Logfia depressa

(A. Gray) Holub

Preslia 70: 107. 1998.

Common names: Dwarf cottonrose spreading cottonrose hierba limpia
Basionym: Filago depressa A. Gray Proc. Amer. Acad. Arts 19: 3. 1883
Synonyms: Oglifa depressa (A. Gray) Chrtek & Holub
Treatment appears in FNA Volume 19. Treatment on page 446. Mentioned on page 443, 444, 450, 452.

Plants 1–5 (–10) cm. Stems (1–) 3–10+, typically ± prostrate; branches ± leafy between proximal forks, remaining grayish to whitish, lanuginose. Leaves elliptic to obovate, largest 6–8 (–10) × 1–2 mm, pliant; longest capitular leaves mostly 0.8–1.5 times head heights, obtuse. Heads in glomerules of 2–5 in ± dichasiiform arrays, ± pyriform, largest 3–4 × 2–2.5 mm. Phyllaries 0, vestigial, or 1–4, unequal, ± like paleae. Receptacles obovoid, 0.9–1.2 mm, heights 1.4–1.6 times diams. Pistillate paleae (except innermost) 7–13 in 2 (–3) series, spirally ranked, loosely saccate, incurved 20–60°, somewhat gibbous, not galeate, longest 2.1–3.1 mm, distal 20–50% of lengths glabrous abaxially; bodies (except midnerves) chartaceous, ± terete; wings prominent. Innermost paleae ± 5, spreading in 1 series, pistillate. Pistillate florets: outer 7–13 epappose, inner (4–) 10–21 pappose. Bisexual florets 2–5; corollas 1.3–2 mm, lobes mostly 5, yellowish to brownish. Cypselae: outer nearly straight, ± erect, compressed, 0.7–0.9 mm; inner mostly smooth; pappi of (11–) 13–15 bristles falling in 1s or 2s, 1.3–2.4 mm.


Phenology: Flowering and fruiting mostly Feb–May.
Habitat: Desert flats, alluvial slopes, loose sandy to gravelly soils, openings among shrubs, often with extra moisture (dry drainages, roadsides), rarely outside deserts
Elevation: 0–1500 m

Distribution

V19-737-distribution-map.gif

Ariz., Calif., Nev., Mexico (Baja California), Mexico (Sonora)

Discussion

Reported to be eaten by desert tortoises (Gopherus agassizii), Logfia depressa is known from the Mojave Desert and most of the Sonoran Desert (except islands and lower Colorado River valley) including arid Baja California; isolated collections are known from southwestern California and Carson City, Nevada (where recently extirpated).

Selected References

None.

Lower Taxa

None.
... more about "Logfia depressa"
truncate-penicillate;truncate +
scarious +
mostly ovate +  and lanceovate or linear +
racemiform +  and paniculiform or dichasiiform +
indeterminate +  and determinate +
James D. Morefield +
(A. Gray) Holub +
decurrent +
Filago depressa +
compound +  and simple +
subulate;obovate +
muriculate +, papillate +  and smooth +
grayish +  and whitish +
Dwarf cottonrose +, spreading cottonrose +  and hierba limpia +
actinomorphic +
red-tipped +, purplish +, yellow +  and whitish +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
attenuate +, not beaked +, obcompressed +, compressed +, mostly ovoid +  and obovoid +
Ariz. +, Calif. +, Nev. +, Mexico (Baja California) +  and Mexico (Sonora) +
0–1500 m +
dull +  and shiny +
usually papillate +  and muriculate +
winged +  and beaked +
dispersed +
Desert flats, alluvial slopes, loose sandy to gravelly soils, openings among shrubs, often with extra moisture (dry drainages, roadsides), rarely outside deserts +
indeterminate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
homogamous +  and heterogamous +
pyriform +
largest +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
each +  and sessile +
inconspicuous +
sessile +  and petiolate +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
elliptic;obovate +
largest +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
yellowish;brownish +
rarely lanceovate +  and lanceolate +
0.8-1.5 times head heights +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
2-carpellate +
not galeate;gibbous +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
persistent +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Flowering and fruiting mostly Feb–May. +
paleate +  and epaleate +
1.4-1.6 times diams +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
exalbuminous +
1 (?) +  and 3 (?) +
ascending +  and prostrate +
3 +  and 10 +
appendaged +  and truncate +
papillate +
Oglifa depressa +
Logfia depressa +
species +
50 cm500 mm <br />0.5 m <br /> (70 cm700 mm <br />0.7 m <br />) +
1 cm10 mm <br />0.01 m <br /> (50 cm500 mm <br />0.5 m <br />) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
erect;incurved +