously rugose |
KOREA. Prov. Jeju-do, Jeju-si, Eoseungsaengak, Hallasan National Park, elevation 815 m, 33.4026818°N, 126.4954984°E, 18 April 2017, K.H. Lee 0300 (holotype
Herbs perennial, 15–25 cm tall. Roots thin and fibrous. Underground stem tuberous, oblong, 3–5 cm long, 0.6–1 cm in diameter, light brown. Aerial stems erect, villose, apically branched. Basal leaves spirally-alternate, congested on a basal rosette, persistent in mature individuals, several, 1-ternately compound, glabrous, sheathed; petiole 6–12 cm long, villose; leaflets ovate to triangular ovate, 2.0–3.5 cm long, 2.0–3.5 cm wide, 3-parted, segments 2- or 3-lobed. Cauline leaves spirally-alternate, distributed along the stem, 1–2, shortly petiolate or sessile, similar to basal leaves but smaller. Inflorescence monochasial cymes, 2–5-flowered; bracts entire, 3-lobed, 3–5 mm long, oblanceolate to obovate; bracteoles 2, 2–3 mm long, oblanceolate. Flowers actinomorphic, 8–10 mm in diameter, pendulous; pedicel slender, 0.8–2.5 cm long, villose with patent hairs, intermixed with glandular hairs; sepals 5, petaloid, white, usually basally to medially tinged with pink or purple, narrowly elliptic, 7–8 mm long, 3.0–3.5 mm wide, base cuneate, apex obtuse; petals 5, greenish yellow to yellow, spatulate, 3.0–3.5 mm long, apex subtruncate, nectaries cylindrical, shortly spurred; stamens 16–22, filaments 3 mm long, filiform, white, anthers globose, 0.5 mm in diameter, pale yellow; staminodes (4–)6, white, petaloid, membranous, linear-lanceolate, 1/2–2/3 as long as filaments, glabrous; pistils 4–5, glabrous, style ca. 1/6–1/5 as long as ovary, stigma capital. Follicles 4–5, free, widely divergent, ovoid-oblong, 7–9 mm long, ca. 3 mm wide, apically with a small beak due to the persistent style, striate, striae transversely raised. Seeds obovoid, 1.5–2.0 mm long, blackish brown, conspicuously rugose tuberculate seed surface.
Semiaquilegia quelpaertensis D.C. Son & K. Lee, illustrations. A Habit B Flower (lateral view) B’ Flower (top view) C Flower with sepals cut away to show petals D Sepals E Flower with some sepals and petals removed, showing stamens and styles F Petals G Flower with sepals, petals and some stamens removed, showing stamens, staminodes and pistils H Stamens I Staminodes J Pistils (after fertilisation) K Inflorescence in fruiting L Follicles (immature) L’ Dehisced follicles, showing seed M Seed N Inflorescence O Petiole P Leaflet (abaxial surface). Illustrations by Heesoo Kim.
Flowering time: April–early May; fruiting time: May.
Endemic to the Province Jeju-do (Republic of Korea).
Keun-gae-gu-ri-bal-top (큰개구리발톱; new Korean name).
Semiaquilegia quelpaertensis grows in submontane broadleaf forests and in moist valleys at 800–850 m elevation. Its habitat is dominated by Styrax obassis Siebold & Zucc. (Styracaceae), with Dryopteris dickinsii (Franch. & Sav.) C. Chr. (Dryopteridaceae), Elatostema umbellatum (Siebold & Zucc.) Blume (Urticaceae), Pimpinella hallaisanensis (W. Lee & G. Jang) G. Jang, W.K. Paik & W. Lee (Apiaceae), Cardamine tanakae Franch. & Sav. (Brassicaceae), Peracarpa carnosa var. circaeoides (F. Schmidt ex Miq.) Makino (Campanulaceae), Viola boissieuana Makino (Violaceae) and Anemone stolonifera Maxim. (Ranunculaceae).
The specific epithet of the new species is derived from the type locality, Jeju-do, Republic of Korea.
Currently, the new species is only known at the type locality and the population size is about 200 mature individuals. It seems that the new species can be ascribed as Endangered (EN) according to the IUCN Red List categories and criteria (
Semiaquilegia quelpaertensis shows morphological similarities with S. adoxoides concerning its narrowly elliptic sepals, shorter pedicel and petals subtruncate at apex. Despite these similarities, there are clear differences between these two species, such as the lobed shape of leaflets, the size of the flowers, the surface of seeds and the length and number of staminodes (Table
This study was supported by the project ‘Research on unidentified native plant names in Korea (KNA1-1-16, 15-1)’ funded by the Korea National Arboretum. We would like to thank the anonymous reviewers for their valuable comments and suggestions.