Senecio oerstedianus Benth.

Species

Angiosperms > Asterales > Asteraceae > Senecio

Characteristics

Erect herb, 30-50 cm tall; stems arising singly (or loosely clustered?); rhizome coarse, creeping, 10-15 mm in diam.; pubescence densely white-lanate throughout except on the upper surface of leaves, which are early irregular-glabrate, on stems unevenly glabrescent. Leaves evenly distributed along the stem but reduced upwards, alternate, pinnately veined, thick and coriaceous, at least in dried specimens, the lower and middle leaves lanceolate to nar-rowly ovate, acuminate, tapering at the base, the margin serrate-dentate, edges of the teeth weakly revolute, the blades 6-10 cm long, 2-5 cm wide, about 2-21/2 times longer than wide; petiole 1/2-1/3 as long as the blade, sheathing-clasping at the base. Inflorescence a single, terminal, congested to loose, paniculate to subcorymbiform cyme of 10-20 heads, supported by stout, densely lanate peduncles. Heads radiate, yellow; involucral bracts ca. 21, narrowly lanceolate-subulate, greenish, with narrow, scarious margins, minutely erose-tipped, conspicu-ously but unevenly lanate tomentose on the outer surface; calyculate bracts few, linear-subulate, less than 5 mm long; receptacle flat, naked; ray florets ca. 8, ligule 8-10 mm long, 1 mm or more wide in dried specimens; disc florets 20-30, the corolla 7-8 mm long, the tube and limb not sharply distinguished. Achene columnar, glabrous, 2-3 mm long; pappus of copious, white, capillary bristles, equalling or slightly exceeding the involucral bracts.
Life form -
Growth form herb
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Mature height (meter) 0.3 - 0.5
Root system rhizome
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Environment

Light -
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Hardiness (USDA) 9-12

Usage

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Edible -
Therapeutic use -
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Cultivation

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Germination duration (days) 10 - 21
Germination temperacture (C°) 18 - 23
Germination luminosity light
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Images

Senecio oerstedianus unspecified picture

Distribution

Senecio oerstedianus world distribution map, present in Costa Rica, Guatemala, Mexico, and Panama

Identifiers

LSID -
WFO ID wfo-0000098060
COL ID 4WM8K
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INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Senecio oerstedianus