Arnica lanceolata Nutt.
Family: Asteraceae
Lance-Leaf Leopardbane
Arnica lanceolata image

Plants (5-)20-80 cm. Stems solitary to densely clumped, simple or branched among heads. Leaves 4-8(-10) pairs, mostly cauline; usually sessile (sometimes with partly connate-sheathing bases), sometimes petiolate (proximalmost); blades lance-elliptic, lanceolate, oblanceolate, obovate, or ovate, 4-12(-20) × (1-)2-6(-8) cm, margins subentire to dentate-serrate, apices usually acute, rarely obtuse, faces glabrate to pilose. Heads (1-)3-10(-20). Involucres narrowly campanulate to turbinate. Phyllaries 8-15(-19), narrowly to broadly lanceolate. Ray florets (5-)7-17(-20); corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae brown, 4-8 mm, sparsely hirsutulous, stipitate-glandular; pappi tawny, bristles subplumose.

Stems mostly solitary, 2-5 dm from a long, nearly naked rhizome, spreading-villous and often glandular above, mostly glabrous below; lvs sparsely long-hairy or subglabrous, dentate or denticulate, the lower ones evidently petiolate, elliptic or oblanceolate, to 20 cm (petiole included) נ4 cm, the upper sessile and often more lance-ovate or lance-oblong, the stem appearing leafy; heads 1-3, campanulate, the disk 1.5-2 cm wide; invol 10-13 mm, spreading villous and stipitate- glandular, the bracts more strongly acuminate than in no. 1 [Arnica lonchophylla Greene]; rays 10-15, 1.5-2 cm; pappus-bristles tawny, subplumose; 2n=76 (apomictic tetraploid). Streambanks and other moist, protected places especially in acid soils; mts. of n. N.Y., N.H., and Me. to N.B. and the Gasp顰enins. of Que. July, Aug. (A. mollis, misapplied)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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Arnica lanceolata image
Arnica lanceolata image
Charles Webber  
Arnica lanceolata image
Charles Webber  
Arnica lanceolata image
Keir Morse  
Arnica lanceolata image
Keir Morse  
Arnica lanceolata image
Keir Morse  
Arnica lanceolata image
Keir Morse  
Arnica lanceolata image
Arnica lanceolata image
Charles Webber  
Arnica lanceolata image
Charles Webber  
Arnica lanceolata image
Keir Morse  
Arnica lanceolata image
Keir Morse  
Arnica lanceolata image
Keir Morse  
Arnica lanceolata image
Keir Morse