Arnica lanceolata

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 407. 1841

Endemic
Treatment appears in FNA Volume 21. Treatment on page 373. Mentioned on page 368.

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.

Distribution

V21-934-distribution-map.gif

Alta., B.C., N.B., N.W.T., Que., Yukon, Alaska, Calif., Idaho, Maine, Mont., N.H., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Subspecies 2 (2 in the flora).

Selected References

None.

Key

1 Cauline leaves mostly sessile (proximalmost pair petiolate); e North America Arnica lanceolata subsp. lanceolata
1 Cauline leaves sessile (including proximalmost pair, bases sometimes partly connate-sheathing); w North America Arnica lanceolata subsp. prima
... more about "Arnica lanceolata"
Steven J. Wolf +
Nuttall +
Alta. +, B.C. +, N.B. +, N.W.T. +, Que. +, Yukon +, Alaska +, Calif. +, Idaho +, Maine +, Mont. +, N.H. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
Trans. Amer. Philos. Soc., n. s. +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Arnica lanceolata +
species +