Blue Fleabane can relieve tooth-ache and arthritic pains. It inhabits dry grassy places, stone walls and dunes.
Blue Fleabane used to form Erigeron X Conyza being a forbidden Inter-Genera hybrid with Canadian Fleabane (Conyza canadensis) called X Conyzigeron huelsenii, the genera of which (Conyzigeron) is a semantic amalgamation of Erigeron and Conyza. This inter-genera hybrid occurs only sporadically when the two parents are present nearby - in disturbed sandy places in Southern England. This hybrid is sterile and is intermediate in hairiness between the two species with pale-mauve ray-florets (which are not splayed out and hardly protrude from the phyllaries). BSBI distribution of X Conyzigeron huelsenii. But now because the genus Conyza has been renamed Erigeron such a 'forbidden' hybrid no longer occurs. It is now a legitimate hybrid.
A new glycoside,
AcetylArabinoside, has been found in Blue Fleabane.
The essential oils obtained from the roots contains two
polyacetylene esters, 2Z,8Z-
Matricaria Ester (at 37% concentration) and Lachnophyllum Ester (at 49%) amongst many other very minor compounds (<1.4% each). The (2Z,8Z)- designation refers to the positions of the cis-bends in the positional isomer - IUPAC (E-,Z)-nomenclature.
Matricaria Esters were first found in species of Matricaria (some Mayweeds), in particular,
Scentless Mayweed (Tripleurospermum inodorum) [previously called Matricaria perforata, but now moved into the genus, Tripleurospermum where it accompanies Sea Mayweed].
Lachnophyllum Ester is a polyacetylenic compound with two triple-bonds not un-like Falcarinone found in Ivy. It is poisonous and also occurs not only in Daisy but also in Canadian Fleabane (Conyza canadensis). It was found in (Lachnophyllum gossypinum), a non-native plant which is also in the Dandelion & Daisy Family (Asteraceae).
Blue Fleabane contains derivatives of
aromadendrane-type sesquiterpenes, such as 4α-10β-alloaromadendranediol and 4β-10β-aromadendranediol. The Aromadendrane skeleton is shown with the three fused rings, one a three, another a five and the third a seven-membered ring bearing a resemblance to the Tigliane Series. Alongside it is one of the
spiro-Aromadendrane, name unknown, which is found within Blue Fleabane.