Solidago caesia Linnaeus
The words or terms in red
(actually dark orange) in the text are defined in a
is a perennial plant,
native to North America,
1 to 4 feet high, with flower heads
in small isolated clusters strung out along the stem, usually on a single stem.
The plant Asteraceae
The genus name
is said to be first from the Latin adjective
solidus that means dense, solid, massive, compact, substantial,
and, in a figurative sense, firm, and from the
Latin verb agere of first person singular present indicative ago
that means something like to do and to make,
so that Solidago would refer to the plant's supposed ability to heal.
In latin, cęsius means blue-green, greenish-blue.
More exactly. it was used by the Romans in locutions like
cęsii oculi or virga cęsia for eyes (oculi),
or the eyes of a virgin (virgo)
to speak of eyes were the blue was the dominant
color or of a blue leaning towards an other color, green, violet, i.e.
the French adjective pers.
The epithet refers then
to the stem of the plant that is usually, but not always, blue-green.
Some of the vernacular names of
Solidago caesia are:
Blue stemmed Goldenrod, Blue-Stemmed Goldenrod, Bluestem,
Wreath Goldenrod, Axillary Goldenrod and Woodland Goldenrod.
The standard French vernacular name is Verge d'or bleuātre.
Solidago caesia has also been known as:
- Aster caesius (L.) Kuntze
- Solidago axillaris Pursh
- Solidago caesia L. forma axillaris (Pursh) House
- Solidago caesia L. var. axillaris (Pursh) A.Gray
Solidago caesia is one of the Solidago somewhat easy to identify,
by its habitat, wood usually, by its small clusters of yellow flower heads
in the leaf axil in the upper third of the stem, and by its long,
lance-shaped leaves. It could eventually be confused with:
but it is not difficult to differentiate Solidago caesia
from the above three species.
- Solidago nemoralis but the later is shorter,
it grows in the open, is puberulent,
- Solidago hispida but the later has a very hairy,
- Solidago flexicaulis that also grows in woods,
with its flower heads in leaf axils, but the stem of
Solidago flexicaulis is somewhat a bit in zigzag
(hence the epithet of the name),
its leaves are larger, more deeply toothed, its stem is thicker.
Solidago caesia is a slender plant, wandlike, with showy large
ray florets in tufts
arising from the axils of the leaves along the stem.
- Usually single; at times bluish or purplish but may also be green.
- 1 to 4 feet high.
- Round, smooth; arching.
- Sharply pointed with feather veins.
- Tapering at both ends.
- With margins nearly smooth
on upper leaves, but becoming more strongly dentate
toward the plant base.
- Up to 6 inches long and up to 1 3/4 inches wide.
- In small scattered clusters from axils of leaves.
- In larger terminal cluster.
- With three to five yellow
and three to seven disk flowers.
- With the phyllaries tip rounded.
- Blooming in the fall.
- Achenes up to 1/8 inch long.
- With a small pappus.
One can find Solidago caesia
in rich soil of moist open woods, thickets, clearings, forest edges.
Solidago caesia is found in Canada, from Ontario to Nova Scotia.
It is also found in the eastern half of the USA, west to Texas, Oklahoma,
Missouri, Illinois and Wisconsin.
The map, from Flora of North America shows the US States and
Canadian provinces where Solidago caesia can be found.
The photos of the gallery were taken either with one of the following:
The title in the window shows the date when the picture was taken,
i.e. jan_30_06... would mean that the photo was taken on the 30th of
January, the 06 is for the 6th picture taken that day.
- Fuji Mx 700.
- Minolta DiMAGE 7.
- Nikon 2200.
- EPSON Perfection 1650 scanner.
The month, day and picture number might be followed by a letter:
and if there is no letter it's obviously the Minolta.
- f for the Fuji.
- n for the Nikon.
- s for the EPSON (scanner).
Click on the thumbnails to get larger view.
The original photos are usually in TIFF format,
the photos shown are generally in JPEG format,
usually of dimension one half (surface one quarter)
for loading time reduction.
The leaves were scanned at 300 dpi, and the picture dimensions were
then reduced by one half (surface by one quarter).
This allows to get the leaves dimensions.