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Sonora False Goldenaster

Heterotheca marginata J. C. Semple

Comments

provided by eFloras
Heterotheca marginata grows in the Superstition and Pinal mountains. It is characterized by its numerous, long, hispido-strigose hairs along the entire margins of its distal leaves and peduncle bracts. The hairs give the plants a light gray-green appearance from a distance. The leaves are stiff, unlike other taxa in the section. It is similar to H. fulcrata var. arizonica, which is more glandular and typically has narrowly ovate to lanceolate bracts subtending smaller heads, and H. fulcrata var. senilis, which can be similar in indument but typically has more ovate leaves and heads subtended by narrowly ovate to lanceolate bracts.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 231, 233, 244, 245 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Description

provided by eFloras
Perennials, 38–80 cm, herbage abundantly long-hirsute; taprooted. Stems 1–40, ascending to erect (sometimes reddish brown proximally, brittle), sometimes arching, hispido-scabrous (axillary leaf fascicles often present). Leaves: cauline stiff; proximal petiolate, blades oblanceolate, (180–)240–550 × 4–7(–9) mm, bases convex-cuneate, margins entire, strigoso-ciliate, with many long-hispido-strigose cilia all along, apices acute, mucronate, faces sparsely to moderately, coarsely hispido-scabrous, sparsely stipitate-glandular; distal sessile, blades oblanceolate, 14–31 × 3.3–5.2 mm, reduced distally, apices acute. Heads 8–50(–78), in open paniculiform arrays. Peduncles 12–29 mm, moderately to densely hispido-strigose, sparsely stipitate-glandular; bracts 0–3, linear-oblanceolate, usually greatly reduced, rarely leaflike and linear-oblanceolate, sparsely to moderately hispido-scabrous, sparsely stipitate-glandular. Involucres campanulate, 6.5–9(–10) mm. Phyllaries in 4–5 series, narrowly triangular-lanceolate, unequal (outer lengths 1 / 5 – 1 / 4 inner), scarious, faces moderately strigose (larger hairs to 1 mm), eglandular to sparsely stipitate-glandular. Ray florets 10–15; laminae 9–14.5 × 1-2.5 mm. Disc florets (25–)31–46(–50); corollas barely ampliate, 4.5–7.5 mm, tubes and throats glabrate, lobes 0.4–0.9 mm, glabrous or glabrate (hairs 0.1–0.2–0.3 mm). Cypselae monomorphic, obconic, compressed, 1.5–3.2 mm, ribs 8–10 (sometimes brownish), faces moderately strigose; pappi off-white, outer of linear scales 0.5–1 mm, inner of 35–45 bristle 4.6–7.4 mm, longest acute to weakly clavate. 2n = 18, 36.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 231, 233, 244, 245 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Heterotheca marginata

provided by wikipedia EN

Heterotheca marginata, the Sonora false goldenaster,[1] is a rare North American species of flowering plant in the family Asteraceae. It grows in Arizona in the southwestern United States. It has been found in only three counties in the south-central part of the state: Maricopa, Pinal, and Gila.[2][3][4][5]

References

  1. ^ USDA, NRCS (n.d.). "Heterotheca marginata". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 22 July 2015.
  2. ^ Biota of North America Program 2014 county distribution map
  3. ^ SEINet, Southwestern Biodiversity, Arizona chapter photos, distribution map, description
  4. ^ University of Waterloo (Canada), Astereae Lab, Heterotheca marginata photos, drawings, distribution map
  5. ^ Flora of North America, Heterotheca marginata Semple, 1996.

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Heterotheca marginata: Brief Summary

provided by wikipedia EN

Heterotheca marginata, the Sonora false goldenaster, is a rare North American species of flowering plant in the family Asteraceae. It grows in Arizona in the southwestern United States. It has been found in only three counties in the south-central part of the state: Maricopa, Pinal, and Gila.

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