Pentachaeta fragilis

Brandegee

Univ. Calif. Publ. Bot. 6: 170. 1915.

Common names: Fragile pentachaeta
Endemic
Synonyms: Chaetopappa fragilis (Brandegee) D. D. Keck
Treatment appears in FNA Volume 20. Treatment on page 48. Mentioned on page 47.

Plants 4–16 cm. Stems diffusely branched. Leaf-blades spatulate to linear-oblanceolate, 5–15 (–25) × 1–3 mm. Involucres campanulate. Phyllaries in 2 (–3) series, elliptic to obovate, glabrous. Ray-florets 7–12; corollas yellow, laminae ca. 5 mm. Disc-florets 10–23; corollas yellow, narrowly funnelform, not contracted at lobes, lobes 5. Pappi of (8–) 15–20 bristles, not dilated at base. 2n = 18.


Phenology: Flowering Mar–Jun.
Habitat: Grassy areas
Elevation: 50–2300 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Pentachaeta fragilis"
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 +
Brandegee +
decurrent +
compound +  and simple +
narrowly oblanceolate;linear or filiform +
rugulose +  and muricate +
Fragile pentachaeta +
not 2-lipped +  and actinomorphic +
subterete +  and slightly compressed +
fertile +  and bisexual +
fertile +  and bisexual +
50–2300 m +
pilose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grassy areas +
discoid +  and disciform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
campanulate +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
5 cm50 mm <br />0.05 m <br /> (?) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
spatulate;linear-oblanceolate +
cauline +  and basal +
triangular +
2-carpellate +
persistent +
not dilated +
Flowering Mar–Jun. +
elliptic +  and obovate +
Univ. Calif. Publ. Bot. +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
unequal +
erect +  and ascending +
sparsely villous +  and tomentose +
appendaged +  and truncate +
papillate +  and smooth +
Chaetopappa fragilis +
Pentachaeta fragilis +
Pentachaeta +
species +
clavate +  and linear-tubular +
2 cm20 mm <br />0.02 m <br /> (48 cm480 mm <br />0.48 m <br />) +