taxonID	type	description	language	source
B43CE9C4D3B05D298B1ACF89932C6ED6.taxon	diagnosis	Diagnosis. The new species is most similar to P. sinensis, P. rupestris, and P. xingshanensis, sharing hairs that covered the leaves and stems, lobed leaf blade, distinctly petiole and distinctively broad and flat-bottomed calyx. However, the new species is distinguished from the latter three mainly by its branched and stout rhizomes usually up to 40 cm, yellow corollas with a distinct fan-shaped reddish-brown blotch at the base of lobes, and short glandular hair on aboveground parts (Figs 1 – 4). The main morphological distinctions between P. jiangyouensis, P. sinensis, P. rupestris, and P. xingshanensis are summarized in Table 1.	en	Gu, Jiu-lin, Wang, Hua-dong, Lin, Hong-qiang, Jiang, Xiao-qi, Shuai, Tian, Wu, Zhi-kun (2025): Primula jiangyouensis (Primulaceae), a new species of Primula sect. Auganthus from Sichuan, China. PhytoKeys 260: 25-35, DOI: 10.3897/phytokeys.260.158039
B43CE9C4D3B05D298B1ACF89932C6ED6.taxon	description	Description. Perennial herb, the entire aboveground parts densely covered with short glandular hairs; roots purplish-brown and pale purple, few in number, fibrous and brittle; rhizome woody, stout and elongated, up to 40 cm long and 1 cm thick, usually with 2 – 8 branches, bearing numerous persistent dry leaf sheath from base to apex. Leaves mostly clustered at the apex of the rhizome, rosette, including petiole 8 – 24 cm long; petiole 4 – 16 cm long, densely covered with short glandular hairs, base expanded, pale red or green, brittle when fresh; leaf blade oblong-ovate to ovate-orbicular, 4 – 8 cm long, 2 – 6 cm wide, apex obtuse-rounded, base truncate and oblique, margin pinnately 4 – 6 - lobed, parted up to 1 / 2 or more of the blade, lobes oblong, each side with 3 – 12 obtuse notched teeth, slightly thick when fresh, papery when dry, mid-rib prominent, lateral veins 5 – 7 pairs, slightly concave adaxially and densely covered with short glandular hairs, raised abaxially and densely glandular-hairy along veins. Scape 5 – 35 cm tall, green; umbels 1 – 5 - whorled, each whorl with 2 – 11 flowers. Bracts lanceolate, entire, 5 – 10 mm long, acute at apex, glandular-hairy. Pedicels 2 – 6 cm long, glandular-hairy. Calyx 6 – 9 mm long, base inflated and hemispherical, 4 – 6 mm in diameter, enlarging in fruit to 8 – 12 mm in diameter, mostly 5 - lobed (rarely 4 or 6), cut up to half its length, lobes triangular, densely glandular-hairy on both surfaces. Corolla yellow, glandular-hairy outside, limb 1.5 – 3.2 cm in diameter, throat yellow, without an annular appendage; lobes broadly obovate, apex bifid, margin entire or lacerate, with a fan-shaped reddish-brown blotch at the base. Flower heterostylous, Pin flowers: corolla tube 14 – 19 mm long, stamens inserted near the middle of the tube, style 10 – 18 mm long, nearly reaching or slightly exceeding the throat; thrum flowers: corolla tube 15 – 19 mm long, stamens inserted 10 – 15 mm from base of corolla tube, style 4 – 7 mm long. Capsule ovoid, 5 – 10 mm in diameter, shorter than the calyx. Seeds globose or ovoid, about 1.0 mm in diameter, finely vesicular-surfaced.	en	Gu, Jiu-lin, Wang, Hua-dong, Lin, Hong-qiang, Jiang, Xiao-qi, Shuai, Tian, Wu, Zhi-kun (2025): Primula jiangyouensis (Primulaceae), a new species of Primula sect. Auganthus from Sichuan, China. PhytoKeys 260: 25-35, DOI: 10.3897/phytokeys.260.158039
B43CE9C4D3B05D298B1ACF89932C6ED6.taxon	distribution	Distribution and habitat. The new species is currently known from the type locality near Jingtai village, Cangwangzhai Scenic Area, Yongshen town, Jiangyou County, Sichuan Province, China, and is mostly found on shady ledges of limestone cliffs, at an altitude of 1070 – 1550 m (Fig. 1, Map 1).	en	Gu, Jiu-lin, Wang, Hua-dong, Lin, Hong-qiang, Jiang, Xiao-qi, Shuai, Tian, Wu, Zhi-kun (2025): Primula jiangyouensis (Primulaceae), a new species of Primula sect. Auganthus from Sichuan, China. PhytoKeys 260: 25-35, DOI: 10.3897/phytokeys.260.158039
B43CE9C4D3B05D298B1ACF89932C6ED6.taxon	etymology	Etymology. The specific epithet of the new species is taken from the Chinese Pinyin “ Jiangyou ”, the name of the county in northern Sichuan, China, where the type specimen was collected (Map 1).	en	Gu, Jiu-lin, Wang, Hua-dong, Lin, Hong-qiang, Jiang, Xiao-qi, Shuai, Tian, Wu, Zhi-kun (2025): Primula jiangyouensis (Primulaceae), a new species of Primula sect. Auganthus from Sichuan, China. PhytoKeys 260: 25-35, DOI: 10.3897/phytokeys.260.158039
