Eupatorium mikanioides

Chapman

Fl. South. U.S., 195. 1860.

Common names: Semaphore thoroughwort
Endemic
Treatment appears in FNA Volume 21. Treatment on page 470. Mentioned on page 463.

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, glanddotted. 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, glanddotted. Florets 5; corollas 3.5–4 mm. Cypselae 1.2–1.5 mm; pappi of 20–35 bristles 3.5–4.5 mm. 2n = 20.


Phenology: Flowering Jul–Sep.
Habitat: Moist or wet, low, often saline places
Elevation: 0–10+ m

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Eupatorium mikanioides"
not tailed +, truncate +, rounded +  and obtuse +
acute;acuminate +
scarious +
usually ovate +  and lanceolate +
usually terete +  and clavate +
diffuse +  and dense +
indeterminate +  and determinate +
Kunsiri Chaw Siripun +  and Edward E. Schilling +
Chapman +
puberulent +
cuneate +
enlarged +
2.5 cm25 mm <br />0.025 m <br /> (8 cm80 mm <br />0.08 m <br />) +
dissected +, lobed +, toothed +  and entire +
deltate;rhombic +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
papillate +  and rugose +
(4-)5-angled;10-ribbed +
filiform +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Semaphore thoroughwort +
pinkish +  and white +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
prismatic +
fertile +  and bisexual +
0–10+ m +
glabrate +  and sparsely puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist or wet, low, often saline places +
in usually determinate , rarely indeterminate , arrays +  and singly +
indeterminate +
each +  and sessile +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
obconic;ellipsoid +
triangular +
2-carpellate +
persistent +
Flowering Jul–Sep. +
nerved +  and 2-3-nerved +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
8 +  and 12 +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Fl. South. U.S., +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
puberulent +
appendaged +  and truncate +
hirsutulous +
papillate +
Compositae +
Eupatorium mikanioides +
Eupatorium +
species +
campanulate +
toothed +  and entire +
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +
vine +, shrub +  and subshrub +