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White Rosinweed

Silphium albiflorum A. Gray

Description

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Plants scapiform, 20–75 cm; taprooted. Stems terete, glabrous, hirsute, hispid, or scabrous. Leaves: basal persistent, petiolate; cauline usually alternate, rarely subopposite, petiolate or sessile; blades deltate, elliptic, linear, ovate, or rhombic, 2–40 × 1.5–26 cm, sometimes (proximal) 1–2-pinnately lobed, bases attenuate, cuneate, or truncate, ultimate margins unevenly toothed or entire (distal blades), apices acuminate to apiculate, faces scabrous to hirsute. Phyllaries 23–36 in 2–3 series, outer reflexed, apices acuminate, abaxial faces hispid. Ray florets 14–30; corollas white. Disc florets 70–130; corollas white. Cypselae 12–26 × 7–12 mm; pappi 2–5 mm.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 77, 78 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Silphium albiflorum

provided by wikipedia EN

Silphium albiflorum, commonly known as white rosinweed,[1] is a species of flowering plant in the family Asteraceae. It is native to the United States, where it is endemic to the state of Texas.[2] Its natural habitat is in open, calcareous prairies.[3][4]

It is a tall perennial with rigid, deeply divided leaves. It produces heads of white flowers in late spring through mid-summer.[3] It is a slow growing, but extremely long-lived plant.[5]

Due to its narrow habitat requirements and low population recruitment, it is considered to be a highly conservative species. It fares poorly in areas of suburban development, and faces significant threats in parts of its range.[6]

References

  1. ^ USDA, NRCS (n.d.). "Silphium albiflorum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 29 January 2018.
  2. ^ "Silphium albiflorum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 29 January 2018.
  3. ^ a b Diggs, George; Lipscomb, Barney; O'Kennon, Robert (1999). Flora of North Central Texas. Botanical Research Institute of Texas. p. 404.
  4. ^ Silphium albiflorum Flora of North America
  5. ^ Silphium albiflorum Lady Bird Johnson Wildflower Center
  6. ^ Arreola, Maria; Coronado, Patricia; Hendee, Alex; Kirkpatrick, Morgan; Nadolski, Sophie; Saheb, Fauz; Self, Stefan; Sharif, Yasmine; Trammell, Philip; Benz, Benz (2015). "Viability of Silphium albiflorum in Tarrant County" (PDF). Post Oak & Prairie Journal. 1 (3): 14–18.
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Silphium albiflorum: Brief Summary

provided by wikipedia EN

Silphium albiflorum, commonly known as white rosinweed, is a species of flowering plant in the family Asteraceae. It is native to the United States, where it is endemic to the state of Texas. Its natural habitat is in open, calcareous prairies.

It is a tall perennial with rigid, deeply divided leaves. It produces heads of white flowers in late spring through mid-summer. It is a slow growing, but extremely long-lived plant.

Due to its narrow habitat requirements and low population recruitment, it is considered to be a highly conservative species. It fares poorly in areas of suburban development, and faces significant threats in parts of its range.

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cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
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wikipedia EN