Eupatorium mikanioides
Chapm.
Family:
Asteraceae
Semaphore Thoroughwort
FNA
Resources
Kunsiri Chaw Siripun, Edward E. Schilling in Flora of North America (vol. 21)
Perennials,
50-100+ cm.
Stems
(from short rhizomes, green) single, branched distally, puberulent throughout.
Leaves
opposite (± vertical); petiolate (petioles 10-30 mm); blades ± 3-nerved distal to bases, deltate to rhombic, 25-80 × 20-60 mm, bases broadly cuneate, margins usually serrate (teeth uneven), sometimes crenate, apices acute, faces glabrate to sparsely puberulent, gland-dotted.
Heads
in corymbiform arrays.
Phyllaries
8-12 in 2-3 series, elliptic to oblong, 1.5-5 × 0.8-1 mm, apices acute to acuminate, abaxial faces puberulent, gland-dotted.
Florets
5; corollas 3.5-4 mm.
Cypselae
1.2-1.5 mm;
pappi
of 20-35 bristles 3.5-4.5 mm.
2
n
= 20.
Flowering Jul-Sep. Moist or wet, low, often saline places; 0-10+ m; Fla.
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