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

2. Senecio pseudoarnica Lessing, Linnaea. 6: 240. 1831.

多肉千里光 duo rou qian li guang

Arnica maritima Linnaeus, Sp. Pl. 2: 884. 1753; Senecio maritimus (Linnaeus) Koidzumi (1910), not Linnaeus f. (1782).

Herbs, perennial, with short, thick rhizomes. Stem solitary, erect or ascending, 35-70 cm tall, hollow, simple, sparsely arachnoid, puberulent. Radical and lower stem leaves soon withering; median stem leaves sessile, ovate-oblong, oblong, elliptic, or obovate-oblong, 12-20 × 4.5-5.5 cm, thickly papery, abaxially paler and sparsely arachnoid, adaxially glabrous, pinnately veined, with 10-14 arcuate lateral veins, base cuneate-attenuate and subamplexicaul, margin coarsely mucronulate-dentate, apex obtuse. Upper leaves smaller, basally more rounded. Capitula 3.5-4.5 cm in diam., 2-20 in lax terminal corymbs; peduncles 1.5-3.5 cm, thick, usually dilated at apex, sparsely arachnoid and pubescent, bracteolate; bracteoles linear or linear-filiform, 5-15 mm. Involucres broadly campanulate or subhemispheric, 10-15 × 12-17 mm, calyculate; bracts of calyculus 8, narrowly linear, ca. equaling phyllaries; phyllaries 20 or 21, oblong or narrowly oblong, 10-15 × ca. 3 mm, herbaceous, sparsely puberulent, margin broadly scarious, apically acuminate and ciliate. Ray florets 15-17(-24); corolla tube 5-6.5 mm; lamina yellow, elliptic-oblong, 13-15 × 3-5 mm, 9-veined, apically obtuse, 3-denticulate. Disk florets many; corolla yellow, ca. 8 mm, with ca. 4 mm tube and funnelform limb; lobes ovate-oblong, ca. 1.7 mm, apically acute, papillose. Anthers ca. 2.5 mm, basally shortly obtuse-auriculate; appendages ovate; antheropodia short, broad. Style branches ca. 1.5 mm. Achenes cylindric, 7-8 mm, glabrous. Pappus dirty white, fulvous tinged at base, ca. 8 mm. Fl. Aug-Sep. 2n = 40.

Seashores; sea level. Heilongjiang [N Japan, Russia (Far East); Aleutian archipelago, subarctic North America].


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