Conoclinium betonicifolium

(Miller) R. M. King & H. Robinson

Phytologia 19: 300. 1970.

Common names: Betony-leaf mistflower
Basionym: Eupatorium betonicifolium Miller Gard. Dict. ed. 8, Eupatorium no. 9. 1768
Treatment appears in FNA Volume 21. Treatment on page 479.
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Stems decumbent or procumbent (rooting at nodes). Leaf blades usually oblong to oblong-lanceolate or oblanceolate to ovate, sometimes triangular, 2.5–5(–11) cm, bases cordate, obtuse, or truncate (often subauriculate), margins usually crenate to dentate, rarely entire, apices rounded to obtuse. Phyllaries ca. 4 mm. Corollas blue to purple, 2.5–3 mm. Cypselae 1.2–1.8 mm, glabrous; pappi: bristle tips dilated.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Leaf blades mostly oblong to oblong-lanceolate, bases cordate to truncate (often subauriculate), margins crenate; coastal habitats Conoclinium betonicifolium var. betonicifolium
1 Leaf blades mostly oblanceolate to ovate, bases cordate, obtuse, or truncate, margins crenate or entire; inland habitats along streams and around lakes Conoclinium betonicifolium var. integrifolium