The words or terms in red
(actually dark orange) in the text are defined in a
The genus Sonchus
is in the tribe Lactuceae of the
family. The genus includes
And all species have a milky sap.
The stems are erect, smooth and leafy.
The leaves are basal
from more or less
toothed and coarsely
clasping the stem.
The inflorescences are in
The flower heads are
The involucres are swollen at base,
the phyllaries are generally in 3 series,
outer many, short-triangular, those of inner 2 series linear, tapered;
the receptacles are more or less flat.
The fruits have a pappus of many fine,
There are over 50 Species in the genus, that grow in Eurasia and Africa.
Sonchus species have been
introduced from Europe
in North America and are now widely established.
Many sources, copied from one another ? say that the genus name
is from the Greek sonchos, the plant's initial name, and means
hollow in reference to the stems.
I checked in my Dictionnaire Grec Français by Anatole Bailly,
also called Le Grand Bailly, one of the quite renowned
dictionary of classical Greek, and I could not find one entry starting in
σον (son) or
σων (sôn), so...
The taxonomy of the species of
Sonchus genus that can be found in Québec is:
Sonchus arvensis L. (photography above) with two
- Sonchus arvensis L. var. arvensis
- Sonchus arvensis L. var. uliginosus
Günther, Grab. & Wimm.
Sonchus asper (L.) Hill
- Sonchus oleraceus L.