Encelia actoni

Elmer

Bot. Gaz. 39: 47. 1905.

Synonyms: Encelia frutescens var. actoni (Elmer) S. F. Blake Encelia virginensis subsp. actoni (Elmer) D. D. Keck
Treatment appears in FNA Volume 21. Treatment on page 121. Mentioned on page 119.

Shrubs, 50–150 cm. Stems with slender branches from bases, hairy, developing fissured barks. Leaves cauline; petioles 6–12 mm; blades silvery green, ovate to deltate, 25–40 mm, apices acute, faces ± silvery-canescent. Heads borne singly. Peduncles canescent. Involucres 8–14 mm. Phyllaries ovate. Ray-florets 14–25; corolla laminae 10–25 mm. Disc corollas yellow, 5–6 mm. Cypselae 5–7 mm; pappi usually 0, rarely of 1–2 bristlelike awns. 2n = 36.


Phenology: Flowering Feb–Jul.
Habitat: Open areas, rocky slopes, roadsides
Elevation: 800–1500 m

Distribution

V21-295-distribution-map.gif

Calif., Nev., Mexico (Baja California)

Discussion

The epithet actoni (sometimes spelled actonii) is from a place name (Acton, Los Angeles County, California); actoni is correct.

Selected References

None.

Lower Taxa

None.

"broader" is not a number.

... more about "Encelia actoni"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +, corymbiform +  and cymiform +
indeterminate +  and determinate +
Curtis Clark +
bristlelike +
1 +  and 2 +
coroniform +
fissured +
cuneate +
compound +  and simple +
silvery green +
ovate;deltate +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
brown-purple +  and yellow +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
hairy +  and glabrous +
obovate +  and cuneate +
fertile +  and bisexual +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
fertile +  and bisexual +
Calif. +, Nev. +  and Mexico (Baja California) +
800–1500 m +
silvery-canescent +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open areas, rocky slopes, roadsides +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
hemispheric +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
triangular +
2-carpellate +
persistent +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering Feb–Jul. +
18 +  and 30 +
unequal +  and subequal +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Encelia frutescens var. actoni +  and Encelia virginensis subsp. actoni +
Encelia actoni +
species +
expanded +
cylindric +
shorter to longer than campanulate +
toothed +  and entire +