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. Flowering and fruiting mostly Feb-May. Desert flats, alluvial slopes, loose sandy to gravelly soils, openings among shrubs, often with extra moisture (dry drainages, roadsides), rarely outside deserts; 0-1500 m; Ariz., Calif., Nev.; Mexico (Baja California, Sonora). 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).

Plant: Annual, grayish, cobwebby to tomentose; stems generally several from base, ± spreading, forked, < 11 cm, grayish to whitish, tomentose; central axis not dominant Leaves: < 11 mm, simple, elliptic to obovate, obtuse, rarely acute, flexible, grayish to whitish, tomentose; uppermost ± equaling heads INFLORESCENCE: primary inflorescence a head, each resembling a flower; heads disciform, in loose, ± hemispheric groups of 2-5, not restricted to forks and tips of branches; longest 3-4 mm, ± 2-2.5 mm wide, grayish to whitish, largest groups 5-9 mm diam; chaff scales in spiral ranks, longest 2.1-3.1 mm, body (except central vein) of outer scales soft, membranous Flowers: Pistillate flowers in 4-7 series; inner 4-20 flowers not subtended by chaff scales; corollas tubular; Disk flowers 3-5, bisexual, not subtended by chaff scales; corollas 1.3-2 mm, lobes 5, generally brownish to yellowish Fruit: Fruit: achenes, outer fruit erect, 0.7-0.9 mm, straight, compressed side-to-side; inner fruit smooth (rarely sparsely papillate), dull; pappus bristles 11-15, 1.3-2.4 mm, falling singly or in 2's Misc: Sandy washes or open alluvium; 0-1500 m.; Feb-May