Prunus tongmuensis X.G.Yi & X.R.Wang, 2024

Yi, Xiangui, Dong, Jingjing, Chen, Jie, Zhou, Huajin, Wu, Tong, Gao, Shucheng, Chen, Xiangzhen, LI, Meng & Wang, Xianrong, 2024, Molecular and morphological evidence support a new species of Rosaceae Prunus subg. Cerasus from Wuyishan National Park, southeast China, PhytoKeys 237, pp. 269-279 : 269

Prunus tongmuensis X.G.Yi & X.R.Wang sp. nov.

Figs 3 , 4

Diagnosis.

This species closely resembles P. dielsiana in leaf shape, however, it can be distinguished by no glands at the end of teeth (obvious glands at the end of tooth in P. dielsiana ), petiole yellow villous (petiole white villous in P. dielsiana ), 1-2 glands at leaf base (1-3 glands on the petiole in P. dielsiana ), Flowers 1-4 (2, 3), flowers opening at same time as leaves (flowers 3-6, flowers opening before leaves in P. dielsiana ), sepal erect or spread (sepal reflexed in P. dielsiana ), ripening dark purple (ripening red in P. dielsiana ).

Type.

China. Fujian Province: Tongmuguan, Wuyishan National Park , 27°74.91'N, 117°67.49'E, elev. ca. 728 m, 10 March, 2018, X.G. Yi 201832301 NF-201832302 (Holotype) .

Description.

Trees or shrubs, 3-10 m tall. Bark grayish brown. Young branchlets yellow-green, densely yellow villous. Winter buds ovoid, 2-4 mm. Stipules narrowly lorate, slightly shorter than petiole, caducous, margin glandular-serrate. Petiole 5 × 8 mm, densely covered with yellow villi. Leaf blade obovate, elliptic, or obovate-oblong, 4-10 × 2-4 cm, base rounded to broadly cuneate, margin biserrate or sharply serrulate, teeth with no gland; main and secondary veins densely covered with villous, secondary veins 7-12. Inflorescences umbellate, 1-4-flowered, involucral bracts brown, long elliptic, 6-8 mm long, ca. 3 mm in width, adaxially densely covered with appressed villous; bracts ovate, 1-3 mm in diam., margin strongly fimbriate, fimbria with a long-stalked gland. Flowers opening before leaves or nearly at the same time. Pedicel 0.5-1(-2) cm, spreading white villous. Hypanthium tubular-campanulate, 3-5 × 3-4 mm, outside densely villous, pubescent. Sepals usually reddish, triangular, 0.4-5.5 cm, erect, margin entire, apex acute to obtuse. Petals white or pink, ovate to obovate, apically entire or emarginate. Stamens 35-40, shorter than petals. Style as long as stamens, glabrous, stigma disciform. Drupe dark purple, ovoid, 1-1.2 × 0.5-0.8 cm; endocarp ovoid, 0.6-0.8 × 0.4 cm, deeply furrowed and pitted on the lateral sides, apex obtuse. Flowers Mar.-Apr., fruits in May.

Etymology.

Referring to the locality (Tongmuguan) where this new species was found.

Distribution and habitat.

This species is currently known only from Wuyishan National Park, Fujian and Jiangxi Province. This species grows in various habitats such as the margins of evergreen broad-leaved forests, valleys, or roadsides, at an altitude of 600-1000 m.

Figures

Figure 3. Prunus tongmuensis X. G. Yi & X. R. Wang A flowering branch B fruiting branch C flower D fruit E pistil and stamen F petal G sepal H bract I involucral bract J leaf apex K two glands at the base of leaf L teeth.

Figure 4. Prunus tongmuensis X. G. Yi et X. R. Wang A habitat B-G flowering branch H pollen grain I, J leaves K fruiting branch L young fruit branch M dark purple fruits.