Iva microcephala

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 346. 1840.

Endemic
Treatment appears in FNA Volume 21. Treatment on page 28. Mentioned on page 25.

Annuals, 10–70 (–100) cm. Stems erect. Leaves: petioles 0–1 mm; blades linear to filiform, 10–35 (–60) × 0.6–1.5 (–3) mm, margins entire, faces ± scabrellous, glanddotted. Heads in ± spiciform arrays. Peduncles 0.5–1 mm. Involucres hemispheric, 1.5–2 mm. Phyllaries: outer 5 distinct, ± herbaceous. Paleae cuneiform to setiform, 1–2 mm. Pistillate florets 2–3+; corollas 0.5–0.8 mm. Functionally staminate florets 3–5; corollas 1.8–2 mm. Cypselae 1–1.5 mm. 2n = 32.


Phenology: Flowering Sep–Nov.
Habitat: Disturbed sites, moist or wet soils
Elevation: 1–100 m

Distribution

V21-48-distribution-map.gif

Ala., Fla., Ga., N.C., S.C.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Iva microcephala"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
Nuttall +
decurrent +
compound +  and simple +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
linear;filiform +
0.6mm;1.5mm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
whitish +  and pinkish +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
scabrellous +
obcompressed +, plumply obovoid +  and pyriform +
fertile +  and bisexual +
Ala. +, Fla. +, Ga. +, N.C. +  and S.C. +
1–100 m +
scabrellous +
staminate +  and pistillate +
winged +  and beaked +
dispersed +
Disturbed sites, moist or wet soils +
disciform +  and discoid +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
scarious +  and membranous +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hemispheric +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
conspicuous +
sessile +  and petiolate +
deltate +
toothed +  and entire +
2-carpellate +
cuneiform;setiform +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
persistent +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering Sep–Nov. +
connate +  and distinct +
3 +  and 15 +
unequal +  and subequal +
Trans. Amer. Philos. Soc., n. s. +
bearing subulate enations +, hairy +  and bristly +
convex;hemispheric +
exalbuminous +
decumbent +  and sprawling +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Iva microcephala +
species +
campanulate +  and cylindric +
toothed +  and entire +
70 cm700 mm <br />0.7 m <br /> (100 cm1,000 mm <br />1 m <br />) +
10 cm100 mm <br />0.1 m <br /> (70 cm700 mm <br />0.7 m <br />) +
shrub +  and subshrub +