Iva axillaris
deep-root, poverty weed
narrowly ovate to elliptic or spatulate, 10–50 × 3–15 mm;
margins entire, rarely toothed;
surfaces sericeous to scabrid.
2–3 mm.
4–10(20);
corollas 2–2.5 mm, equaling or slightly exceeding involucres, yellow.
3–8;
corollas 1–1.5 mm, exserted.
2.5–3 mm; blackish, minutely gland-dotted.
unisexual; solitary in leaf axils;
peduncles 0.5–3(6) mm.
=36, 54.
Iva axillaris
Pine woods, shrublands, riverbanks, lake shores, ponds, roadsides, disturbed areas. Flowering May–Sep. 0–1900 m. BR, BW, Casc, Col, ECas, Lava, Owy, WV. CA, ID, NV, WA; north to British Columbia, northeast to Manitoba, east to WI, southeast to TX. Native.
This species is wind-pollinated, a somewhat unusual characteristic within Asteraceae.
Kenton Chambers
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
