Youngia gongshanensis Y. S. Chen & R. Ke 2016, sp. nov.
Creators: name: Ke, Rui
name: Chen, You-Sheng
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Youngia
Youngia gongshanensis

description: Youngia gongshanensis Y. S. Chen & R. Ke, sp. nov. (Figures 2 & 4, A–B)   
 Type: — CHINA. Yunnan Province, Gongshan County, from Dala [Bingzhongluo] to Sula bridge, Nujiang valley, mixed forest margin, 1700 m, 25 June 1938, T. T. Yü 22027 (holotype KUN0737418; isotypes KUN0737419, PE01690806, PE01690805).   
Perennial herbs. Taproot slender with shoot-bearing lateral roots. Stem ca. 2 mm in diameter, about 20–43 cm tall, solitary, erect, unbranched, glabrous to sparsely pubescent. Basal leaves long petiolate; petiole 5–40 mm long, blade elliptic to oblong, both surfaces glabrous, 10–12 × 3–3.5 cm, lyrately pinnatifid; lateral lobes 4–5 pairs, opposite to obliquely opposite, triangular-ovate, 4–12 × 4–14 mm, margins subentire or mucronate, apex acute and mucronate; terminal lobe the largest, ovate to elliptic, ca. 6 × 3.4 cm, margin sparsely toothed and mucronate, apex acuminate to caudate-acuminate. Lower and middle leaves shortly petiolate; petiole 5–12 mm long, blade elliptic, both surfaces glabrous, 6–8.5 × 2.3–3 cm, lyrately pinnatisect; lateral lobes 2–4 pairs, opposite to obliquely opposite, triangular-ovate, 3–10 × 3–11 mm, margins subentire or mucronate, apex acute and mucronate; terminal lobe the largest, ovate to elliptic, 4–6 × 2.2–3 cm, margin sparsely toothed and mucronate, apex acuminate to caudate-acuminate. Upper leaves shortly petiolate to nearly sessile; blade oblanceolate to elliptic, 5.5–8.8 × 1.5–2.7 cm, apex acuminate, base attenuate, margin entire and mucronate, lateral lobes 0–1 pairs. Synflorescence paniculiform, with several axillary more or less corymbiform smaller partial synflorescence with 3–14 small capitula; axillary synflorescence usually with 1–2 clustered bracts at the base or with small bracts at the node of the peduncles; bractal leaves ovate to elliptic. Capitula with 5–6(–9) florets; peduncles slender and glabrous. Involucres cylindric, 2–3 mm in diameter, 7–10 mm long. Phyllaries in 3–4 rows, margin white scarious; outermost phyllaries ovate, ca. 1.0 × 0.7 mm, apex obtuse and ciliate; middle phyllaries ovate-oblong, ca. 2.5 × 0.6 mm, apex acute; innermost phyllaries linear-oblong, 7–10 × ca. 1.5 mm. Florets yellow, tube ca. 2.8 mm long, ligule ca. 4.2 mm long, ca. 1.2 mm wide, apex 5-toothed. Anther tube yellow, 1–1.2 mm long. Style branches ca. 1.2 mm long. Achene dark brown, subfusiform, 2–3 mm long; ribs 11–14, unequal, ribs finely spiculate. Pappus white, 3–6 mm long.  
 Phenology: —Flowering from late May to early August.   
 Distribution and habitat: — Youngia gongshanensis is currently known only from Bingzhongluo, Gongshan County, Yunnan Province, China (see Figure 5). The new species grows along streamside in Nujiang valley at altitudes of 1700–1800(–2750) m.   
 Additional specimens examined: –– CHINA. Yunnan, Gongshan County, from Danshan to Bingzhongluo, streamside, 1700 m, 2 May 1960, South Water to North Exped. (Northwest Yunnan Group) 8737 (KUN, PE); Gongshan County, Bingzhongluo, from Sijitong to Gawagapu, 1800(–2750) m, 1 August 2013, X. H. Jin et al., ST 1609 (PE).
description: Published as part of Ke, Rui & Chen, You-Sheng, 2016, A new species of Youngia (Asteraceae, tribe Cichorieae) from Yunnan, China, pp. 140-148 in Phytotaxa 275 (2) on pages 143-145, DOI: 10.11646/phytotaxa.275.2.5, http://zenodo.org/record/13655682