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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Erigeron

21. Erigeron pseudotenuicaulis Brouillet & Y. L. Chen, Fl. China. 20-21: 642. 2011.

细茎飞蓬 xi jing fei peng

Replaced synonym: Erigeron tenuicaulis Y. Ling & Y. L. Chen, Acta Phytotax. Sin. 11: 418. 1973, not Erigeron tenuicaulis M. E. Jones, Contr. W. Bot. 12: 44. 1908.

Herbs, perennial, 9-25 cm tall; rhizome woody, tortuous or crowded in tuber, collar clad with marcescent petiole bases, simple or branched. Stems slender, 0.6-1.5 mm in diam., erect or ascending, branched in middle or simple, green, sparsely strigose and strigillose, denser in upper part, sometimes glabrate below, sometimes short-stipitate glandular in upper part. Leaves: basal rosulate, present at anthesis, narrowly winged long petiolate, blade narrowly oblanceolate or oblanceolate-spatulate, 1.5-9 × 0.2-0.4 cm, surfaces strigillose, 3-veined, base attenuate, margin entire or sometimes 2-4-serrulate, strigillose-ciliate, apex obtuse or rounded; lower cauline identical to basal, shortly petiolate, mid and upper sessile, blade linear or linear-lanceolate, 1-2 × 0.1-0.2 cm, surfaces strigillose, short-stipitate glandular, 1-3-veined, margin strigillose-ciliate, apex shortly acuminate. Capitula solitary or 2 or 3 in corymbiform synflorescences, 1-1.5 mm in diam.; peduncles slender; bracts 1-3, linear or subulate. Involucre hemispheric, 3-4 × 8-10 mm; phyllaries 3-seriate, green, linear-lanceolate, ca. 0.5 mm wide, shorter than disk florets, abaxially sparsely strigillose, densely short-stipitate glandular, apex acute to acuminate, outer ca. 1/2 as long as inner, inner 3-4 mm, margin narrowly scarious. Ray florets 2- or 3-seriate, reddish, 6-7 mm, equaling or ± longer than disk florets, tube 2.5-3 mm, hairy, lamina ca. 0.3 mm wide, involute; disk florets yellow, 3.5-4 mm, tube 1-1.5 mm, limb narrowly funnelform, lobes lanceolate, ca. 0.4 mm, reddish. Achenes oblong, compressed, ca. 2 mm (immature), sparsely strigose, 2-veined. Pappus (immature) yellowish brown, 2-seriate, outer bristles very short, inner ca. 4 mm. Fl. Jul-Sep.

● Stony open slopes; ca. 2200 m. SW and W Sichuan (Kangding, Muli).

This species differs from Erigeron himalajensis by its slender stems, strigose-ciliate leaf margin, and glandular upper leaf surface.


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