Pentachaeta aurea

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 336. 1840.

Common names: Golden-rayed pentachaeta
Illustrated
Synonyms: Chaetopappa aurea (Nuttall) D. D. Keck
Treatment appears in FNA Volume 20. Treatment on page 48. Mentioned on page 47.

Plants 5–36 cm. Stems branched. Leaf-blades linear, 10–35 (–55) × 1 (–3) mm. Involucres turbinate. Phyllaries in 4–5-series, ovate-elliptic to oblongelliptic, usually glabrous, rarely sparsely short-strigose. Ray-florets 14–52; corollas yellow to brownish orange, laminae 3–12 mm. Disc-florets 30–90; corollas yellow, narrowly funnelform, not contracted at lobes, lobes 5. Pappi of 5 (–8) bristles, prominently dilated at bases. 2n = 18.


Phenology: Flowering Apr–Jul.
Habitat: Grassy or shrubby areas
Elevation: 30–2000 m

Distribution

V20-68-distribution-map.gif

Calif., Mexico (nw Baja California)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Pentachaeta aurea"
sparsely +  and eglandular +
hirsuto-pilose +  and glabrous +
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Guy L. Nesom +
Nuttall +
decurrent +
compound +  and simple +
narrowly oblanceolate;linear or filiform +
rugulose +  and muricate +
Golden-rayed pentachaeta +
not 2-lipped +  and actinomorphic +
yellow +  and brownish orange +
subterete +  and slightly compressed +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Mexico (nw Baja California) +
30–2000 m +
pilose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grassy or shrubby areas +
discoid +  and disciform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
cauline +  and basal +
triangular +
2-carpellate +
persistent +
Flowering Apr–Jul. +
short-strigose +  and glabrous +
ovate-elliptic +  and oblongelliptic +
Trans. Amer. Philos. Soc., n. s. +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
unequal +
Illustrated +
erect +  and ascending +
sparsely villous +  and tomentose +
appendaged +  and truncate +
papillate +  and smooth +
Chaetopappa aurea +
Pentachaeta aurea +
Pentachaeta +
species +
clavate +  and linear-tubular +
2 cm20 mm <br />0.02 m <br /> (48 cm480 mm <br />0.48 m <br />) +