Taxon  Report   8370 
Xylorhiza cognata  (H.M. Hall) T.J. Watson
Mecca aster,  Mecca woodyaster
Xylorhiza cognata
© 2011 Aaron E. Sims
Click on a photo to see it bigger.
Xylorhiza cognata
© 2011 Aaron E. Sims
Xylorhiza cognata, a dicot, is a perennial herb that is native to California and is endemic (limited) to California.
CNPS Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).   8th Edition

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one or more occurrences
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Plant Characteristics
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Bloom Period
Xylorhiza cognata
© 2012 Keir Morse
Genus: Xylorhiza
Creosote Bush Scrub
Name Status:
Accepted by TJM2 + CNPS + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Aster cognatus
PLANTS: Aster standleyi
PLANTS: Xylorhiza standleyi
CNPS + PLANTS: Machaeranthera cognata
More information about  Xylorhiza cognata
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


Search the International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation,
with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria.
[web application]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Jan 19, 2018).

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