Illinois Natural History Survey - University of Illinois

Senecio glabellus
Ragwort, Cress-leaf groundsel
Taxonomy

Synonyms: Packera glabella

Subspecific taxa:

Classification:

Other taxonomic & nomenclature sources: USDA Plants;  ITIS;  The Plant List;  IPNI

Images

   
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Species Distribution
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More about map & occurrence records

County Map Legend
Absent:
Not known from county
Medium confidence:
Medium or unknown confidence;
often old records or unverifiable observations
Medium-high confidence:
Often observations by expert botanists
High confidence:
Often vouchered herbarium records
Planted / introduced:
Native species introduced outside historic range,
or only in planted locations within county (e.g., restorations)
Historic / extirpated:
Only historic records for the species; likely extirpated
(Note that this category is not yet functional)

North American distribution maps for this species: FLNA;  USDA Plants;  BONAP;  BISON

Collections, Observations & Flowering by Month [?]

J
0
F
0
M
0
A
0
M
0
J
0
J
0
A
0
S
0
O
0
N
0
D
0

Collections & Observations by Decade [?]

Species Status

Status/Listing: No Information

Notes:

Origin: Native

Species Description

General: Dicot-herb, biennial, annual

Roots: adventitious, fibrous

Shoots: alternate leaf arrangment; simple leaf type; serrate, lobed (pinnately), parted (pinnately) leaf margin; Pinnate leaf venation; linear, oblong leaf shape

Inflorescence: head

Flowers: perfect, unisexual, monoecious; complete, incomplete, regular, irregular; yellow; epigynous ovary position

Fruit: achene

Physiology: autotrophic

Reproduction: sexual

Ecology & Natural History

Habitat: Species is distributed in sloughs, ditches, river valleys, and fallow fields.

ILPIN Notes: Especially in alluvial and low bottoms, it often covers large areas in early spring, forming dense stands of yellow with showy flower-head clusters. Plants are lacking the basal leaves so common in other species of this genus. Disk florets are perfect and fertile; ray florets are pistillate and fertile.

Functional Relationships:

  • Pollinators:
  • Dispersal:
  • Mycorrhizae:
  • N2 fixation:

Human Relationships:

  • Edibility [?] :
  • Showy Flowers:

Wildlife and Livestock Information:

  • Food Value:
  • Cover Value:

Coefficient of Conservatism (C-value) [?] :

  • Entire State: 0
  • Chicago Area:

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