Iva axillaris

Pursh

Fl. Amer. Sept. 2: 743. 1813.

IllustratedEndemic
Synonyms: Iva axillaris var. robustior Hooker
Treatment appears in FNA Volume 21. Treatment on page 26.

Perennials, 10–40 (–60) cm (rhizomatous). Stems erect (usually herbaceous). Leaves: petioles 0–3 mm; blades narrowly ovate or obovate to elliptic or spatulate, 15–25 (–45) × 3–8 (–15) mm, margins rarely toothed, faces usually ± strigose to scabrellous, glanddotted. Heads in ± racemiform arrays. Peduncles 1–2 mm. Involucres ± hemispheric, 2–3 mm. Phyllaries: outer 3–5 ± connate, ± herbaceous. Paleae linear, 1.5–2 mm. Pistillate florets 3–5 (–8); corollas 0.5–1.5 mm. Functionally staminate florets 4–8 (–20+); corollas 2–2.5 mm. Cypselae 2.5–3 mm. 2n = 36, 54.


Phenology: Flowering May–Oct.
Habitat: Seasonally wet, saline habitats
Elevation: 10–2500 m

Distribution

V21-45-distribution-map.gif

Alta., B.C., Man., Sask., Ariz., Calif., Colo., Idaho, Kans., Minn., Mont., Nebr., Nev., N.Mex., N.Dak., Okla., Oreg., S.Dak., Tex., Utah., Wash., Wis., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Iva axillaris"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
decurrent +
compound +  and simple +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
obovate;elliptic or spatulate +
3mm;8mm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
whitish +  and pinkish +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
scabrellous +
obcompressed +, plumply obovoid +  and pyriform +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Kans. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Okla. +, Oreg. +, S.Dak. +, Tex. +, Utah. +, Wash. +, Wis. +  and Wyo. +
10–2500 m +
scabrellous +
staminate +  and pistillate +
winged +  and beaked +
dispersed +
Seasonally wet, saline habitats +
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 +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
conspicuous +
sessile +  and petiolate +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
spatulate;linear or setiform +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
persistent +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering May–Oct. +
connate +  and distinct +
3 +  and 15 +
unequal +  and subequal +
Fl. Amer. Sept. +
bearing subulate enations +, hairy +  and bristly +
convex;hemispheric +
exalbuminous +
Illustrated +  and Endemic +
decumbent +  and sprawling +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Iva axillaris var. robustior +
Iva axillaris +
species +
campanulate +  and cylindric +
toothed +  and entire +
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
shrub +  and subshrub +