Ranunculus chongzhouensis W.T. Wang, Bull. Bot. Res., Harbin 35(5): 645. 2015

Fei, Wen-Qun, Yuan, Qiong & Yang, Qin-Er, 2023, Ranunculus maoxianensis (Ranunculaceae), a new species from northwestern Sichuan, China, with an emended description of R. chongzhouensis, the putative closest ally of the new species, PhytoKeys 219, pp. 77-96 : 77

publication ID

https://dx.doi.org/10.3897/phytokeys.219.96510

persistent identifier

https://treatment.plazi.org/id/CE2C1A7C-E94B-5A48-ADB7-735BB31B67B0

treatment provided by

PhytoKeys by Pensoft

scientific name

Ranunculus chongzhouensis W.T. Wang, Bull. Bot. Res., Harbin 35(5): 645. 2015
status

 

Ranunculus chongzhouensis W.T. Wang, Bull. Bot. Res., Harbin 35(5): 645. 2015

Figs 3 View Figure 3 -10 View Figure 10

Type.

China. Sichuan: Chongzhou city, Anzihe Nature Reserve, Jiguan Shan , alt. 3000 m, in forests, 27 July 2007, Z.B. Feng, D.H. Zhu & X.J. Li 4171 (holotype: PE!; isotypes: WCSBG!) .

Description.

Herbs perennial, terrestrial. Roots fibrous, slender. Stems 10-25 cm tall, ascending or erect, branched, puberulous. Basal leaves 5-8, 3-lobed or 3-partite, long petiolate; petioles 4-10 cm long, sparsely puberulous; blades 2.2-3.1 × 3.1-3.7 cm, reniform, chartaceous, adaxially green, appressed puberulous with hairs 0.55-0.85 mm long, abaxially light green, glabrous, sometimes puberulous, base cordate, central segment 0.6-1 × 0.9-1.4 cm, obtrapezoid or obovate-obtrapezoid, margin 3-crenulate, lateral segments 0.8-1.2 × 1.5-2.3 cm, obliquely flabellate, unequally 2-lobed, margin crenulate. Lower cauline leaves 1 or absent, similar to basal ones but smaller. Upper cauline leaves 2-3, 3-sected, subsessile, segments 1.1-1.5 × 0.3-0.9 mm, obliquely flabellate, lanceolate to linear, margin entire or 3-4-lobed. Inflorescences terminal, 4-10-flowered. Flowers 1.4-1.6 cm in diameter; pedicels 5-10 cm long, appressed puberulous; receptacles 3-5 mm long, clavate, puberulous; sepals 5, 3.9-4.5 × 2.5-3 mm, elliptic to obovate, green tinged with yellowish, adaxially glabrous, abaxially puberulous; petals 5(-6), 6-7 × 4.5-5 mm, obovate, yellow, glabrous, apex truncate or subtruncate, nectary pit without a scale, claw ca. 0.5 mm long; stamens 12-18, filaments ca. 2 mm long, narrowly linear, anthers ca. 1 mm long, oblong; gynoecium ellipsoid; carpels 20-40, ovaries ca. 0.9 × 0.8 mm, ovoid or widely ovoid, laterally flattened, biconvex, puberulous, styles ca. 0.9 mm long, glabrous, apex slightly recurved. Aggregate fruit ca. 7 × 5 mm, ellipsoid; achenes ca. 2 × 1.5 mm, obliquely or widely ovoid, laterally flattened, biconvex, puberulous, styles ca. 1 mm long, persistent, straight or apex recurved.

Phenology.

Flowering from June to July; fruiting from July to August.

Distribution and habitat.

Ranunculus chongzhouensis is distributed in Baoxing, Chongzhou, Dayi, Heishui, Luding, Songpan, and Xiaojin in Sichuan province, China (Fig. 13 View Figure 13 ). It grows in forests or meadows at elevations of 2900-4150 m above sea level.

Additional specimens examined.

China. Sichuan: Baoxing, W.Q. Fei & H.S. Wu 371 (IBSC); Chongzhou, W.Q. Fei 915 (IBSC), W.B. Ju, L. Zhang & D.K. Chen AZH01296 View Materials (CDBI); Dayi, W.Q. Fei 577 (IBSC), J.P. Luo & H.M. Li 613 (IBSC), Y.P. Zeng, Y.F. Luo & Y.Q. Tao 149 (IBSC); Heishui, W.Q. Fei 719 (IBSC); Luding, W.Q. Fei 754 (IBSC); Songpan, W.Q. Fei 725 (IBSC); Xiaojin, W.Q. Fei & H.S. Wu 395 (IBSC) .