Hedosyne ambrosiifolia (Gray) Strother
Family: Asteraceae
ragged marsh-elder,  more...
[Cyclachaena lobata ,  more]
Hedosyne ambrosiifolia image
Patrick Alexander  
Leaves: petioles 5-12(-45) mm; blades 3-5(-9) × 4-5(-8) cm overall, lobes 1-3 mm wide. Peduncles 3-12+ mm. Involucres 2-3+ mm. Phyllaries: outer 5 sparsely strigose or glabrous. Paleae 1-1.5 mm. Functionally staminate florets: corollas 1.5-2 mm. Cypselae 1.4-1.7 mm. 2n = 36. Flowering Jul-Sep. Disturbed sites (roadsides, washes, etc.), in sandy, gypseous, or calcareous soils; 1000-2000 m; Ariz., N.Mex., Tex.; Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Sonora, Zacatecas).
FNA 2006, Martin and Hutchins 1980, Kearney and Peebles 1969
Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Annual with hispid stem, 10-50 cm tall; stems erect, strictly branched. Leaves: Cauline, mostly alternate, petioles 5-12 mm long, blades 3-5 cm long, 4-5 cm wide, deltate or ovate to lanceolate, 1-3 pinnately lobed, 1-3 mm wide, ultimate margins entire or toothed, faces hispid, usually gland-dotted. Flowers: Heads disciform, usually in loose panicles, with hemispheric involucres 4-6 mm wide, phyllaries persistent, 10-12 in 2 series, distinct, outer 5 sparsely strigose or glabrous, inner ones scarious to membranous; receptacles hemispheric, the paleae spatulate to linear, membranous, sparsely hairy or glabrate, usually gland dotted; many staminate flowers with whitish corollas, funnelform, 5 lobes, 5-10 pistillate marginal florets with obsolete corollas. Fruits: Cypselae pyriform, more or less obcompressed, finely striate, glabrous, becoming muricate in age. Ecology: Found in disturbed sites, on sandy or calcareous soils, to being among rocks; 3,000-5,500 ft (914-1676 m); flowers July-September. Distribution: se AZ, s NM, sw TX; south to c MEX. Notes: This species can be non-descript, resembling Ambrosia or Artemesia with small composite heads. Look for heads having both pistillate and staminate flowers, a loose inflorescence with drooping heads; especially distinctive are the pinnately-lobed leaves which do not resemble Ambrosia, and are especially intricately and symmetrically divided as basal rosettes. Ethnobotany: Unknown Etymology: Hedosyne comes from Greek, meaning delight, while ambrosiifolia means having leaves like Ambrosia. Synonyms: Iva ambrosiifolia, Iva ambrosiifolia subsp. lobata Editor: SBuckley 2010, FSCoburn 2014
Hedosyne ambrosiifolia image
Patrick Alexander  
Hedosyne ambrosiifolia image
Patrick Alexander  
Hedosyne ambrosiifolia image
Patrick Alexander  
Hedosyne ambrosiifolia image
Patrick Alexander  
Hedosyne ambrosiifolia image
Hedosyne ambrosiifolia image
Hedosyne ambrosiifolia image
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