The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

hybrid mule's ears, mule-ears

sunflower mule-ears, white mule's ears, white-head wyethia

Habit Plants 25–40(–80) cm.
Basal leaves

blades (light green) lance-elliptic to elliptic-ovate, (10–)20–30+ cm, margins usually entire, sometimes denticulate, ± ciliolate, faces sparsely pilose to pilosulous (usually minutely gland-dotted or stipitate-glandular as well);

cauline leaves similar, smaller distally (petiolate or sessile).


± hemispheric, (12–)20–30(–40) mm diam.

Ray florets


laminae (cream to white) 25–45 mm.


36–48, subequal, herbaceous, margins villous-ciliate, faces glabrous or glabrate;

outer 18–25 mm (not surpassing discs).


borne singly.


9–11 mm, strigillose distally and on margins.

Wyethia ×cusickii

Wyethia helianthoides

Phenology Flowering May–Jul.
Habitat Meadows, other damp to wet sites, openings in pine forests
Elevation 40–2600 m (100–8500 ft)
from USDA
[BONAP county map]
from FNA
[WildflowerSearch map]
[BONAP county map]

Hybrids between Wyethia helianthoides and W. amplexicaulis are infrequent where the species are in contact; no introgression has been noted. The hybrids have been called Wyethia ×cusickii Piper; they usually bloom later than W. helianthoides and earlier than W. amplexicaulis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 21, p. 103.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Wyethia
Sibling taxa
W. amplexicaulis, W. angustifolia, W. arizonica, W. glabra, W. helenioides, W. helianthoides, W. longicaulis, W. mollis
W. amplexicaulis, W. angustifolia, W. arizonica, W. glabra, W. helenioides, W. longicaulis, W. mollis
Name authority Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 40, plate 5. (1834)
Web links 
see all taxa on an iNaturalist map