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Senecio lacustrinus I.Thomps.
Family Asteraceae
Senecio lacustrinus I.Thomps. APNI*

Description: Annual to c. 0,8 m high, erect.

Leaves in mid-region of stems mostly 3–12 cm long, mostly divided, occasionally not, base attenutate or becoming dilated, margin with a few teethn ot denticulate; undivided leaves narrow-elliptic; divided leaves with 2 or 3 narrow-triangular or linear to narrow-linear segments; uppermost leaves with base more dilated with often long segments.

Inflorescence of 3–12 flowerheads; bracteoles 5–8 not imbricate at anthesis, narrow-ovate to narrow-lanceolate, 1.5–3.0 mm long; involucral bracts mostly c. 13, 5–9 mm long. Florets 60–80; ligulate florets often c. 8, fewer than involucre bracts; corolla of disc florets 5–6 mm long.

Disc achenes 2.8–4.0 mm long, 50–60 % longer than the involucral bracts, golden, brown, olive-brown or green, papillose hairs obscuring 50–70% of surface, appressed and slightly divergent.; ray achenes commonly 3.0–4.5 mm long, dark-red. Pappus c. 5 mm long.


Flowering: Flowers mostly winter to spring.

Distribution and occurrence: Occurs in southern Australia in a broad band between latitudes 26 - 32 degrees S.

Grows in sandy or loamy soils, usually associated with ephemeral lakes and other water sources.
NSW subdivisions: NWP, NFWP, SFWP
Other Australian states: Qld S.A. W.A.
AVH map***

Text by Louisa Murray
Taxon concept: Ian. R. Thompson (2005) Taxonomic studies of Australian Senecio (Asteracece): 5. The S. pinnatifolius/S. lautus complex. Muelleria 21: 23-76

APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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