Malacothrix foliosa subsp. philbrickii

W. S. Davis

Madroño 44: 236. 1997.

Common names: Philbrick’s desertdandelion
Treatment appears in FNA Volume 19. Treatment on page 316. Mentioned on page 315.
Revision as of 19:20, 29 July 2020 by imported>Volume Importer
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Stems (1–) 3–5 (–10), erect (when single) or decumbent to ascending, branched proximally and/or distally. Distal cauline leaves oblanceolate to lanceolate usually pinnately lobed (from bases to near apices). Calyculi of 5–12+, oblong to linear bractlets (sometimes ± intergrading with phyllaries). Involucres 6–9 (–11) × 2.5–5 (–7) mm. Phyllaries 12–21+ in 2–3 series. Corollas medium yellow, 8–16 mm; outer ligules exserted 4–8 mm. Cypselae ± prismatic (5-angled), 1.3–1.7 mm, 5 ribs more prominent than others. 2n = 14.


Phenology: Flowering Mar–Jul.
Habitat: Open sandy areas, dunes, or between shrubs in island chaparral
Elevation: 0–100 m

Discussion

Of conservation concern.

Subspecies philbrickii is known only from Santa Barbara Island.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."]" is not declared as a valid unit of measurement for this property.

obtuse;acute or acuminate +
scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
W. S. Davis +
W. S. Davis +
decurrent +
compound +  and simple +
lanceolate;obovate oblanceolate or spatulate +
tuberculate +, rugose +, muricate +  and smooth +
oblong;linear +
subequal +  and unequal +
filiform +
Philbrick’s desertdandelion +
zygomorphic +, actinomorphic +  and (3-)5-merous +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
crenate +
stramineous +  and brown or purplish brown +
prismatic +
lobed +, oblanceolate +  and lanceolate +
0–100 m +
winged +  and beaked +
dispersed +
Open sandy areas, dunes, or between shrubs in island chaparral +
indeterminate +
each +  and sessile +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
campanulate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cauline +  and basal +
divided +, lobed +  and dentate +
0.05mm +  and 0.2mm +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2-carpellate +
persistent +
Flowering Mar–Jul. +
connate +  and distinct +
12 +  and 21 +
subequal +  and unequal +
flat;more or less convex +
more prominent +
crenate +
exalbuminous +
5 (?) +  and 10 (?) +
decumbent +  and ascending +
arachnose +  and glabrous +
3 +  and 5 +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Malacothrix foliosa subsp. philbrickii +
Malacothrix foliosa +
subspecies +
70 cm700 mm <br />0.7 m <br /> (200 cm2,000 mm <br />2 m <br />) +
4 cm40 mm <br />0.04 m <br /> (45 cm450 mm <br />0.45 m <br />) +
shrub +  and subshrub +