Tanacetum bipinnatum |
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dune tansy |
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Habit | Plants 1.5–5+ dm. |
Leaves | oblanceolate or elliptic in outline, 3–35 × 2–10 cm; margins often curled, 2–3-times pinnately lobed; surfaces villous to woolly, sometimes glabrous; primary lobes in 6–24 pairs; secondary lobes linear to ovate or obovate. |
Involucres | 4–5 × 8–22+ mm. |
Ray florets | 0–25; rays 1–6 mm, yellow. |
Disc florets | corollas 2–2.5 mm, yellow. |
Phyllaries | with membranous margins; inner not membranetipped. |
Fruits | 2–3 mm, tan; gland-dotted, 3–5-ribbed, pappi of low crowns or a ring of scales. |
Heads | 2–20+; peduncles 0.3–12 cm, villous. |
2n | =54. |
Tanacetum bipinnatum |
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Distribution | |
Discussion | Dunes, sandy flats, bluffs, grassy slopes. Flowering May–Aug. 0–100 m. Est. CA, WA; north to AK, northeast to Newfoundland; Asia, Europe. Native. Formerly treated as T. camphoratum, this taxon, as well as the related T. huronense, has been combined into T. bipinnatum. |
Source | Flora of Oregon, volume 2, page 360 Kenton Chambers |
Sibling taxa | |
Synonyms | Tanacetum camphoratum, Tanacetum douglasii |
Web links |
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