Chrysothamnus depressus Nutt.  
Family: Asteraceae
longflower rabbitbrush,  more...
[Ericameria depressa (Nutt.) L.C. Anders.]
Chrysothamnus depressus image
Max Licher  
Shrubs, 10-50 cm; woody, highly branched caudices, proximal branches decumbent, bark tan to gray, flaky with age. Stems green, becoming whitish tan, ± ridged from leaf bases, densely puberulent. Leaves erect or closely ascending; sessile; blades with evident midnerves, linear to oblanceolate or narrowly oblong, 7-30 × 1.5-7 mm, flat to keeled, apices acute (often apiculate), faces glabrous or puberulent, sometimes sparsely stipitate-glandular. Heads in densely cymiform arrays, not overtopped by distal leaves. Involucres obconic, 9-15 × 3-5 mm. Phyllaries 20-25 in 4-6 series, in 5 strong vertical ranks, tan, often with green and/or purplish markings, midnerves evident throughout and ± expanded apically, lanceolate to elliptic, 3-8 × 0.5-1.5 mm, unequal, outer often herbaceous, inner scarious, strongly keeled, apices acute to acuminate, flat, faces puberulent. Disc florets 5-6; corollas 7-11 mm, lobes 1-2.1 mm; style branches 2.4-3.3 mm, appendages 1.5-2 mm. Cypselae tan, subcylindric (tapering proximally), ± flattened, 5-6.5 mm, faces glabrous, sparsely glandular distally; pappi whitish tan, 5.5-7.5 mm. 2n = 18. Flowering late summer-fall. Dry canyons and rocky crevices; 1000-2700 m; Ariz., Calif., Colo., Nev., N.Mex., Utah.
Plant: Subshrub 1-2 dm; caudex much-branched; stems erect, unbranched below inflorescence, brittle, rough, ± gray-hairy Leaves: 2-3 cm, alternate, sessile, entire, oblanceolate, rough-hairy INFLORESCENCE: primary inflorescence a head, each resembling a flower; heads discoid, in small, dense cymes; involucre 10-15 mm, ± cylindric; phyllaries in well defined vertical ranks, strongly keeled, acute to acuminate, straw-colored or purplish Flowers: 5-6; corollas 8-11 mm, generally yellow, lobes 0.5-3 mm, generally spreading; style branches long, slender, generally exserted Fruit: 5-6.5 mm, narrowly cylindric, ± 5-ridged, light brown, generally glabrous (sparsely glandular); pappus ± = corolla Misc: Rocky crevices; 1000-2100 m.; Aug-Oct
Common Name: longflower rabbitbrush Duration: Perennial Nativity: Native Lifeform: Shrub General: Shrub, 10-50 cm (0.3-1.6 ft) tall; stems erect to ascending, greenish, becoming whitish tan with age, densely puberulent; branches rigid, the lower ones decumbent; twigs herbaceous, finely puberulent; caudex highly branched. Leaves: Cauline, alternate, simple, linear-oblanceolate, narrowly oblong or elliptic-oblong, mostly 0.7-2 cm long, 1-4 mm wide, erect to closely ascending, surfaces glabrous or puberulent, sometimes with stalked glands, margins entire, apex obtuse to acute, the upper cauline blades often tipped with a sharp point; blades sessile. Flowers: Heads numerous, clustered in dense cyme-like arrays at the branch apices; involucre obconic, 9-13 mm long; involucral bracts in 4-6 series, strongly aligned in 5 vertical ranks, strongly keeled, tan, often tinged greenish or purplish, apex acute to acuminate, usually awn-tipped; disk flowers only, 5-6, 7-9.5 mm long, yellow. Fruits: Achene, 5-7 mm long, 4-angled, slightly flattened, tan, glabrous and sparsely glandular towards the apex; pappus of numerous minutely barbed whitish tan bristles. Ecology: Found in dry, open habitats, rocky slopes, crevices, canyons from 5,000-9,000 ft (1524-2743 m), flowers July-October. Distribution: Apache, Coconino, Mohave, and Navajo counties; southwestern U.S. Notes: Chrysothamnus molestus (Arizona rabbitbrush) is smaller (8-20 cm tall), with leaves linear to narrowly elliptic, the surfaces moderately puberulent and bearing stalked glands, and the involucral bracts with acute to rounded tips. It typically occurs in pi-on-juniper communities, in rocky and limestone soils. Chrysothamnus viscidiflorus (yellow rabbitbrush) is distinguished by a taller growth form (10-120 cm tall), leaves ascending, spreading or deflexed, linear to filiform or lanceolate, and achenes moderately to densely pubescent. Five subspecies occur in Arizona; of these, ssp. lanceolatus, ssp. planifolius, ssp. puberulus, and ssp. viscidiflorus are reported as occurring in our elevational range. Ethnobotany: The Hopi use C. depressus for prayer stick decorations. The Navajo use it to facilitate childbirth and delivery of the placenta. Editor: Springer et al. 2011
Chrysothamnus depressus image
Max Licher  
Chrysothamnus depressus image
Max Licher  
Chrysothamnus depressus image
Max Licher  
Chrysothamnus depressus image
Max Licher  
Chrysothamnus depressus image
Max Licher  
Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image
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Kirstin Phillips  
Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image
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Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image
Kirstin Phillips  
Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image
Chrysothamnus depressus image