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, 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"
James D. Morefield +
(A. Gray) Holub +
Filago depressa +
Dwarf cottonrose +, spreading cottonrose +  and hierba limpia +
Ariz. +, Calif. +, Nev. +, Mexico (Baja California +  and Sonora). +
0–1500 m +
Desert flats, alluvial slopes, loose sandy to gravelly soils, openings among shrubs, often with extra moisture (dry drainages, roadsides), rarely outside deserts +
Flowering and fruiting mostly Feb–May. +
Oglifa depressa +
Logfia depressa +
species +