Ericameria nana

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 319. 1840.

Common names: Dwarf goldenbush
Endemic
Synonyms: Haplopappus nanus (Nuttall) D. C. Eaton
Treatment appears in FNA Volume 20. Treatment on page 61. Mentioned on page 53, 62.

Plants 5–50 cm. Stems erect to spreading or recurved, green when young, soon becoming tan to brown, then nearly black when older, highly branched, twigs glabrous, glandular, usually resinous. Leaves ascending to spreading; blades usually elliptic to oblanceolate, occasionally spatulate, 10–15 × 0.5–1.5 mm, mostly adaxially sulcate, margins entire, midnerves usually obscure to weakly evident, apices acute, apiculate, faces glandular, sometimes irregularly gland-dotted (in shallow pits), resinous; axillary fascicles present, persistent. Heads in congested, cymiform arrays (0.5–2.5 cm wide). Peduncles 0.2–5 mm (mostly ebracteate, glabrous). Involucres obconic, 5.5–7.5 × 2.5–4 mm. Phyllaries 22–30 in 4–5 series, mostly tan, lanceolate to elliptic, 2–6.5 × 0.5–1.2 mm, strongly unequal, outer sometimes herbaceous or herbaceous-tipped (body apices obtuse or truncate to retuse, appendages erect), midnerves not evident or slightly raised, slightly expanded subapically, (mostly margins narrowly membranous, entire) apices acute to acuminate or attenuate, mid often aristate to cuspidate, abaxial faces glabrous, resinous. Ray-florets 1–7; laminae elliptic, 3–4 × 0.8–1.3 mm. Disc-florets 4–8; corollas 4.5–6.5 mm. Cypselae tan, narrowly oblanceoloid, 4–5.5 mm, glabrous or densely sericeous; pappi tan, 4–5.5 mm. 2n = 18.


Phenology: Flowering summer–fall.
Habitat: Arid rocky plains, desert mountain cliffs, crevices
Elevation: 1300–2900 m

Distribution

V20-99-distribution-map.gif

Calif., Idaho, Mont., Nev., Oreg., Utah.

Discussion

Some populations of Ericameria nana exhibit extreme variation in leaf shape and in phyllary apex length and shape. Whether such variants represent distinct taxa remains to be tested.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Ericameria nana"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
Nuttall +
decurrent +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
spatulate;usually elliptic;oblanceolate +
0.5mm;1.5mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Dwarf goldenbush +
not 2-lipped +  and actinomorphic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
sericeous +  and glabrous +
oblanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +  and Utah. +
1300–2900 m +
resinous +
gland-dotted +
persistent +
glabrous or +  and sparsely densely hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Arid rocky plains, desert mountain cliffs, crevices +
thyrsiform +, paniculiform +, branched +, racemiform +, cymiform +, discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.8mm;1.3mm +
sessile +  and petiolate +
erect;spreading or reflexed +
deltate +  and triangular +
aristate +  and cuspidate +
raised +, not evident +, usually obscure +  and weakly evident +
2-carpellate +
persistent +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering summer–fall. +
0.2 cm2 mm <br />0.002 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
lanceolate +  and elliptic +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Trans. Amer. Philos. Soc., n. s. +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
resinous +
black +, tan +  and brown +
erect +  and spreading or recurved +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Haplopappus nanus +
Ericameria nana +
Ericameria +
species +
campanulate +
resinous +
perennial +, biennial +  and annual +