朝鲜蒲儿根 chao xian pu er gen

Senecio koreanus Komarov, Trudy Imp. S.-Peterburgsk. Bot. Sada 18: 421. 1901; Sinosenecio koreanus (Komarov) B. Nordenstam.

Herbs, with leafy stems. Rhizomes 10-15 mm in diam., clad in persistent brown petiole bases. Stem solitary, erect, green or purplish, 30-60 cm tall, 3-4 mm in diam. at base, simple, sparsely arachnoid or pubescent, glabrescent. Radical leaves mostly withered by anthesis, long petiolate; petiole 5-17 cm, slender, sparsely arachnoid or subglabrous, not winged, basally slightly expanded; blade abaxially pale green, adaxially green, deltoid or deltoid-cordate, 4-7 × 2.5-4 cm, abaxially sparsely arachnoid-tomentose, adaxially sparsely pubescent, base broadly cordate, margin coarsely dentate with deltoid mucronulate teeth, apex acute-acuminate. Lower and median stem leaf petioles 8-13 cm, slightly winged, basally subamplexicaul; blades similar in shape and size to basal leaves, 3-8 × 3-6 cm, base cordate or hastate. Upper stem leaves shortly petiolate; blades gradually smaller upward, deltoid-lanceolate to lanceolate, base cuneate. Capitula rather numerous, in terminal corymbs; peduncles 2-3.4 cm, slender, with or without a basal linear bract, usually not bracteolate, glandular puberulent or subglabrous. Involucres campanulate, ca. 5 × 4-6 mm, not calyculate; phyllaries ca. 13, uniseriate, oblong or oblong-linear, herbaceous, sparsely puberulent, margin scarious, apically acute to obtuse or shortly acuminate, and white ciliate. Ray florets ca. 7; corolla tube ca. 2.5 cm, glabrous; lamina oblong, ca. 8 × 2.5-3 mm, 4-veined, apically 3-denticulate, obtuse. Disk florets many; corolla yellow, 5.5-6 mm, with ca. 2.5 mm tube and campanulate limb; lobes oblong-lanceolate, ca. 1.5 mm, apically acute. Anthers oblong, ca. 1.7 mm, basally obtuse; appendages ovate-oblong. Style branches recurved. Achenes cylindric, 2-2.5 mm, glabrous, ribbed. Pappus white, ca. 5 mm. Fl. Jun, fr. Aug.

Wet forests. Jilin (Changbai Shan), Liaoning [Korea].

Until recently, Tephroseris koreana was treated in Sinosenecio, but it was transferred to Tephroseris on the basis of molecular and other evidence (Nordenstam & Pelser, Compositae Newslett. 49: 5. 2011).

However, one of us (Jeffrey) does not accept the transfer of Sinosenecio koreanus to Tephroseris; i.e., phenetically, S. koreanus is Sinosenecio, not Tephroseris, as shown by the combination of leaf shape and venation, low phyllary and ray floret numbers, short ray floret and disk floret corolla tubes, and campanulate disk floret corolla limbs.