松潘蒲儿根 song pan pu er gen

Senecio sungpanensis Handel-Mazzetti, Anz. Akad. Wiss. Wien, Math.-Naturwiss. Kl. 62: 149. 1925.

Herbs, stoloniferous, with leafy stems. Rhizomes 6-8 mm in diam., clad in persistent brown petiole bases. Stems solitary, erect, 40-50 cm tall, 5-6 mm in diam. at base, simple, purplish below, at first sparsely white arachnoid-tomentose, glabrescent. Radical leaves withered by anthesis; lower stem leaves long petiolate; petiole 6-7 cm, somewhat white arachnoid, basally expanded; blade adaxially green, reniform, 3-3.5 × 4-4.5 cm, abaxially densely white tomentose, adaxially sparsely shortly pubescent to subglabrous, palmately divided into 5-7 lobes, or undivided, only denticulate; lobes broadly deltoid or ovate-deltoid, usually coarsely few denticulate and apiculate. Upper stem leaves similar, but shortly petiolate, smaller. Uppermost leaves lanceolate, margin denticulate or entire. Capitula 2-2.5 cm in diam., usually 4 or 5 arranged in terminal subumbelliform corymbs; peduncles 2-5 cm, sparsely arachnoid, basally bracteate and sometimes with a median subulate bracteole. Involucres broadly campanulate, ca. 10 × 7-12 mm, not calyculate; phyllaries 15-17, oblong-elliptic, 2-2.5 mm wide, herbaceous, sparsely villous, glabrescent, upper margin purplish red and ciliate, apically acute. Ray florets 12 or 13; corolla tube 4.5-5 mm, glabrous; lamina yellow, oblong, ca. 9 × 2 mm, apically 3-denticulate. Disk florets many; corolla yellow, 6.5-7 mm, with ca. 3.8 mm tube and campanulate limb; lobes lanceolate, ca. 1.5 mm, apically acute. Anthers ca. 1.5 mm, basally obtuse to rounded, appendages lanceolate. Style branches ca. 1 mm. Achenes cylindric, ca. 1.8 mm, glabrous, papillate. Pappus white, 5.5-6 mm. Fl. Jun-Jul, fr. Jul-Aug. 2n = 48*.

● Montane meadows, woods; 3300-4300 m. Sichuan (Hongyuan, Songpan).

Sinosenecio sungpanensis differs from S. euosmus in the leaf blade abaxially white tomentose, involucres larger, and petiole bases only expanded but never auriculate. It is very similar to S. fangianus in posture, the palmately lobed leaf blade abaxially white tomentose, the petioles basally expanded but never auriculate, and the achenes glabrous yet papillate. It differs from S. fangianus in the leaf blade shallowly 5-7-lobed or undivided, only denticulate, the lobes broadly deltoid or ovate-deltoid, and the phyllaries purplish on upper margin.