Eupatorium leptophyllum
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 176. 1836.
Perennials, 50–200 cm. Stems (from short caudices) single, branched distally, glabrous throughout, glanddotted. Leaves opposite (proximal) or alternate (nodes often appearing leafy by development of leaves on lateral buds without axis elongation); petiolate or sessile; blades (usually pinnately or ternately lobed) or lobes 1-nerved or pinnately nerved, linear, 20–100 × 0.2–0.5 (–1) mm, bases slightly expanded, margins entire, apices rounded to acute, faces sparsely puberulent to glabrate, glanddotted. Heads in paniculiform arrays (branches supporting heads recurved, secund). Phyllaries 6–10 in 1–2 series, lanceolate, 1.5–3 × 0.5–0.7 mm, apices acuminate, mucronate, abaxial faces glabrous or glabrate (not glanddotted). Florets 5; corollas 2–2.5 mm. Cypselae 1–1.5 mm; pappi of 15–30 bristles 2–2.5 mm. 2n = 20.
Phenology: Flowering Aug–Oct.
Habitat: Pond margins, wet, low places, shallow water
Elevation: 10–50+ m
Distribution
Ala., Fla., Ga., Miss., N.C., S.C.
Discussion
Selected References
None.
Lower Taxa
"fine" is not a number.