Malacothrix squalida

Greene

Bull. Calif. Acad. Sci. 2: 152. 1886.

Common names: Island or Santa Cruz desertdandelion
EndemicConservation concern
Synonyms: Malacothrix foliosa var. squalida (Greene) E. W. Williams Malacothrix insularis var. squalida (Greene) Ferris
Treatment appears in FNA Volume 19. Treatment on page 321. Mentioned on page 311.

Annuals, 4–30 cm. Stems 1–3+, ascending to erect (stout), branched from bases and distally, ± leafy, glabrous. Cauline leaves: proximal obovate to oblanceolate, pinnately lobed (lobes 2–6 pairs), not fleshy, ultimate margins entire or dentate, faces glabrous; distal not notably reduced (narrowly ovate with 5–10 narrow teeth or lobes). Calyculi 0. Involucres narrowly to broadly campanulate, 9–12 × 4–10 mm. Phyllaries 31–49 in 5–6+ series (midstripes green or reddish), broadly ovate (outermost) to lance-oblong or lance-linear, unequal, hyaline margins 0.6–1 mm wide, faces glabrous. Receptacles usually not bristly. Florets 39–133; corollas light yellow, 12–19 mm; outer ligules exserted 6–11 mm. Cypselae ± prismatic or columnar, 1.3–2.1 mm, ribs extending to (and just beyond) apices, 5 more prominent than others; pappi persistent, of 15–20, irregular, ± deltate teeth (often hidden by apices of cypselae) plus 0 (–1) bristles. Pollen 70–100% 4-porate. 2n = 28.


Phenology: Flowering Mar–Jun.
Habitat: Open areas between shrubs, on ridges, knife-edges
Elevation: 0–30 m

Discussion

Of conservation concern.

Malacothrix squalida is known only from Middle Anacapa and Santa Cruz islands.

Selected References

None.

Lower Taxa

None.

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

... more about "Malacothrix squalida"
obtuse;acute or acuminate +
scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
W. S. Davis +
Greene +
decurrent +
compound +  and simple +
lanceolate;obovate oblanceolate or spatulate +
tuberculate +, rugose +, muricate +  and smooth +
less deltate or lanceolate;linear or subulate +
subequal +  and unequal +
filiform +
Island or Santa Cruz desertdandelion +
zygomorphic +, actinomorphic +  and (3-)5-merous +
light yellow +
1.2 cm12 mm <br />0.012 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
crenate +
stramineous +  and brown or purplish brown +
columnar +  and prismatic +
0–30 m +
winged +  and beaked +
dispersed +
Open areas between shrubs, on ridges, knife-edges +
indeterminate +
each +  and sessile +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cauline +  and basal +
divided +, lobed +  and dentate +
0.6mm +  and 1mm +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
2-carpellate +
persistent +
Flowering Mar–Jun. +
connate +  and distinct +
31 +  and 49 +
Bull. Calif. Acad. Sci. +
flat;more or less convex +
more prominent +
crenate +
exalbuminous +
Endemic +  and Conservation concern +
leafy +  and branched +
ascending +  and erect +
1 +  and 3 +
appendaged +  and truncate +
papillate +
Malacothrix foliosa var. squalida +  and Malacothrix insularis var. squalida +
Malacothrix squalida +
Malacothrix +
species +
deltate +
70 cm700 mm <br />0.7 m <br /> (200 cm2,000 mm <br />2 m <br />) +
4 cm40 mm <br />0.04 m <br /> (30 cm300 mm <br />0.3 m <br />) +
shrub +  and subshrub +