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Laennecia coulteri

Laennecia coulteri

Laennecia coulteri

 

 

 

 

 

 

Laennecia schiedeana. Synonym: Conyza schiedeana. (Pineland Woolwort)
Asteraceae (Sunflower Family)

Foothills, montane. Openings, disturbed areas, meadows, woodlands. Summer, fall.
Vallecito Creek Trail, September 4, 2015.

Laennecia schiedeana and Laennecia coulteri are very similar, separated from each other in various floras by:

the presence in L. schiedeana of a minute (.3 to 1.4 mm) pistillate ligule (ray flower petal) and absence of this ligule for L. coulteri;

the hairiness of their surfaces: L. schiedeana has villous hairs (long, soft, shaggy, not matted) and L. coulteri has long tangled hairs (arachnoid to floccose)

the width and texture of the phyllaries: L. schiedeana has wider margins that are strongly hyaline (thin, membranous, and translucent.

L. schiedeana is found from about 8,000' to 10,000' and L. coulteri from about 4,000' to 8,000'.

The first specimen of this plant was collected for science in Mexico by Christian Schiede and Ferdinand Deppe and was named Erigeron schiedeanum by Christian Lessing in 1830. Guy Nesom renamed the species Laennecia schiedeana in 1990 in his Taxonomy of the Genus Laennecia.

Christian Schiede was a German physician and botanist who collected in Mexico. Click for more biographical information about Schiede.

The genus Laennecia was named by Alexander Cassini in 1822 and honors Rene Laennec, doctor and inventor of the stethoscope. Click for more biographical information about Laennec.

Laennecia coulteri

Laennecia schiedeana. Synonym: Conyza schiedeana. (Pineland Woolwort)
Asteraceae (Sunflower Family)

Foothills, montane. Openings, disturbed areas, meadows, woodlands. Summer, fall.
Vallecito Creek Trail, September 4, 2015.

Range map © John Kartesz,
Floristic Synthesis of North America

State Color Key

Species present in state and native
Species present in state and exotic
Species not present in state

County Color Key

Species present and not rare
Species present and rare
Species extirpated (historic)
Species extinct
Species noxious
Species exotic and present
Native species, but adventive in state
Eradicated
Questionable presence

Laennecia coulteri

Range map for Laennecia coulteri

Laennecia schiedeana

Range map for Laennecia schiedeana