chrisbrooks's picture

Greater Chickweed

Observed: 2nd August 2012 By: chrisbrooks
Sea Fish AtlasSeaKeys
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Greater Chickweed
Greater Chickweed
Greater Chickweed
Description:
Identifications
Species interactions

No interactions present.

Species with which Water Chickweed (Myosoton aquaticum) interacts

Comments

landgirl's picture

Myosoton aquaticum

Agreeing with Myosoton aquatica - I think I can see 5 styles, which would exclude Stellaria. Also wavy edges to leaves.

martinjohnbishop's picture

Yes styles 5

not 3 as in Stellaria. But surprisingly http://www.theplantlist.org/tpl1.1/record/kew-2369482 !

landgirl's picture

Plantlist

The name change was probably because it was recognised as not belonging to Stellaria.

martinjohnbishop's picture

The reverse; TPL says

Myosoton aquaticum (L.) Moench is a synonym of Stellaria aquatica (L.) Scop.

Greenberg & Donoghue say
http://donoghuelab.yale.edu/sites/default/files/208_greenberg_taxon11_0.pdf

"While a few species of Stellaria appear in Sclerantheae,
the majority form a clade within Alsineae; however, when all
of the species are considered, Stellaria is non-monophyletic,
and forms a grade subtending Cerastium, a few species of
Arenaria, and the smaller genera Pseudostellaria, Holosteum,
Moenchia, Myosoton, Plettkea, and Lepyrodiclis. Cerastium
forms a clade nested within Stellaria."

From Flora Europaea:
Stellaria has 3 styles and the capsule dehisces with 6 teeth.
Myosoton has 5 styles and the capsule dehisces with 5 teeth.

Worryingly Greenberg & Donoghue also say
"Misidentifications, if they exist, often persist in GenBank and can be incorporated
into multiple studies, giving a false impression of independent
support. Indeed, it is worrisome that sequences of several of
the species that seem out of place (e.g., Velezia regida in Dianthus;
Allochrusa versicolor in Gypsophila; Plettkea cryptantha
and Myosoton aquaticum in Stellaria) in our analyses were
obtained from GenBank."