The Carnivorous Plant FAQ v. 12

Utricularia section Meionula
Species Range Habit1
U. geoffrayi Thailand, Cambodia, Vietnam T
U. hirta India to Southeast Asia T
U. minutissima India to Japan, Australia T

Q: About Utricularia subgenus Bivalvaria section Meionula

A: This section has had an interesting and difficult history.

At one point its members were considered worthy of being treated as separate genera (Meionula Raf. and Trixapias Raf.). In his 1989 monograph, Taylor discussed the section's apparent (but admittedly weak) affinities to section Australes. Subsequently, convincing arguments were made to move section Australes from subgenus Utricularia to subgenus Bivalvaria.

It was perhaps only a matter of time that section Meionula was moved as well, as it was (for example) in Ellison & Adamec (2018).

Ellison & Adamec (2018) made other changes to this little section....

First, they moved Utricularia subramanyamii from section Oligocista here, which I do not agree with.

Second, they recognized Utricularia ramosissima Wakabayashi, which I think is probably a synonym for Utricularia geoffrayi.

Utricularia geoffrayi
A form of this from Thailand that has an astonishingly branched inflorescence that bears up to 100 flowers was described as a separate species (Utricularia ramosissima) but that designation did not, alas, stick.

Utricularia hirta
A species with hairs covering its entire inflorescence. While interesting, the real reason I mention this species is the candid note Taylor mentions in his monograph. He sadly concluded that a species named after him, U. tayloriana, was really just a synonym for this species. Bummer!

Page citations: Rice, B.A. 2006a; Jobson et al. 2003; Taylor, P. 1989; Wakabayashi, H. 2010a; personal observations.

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Revised: 2018
©Barry Rice, 2018