Psilostrophe sparsiflora (A. Gray) A. Nels.
Family: Asteraceae
greenstem paperflower
[Riddellia tagetina var. sparsiflora A. Gray]
Psilostrophe sparsiflora image
Max Licher  
Biennials or perennials (rarely flowering first year), 10-40+ cm. Stems ± strigillose (greenish, sometimes ± villous in proximal axils). Heads in ± corymbiform arrays. Peduncles 8-12(-25+) mm. Involucres 4-6 mm. Ray florets (1-)2-3(-4); corolla laminae (6-)8-10+ mm, reflexed in fruit. Disc florets 7-9. Cypselae usually glabrous, sometimes gland-dotted; pap-pi of 4-5 lanceolate to lance-subulate scales 2-3 mm. 2n = 32. Flowering May-Sep. Grasslands, pinyon-juniper scrub, sagebrush scrub, yellow pine forests; 900-2200 m; Ariz., N.Mex., Utah.
FNA 2006, Martin and Hutchins 1980, Heil et al. 2013, Allred and Ivey 2012, MacDougall 1973
Duration: Perennial Nativity: Native Lifeform: Subshrub General: Perennial herbs to subshrubs, 10-40 cm tall, from a woody, often branched caudex, the crown of the caudex usually wooly; stems single or clustered at the base, freely branching above, inconspicuously hairy above the base, often zig-zagging or appearing twisted at the nodes. Leaves: Basal leaves petiolate, withering with age; stem leaves alternate, sessile; basal blades linear to spatulate with entire or occasionally lobed margins, to 10 cm long and 15 mm wide, loosely villous; stem leaves similar but reduced in size, linear to narrowly oblanceolate, less hairy. Flowers: Flower heads yellow, radiate, and showy, arranged in groups of 3-6 in loose panicles on peduncles 1 cm long; involucres cylindric to campanulate, 4-6 mm high, loosely woolly, the bracts (phyllaries) in 1-2 subequal series; ray florets 1-4 per flower head, the laminae (ray petals) 1 cm long, yellow, reflexed in fruit, wider than long and shallowly 3-lobed; disc florets 7-9 per flower head, yellow. Fruits: Achenes linear, usually glabrous, sometimes gland-dotted; topped with a pappus of unequal linear-lanceolate scales, these half as long as disc corollas. Ecology: Found on dry slopes and open woods, often in grasslands and into the pinyon-juniper and higher elevation woodlands from 3,000-7,500 ft (914-2286 m); flowers May-September. Distribution: UT, AZ, and NM Ethnobotany: Known to be toxic, it has also been used ceremonially and medicinally, as an antidiarrheal, a blood purifier, and a poultice for wounds. Synonyms: Riddellia tagetina var. sparsiflora Editor: SBuckley 2010, AHazelton 2017 Etymology: Psilostrophe is from Greek psilos, naked or bare, and trophos, a nurturer or nurse, alluding to the naked, epaleate receptacle (the "nurse"); while sparsiflora means few-flowered.
Psilostrophe sparsiflora image
Max Licher  
Psilostrophe sparsiflora image
Max Licher  
Psilostrophe sparsiflora image
Max Licher  
Psilostrophe sparsiflora image
Max Licher  
Psilostrophe sparsiflora image
Max Licher  
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Kirstin Phillips  
Psilostrophe sparsiflora image
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Psilostrophe sparsiflora image
Kirstin Phillips  
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Kirstin Phillips  
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Kirstin Phillips  
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Kirstin Phillips  
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
Psilostrophe sparsiflora image
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