Youngia gongshanensis Y. S. Chen & R. Ke, 2016
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publication ID |
https://doi.org/ 10.11646/phytotaxa.275.2.5 |
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DOI |
https://doi.org/10.5281/zenodo.13655700 |
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persistent identifier |
https://treatment.plazi.org/id/039D4975-B728-FFE9-6FBD-F8EE61F8F852 |
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treatment provided by |
Felipe |
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scientific name |
Youngia gongshanensis Y. S. Chen & R. Ke |
| status |
sp. nov. |
Youngia gongshanensis Y. S. Chen & R. Ke View in CoL , sp. nov. ( Figures 2 View FIGURE 2 & 4 View FIGURE 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 About KUN ; isotypes KUN0737419 About KUN , 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 View 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) .
| T |
Tavera, Department of Geology and Geophysics |
| KUN |
Kunming Institute of Botany, Chinese Academy of Sciences |
| PE |
Institute of Botany, Chinese Academy of Sciences |
| H |
University of Helsinki |
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