Malacothrix californica

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 192. 1838

Common names: California desertdandelion
Treatment appears in FNA Volume 19. Treatment on page 313. Mentioned on page 310, 311.
Annuals, 4–45 cm. Stems 1 (scapiform), erect or arcuate-ascending, mostly glabrous (shaggily piloso-hirsute proximally and at bases of heads). Cauline leaves: proximal oblanceolate to linear, pinnately lobed (lobes usually linear to filiform, sometimes broader), not fleshy, ultimate margins entire or dentate, faces usually shaggily piloso-hirsute (at least proximally), glabrescent; distal usually 0. Calyculi of 12–20, lanceolate to linear bractlets, hyaline margins 0.05–0.2 mm, abaxial faces shaggily piloso-hirsute to arachnose. Involucres (8–)10–15 × 5–6 mm. Phyllaries usually 20–26+ in 2-3+ series, (midstripes often reddish) lanceolate to lance-linear or subulate, unequal, hyaline margins 0.1–0.5 mm wide, abaxial faces (of outermost, at least) shaggily piloso-hirsute to arachnose (at least proximally). Receptacles sparsely bristly or glabrous. Florets 40–250; corollas usually yellow to pale yellow (often with abaxial reddish stripes), sometimes white, 16–20 mm; outer ligules exserted 11–13 mm. Cypselae ± prismatic, 2–3.4 mm, ribs extending to apices, 5 more prominent than others; persistent pappi of 12–15+, irregular, lance-deltate teeth plus (1–)2 bristles. Pollen 70–100% 3-porate. 2n = 14.

Phenology: Flowering Apr–Jun.
Habitat: Open sandy soil in grasslands, oak woodlands, chaparral, or desert margins
Elevation: 0–1700 m

Distribution

V19-464-distribution-map.gif

Calif., Mexico (Baja California).

Discussion

Malacothrix californica grows in the San Joaquin Valley, central western California, southwestern California, and the Mojave Desert.

References

None.

Lower Taxa

No lower taxa listed.

AuthorW. S. Davis +
Authorityde Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
Common nameCalifornia desertdandelion +
DistributionCalif. + and Mexico (Baja California). +
Elevation0–1700 m +
HabitatOpen sandy soil in grasslands, oak woodlands, chaparral, or desert margins +
IllustratorYevonn Wilson-Ramsey +
PhenologyFlowering Apr–Jun. +
Publication titlein A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Publication year1838 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V19-20-21/V19 464.xml +
SynonymsUndefined tribe Lactuceae +
Taxon familyAsteraceae +
Taxon nameMalacothrix californica +
Taxon parentMalacothrix +
Taxon rankspecies +
VolumeVolume 19 +