Senecio riddellii Torr. & A.Gray

Riddell's ragwort (en)

Species

Angiosperms > Asterales > Asteraceae > Senecio

Characteristics

Subshrubs, 30–100 cm (taproots forming woody crowns). Herbage glabrous. Stems usually multiple (branching upward). Leaves ± evenly distributed (proximal often withering before flowering, pendulous); sessile or obscurely petiolate; blades linear-filiform (or irregularly pinnately divided into linear-filiform lobes), blades or lobes 4–9 cm × 1–5 mm, bases ± linear, ultimate margins entire. Heads 5–20+ in close, corymbiform arrays (involucres campanulate, 7–10 mm diam.). Calyculi usually of 3–8+ lance-linear to filiform bractlets (lengths 1 / 10 – 1 / 3 phyllaries). Phyllaries ± 13, 7–10(–12+) mm, tips green. Ray florets ± 8; corolla laminae (often falling early) 8–10 mm. Cypselae hirtellous. 2n = 40.
Life form perennial
Growth form
Growth support free-standing
Foliage retention -
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 1.0
Root system tap-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-10

Usage

Uses medicinal poison
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 10 - 21
Germination temperacture (C°) 18 - 23
Germination luminosity light
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Senecio riddellii world distribution map, present in Mexico and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:247299-1
WFO ID wfo-0000028441
COL ID 4WMV7
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Senecio riddellii Senecio spartioides var. riddellii Senecio riddellii var. parksii Senecio spartioides var. fremontii Senecio spartioides var. parksii Senecio filifolius var. fremontii Senecio riddellii var. riddellii