Corresponding author: Da-Fang Cui (
Academic editor: M. Reginato
A new species of the genus
Zeng S-J, Xu Y-C, Wang G-T, Jia P, Cui D-F (2021)
The genus
The distribution map of
Here we describe a new species of
The morphological data collected for the species described here are based on living plants and specimens collected in the field. Voucher specimens were deposited at the herbaria CANT, IBSC, KUN and PE (acronyms according to Index Herbariorum in
We collected and sequenced the specimen (S.Jin Zeng 397) and then built a phylogenetic hypothesis with other sequences gathered from Genbank. Total genomic DNA was extracted from fresh material using a modified CTAB procedure (
Amplification and sequencing were performed according to
To determine the phylogenetic position of the new species in the Sonerileae clade, 45 species from 22 genera (including 2 species of
The aligned sequence matrix contained 2694 characters. Summary features of sampled sequences are summarised in Suppl. material
Phylogenetic relationships of Sonerileae based on combined nuclear ITS and two plastid makers (
A detailed comparison of this new species and
Morphological comparisons of
Items/species |
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Petioles | abaxially ribbed, densely pale yellow puberulent trichomes | abaxially not ribbed, densely reddish hispid trichomes |
Leaf blades | abaxially densely pale yellow puberulent trichomes on veins | abaxially densely reddish villous and puberulent trichomes on veins |
Petals | purple with a small white apical patch | dark red with a large white apical patch |
Connectives of longer stamens | basally with a distinct dorsal short spur | basally without a distinct dorsal spur |
Capsules | wingless | narrowly winged |
China. Guangdong: Huizhou, Longmen, on damp slopes of ravines in broad-leaved forests, 115 m, 13 October 2019,
The new species
Perennial herbs, succulent, with raphides in both vegetative and reproductive parts. Stems stoloniferous, 3–5 cm long, internodes indistinct. Leaves in a basal or sub-basal rosette, decussate; petiole somewhat square in cross-section, 6–21 cm long, abaxially ribbed, densely pale yellow puberulent; leaf blade cordate, 16–30(–58) × 16–34(–54) cm, slightly fleshy, base cordate, apex subrounded, margin ciliate and irregular abruptly denticulate, adaxial surface green, glabrous, abaxial surface usually purple, densely pale yellow puberulent on veins; secondary veins 3–4 on each side of the midvein, conspicuous; tertiary veins numerous, parallel, and connecting with secondary veins. Inflorescences terminal, scorpioid cymes, 12–50 flowers; peduncle nearly rounded in cross-section,13–27 cm long, densely pale yellow puberulent; bracts linear, ca. 0.1 cm, puberulent, caducous. Pedicel nearly rounded in cross-section, 1.2–2.0 cm long, puberulent. Hypanthium funnelform to cup-shaped, 5-sided, wingless, ca. 0.6 × 0.6 cm, puberulent, apex truncate. Calyx lobes triangular-semiorbicular, less than 0.1 cm, puberulent, apex apiculate. Petals purple, broadly obovate, ca. 1.0–1.5 × 0.7–1.0 cm, oblique, almost rhomboid, apex white, truncate and oblique. Stamens 10, 5 long antisepalous and 5 short antipetalous, arranged in 2 whorls. Antisepalous (longer) stamens 1.7–2.2 cm long; anthers 0.7–1.0 cm long; connective decurrent, basally with 2 ventral tubercles and a dorsal short spur. Antipetalous (shorter) stamens 1.2–1.5 cm long; anthers 0.6–0.8 cm long; connective slightly decurrent, basally with 2 ventral tubercles and a dorsal short spur. Ovary half-inferior, ovoid, apex with membranous crown; crown 5-lobed, lobe margins ciliate; placentas short stalked. Capsule funnelform cup-shaped, apex truncate, dehiscence poricidal; crown woody, 5-lobed, exserted ca. 0.2 cm beyond calyx, margin irregularly denticulate. Seeds more than 100, light brown, ca. 0.1 cm long.
Flowering in October–November, fruiting in January–March.
The specific epithet combined from
Hui Zhou Hu Yan Hua (Chinese pronunciation); 惠州虎颜花 (Chinese name).
Comparison of
About 1000 mature
China. Guangdong: Huizhou, Longmen, on damp slopes of ravines in broad-leaved forests, 121 m, 25 November 2017,
We thank Dr Yi-Hua Tong for his valuable comments on the manuscript, Mr Ding-Han Cui for preparing the line drawing and Mr Jing-Bo Ni for his kind assistance with our field survey.
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