The Carnivorous Plant FAQ v. 12

Utricularia section Phyllaria
Species Range Habit1
U. brachiata Asia L
U. christopheri Nepal L
U. corynephora Myanmar, Thailand L
U. forrestii China, Myanmar L
U. furcellata India, Nepal L/T
U. garrettii Thailand L
U. inthanonensis Thailand L/T
U. kumaonensis Asia L/T
U. moniliformis Sri Lanka L
U. multicaulis Asia L/T
U. phusoidaoensis Thailand L/T
U. pulchra New Guinea L/T
U. salwinensis China L/T
U. spinomarginata Thailand L/T
U. steenisii Sumatra L/T
U. striatula Africa, Asia L/E
1L=lithophte; T=terrestrial; E=epiphyte.

Q: About Utricularia subgenus Bivalvaria section Phyllaria

A: My, my, what a fairly large section, and I have never set eyes upon any of them even in cultivation! These plants are lithophytes, in general a group of plants very poorly represented in cultivation.

One of the most interesting features that characterize this section is the starfish-like appendage at the trap entrance with a set of distinctive gland-arms. The seeds also usually have very strange outgrowths on their surfaces---not just little bumps, they often look like long antennae, spikes, or feelers. Very odd.

This group of species includes some real oddities, including a number which produce tubers (people who think that only species in section Orchidioides produce tubers should pay better attention!). There are different tuber morphologies I highlight below, to illustrate the diversity in this section.

Utricularia brachiata
As a first example of tuber form, this plant has a small rosette of leaves, and underneath each rosette is a single tuber only a few mm long. The leaves, bladderous stolons, and inflorescence apparently emerge directly from the little tuber.

Utricularia christopheri
As a second example of tuber form, this plant's tuber is connected by a short vertical stalk to a nexus point from which emerge all the leaves, inflorescence, and most (or all) of the bladderous stolons.

Utricularia kumaonensis
As a third example of tuber form, this plant's tuber is absent! (Or at least has not yet been observed.)

Utricularia moniliformis
As a fourth example of tuber form, this plant has multiple tubers that are strung together like a string of sausages.

Utricularia striatula
This species, which apparently lacks tubers, grows on wet rocks and moist tree trunks---hence the epiphytic classification in my table.

Page citations: Rice, B.A. 2006a; Suksathan, P., and Parnell, J.A.N. 2010; Taylor, P. 1989; personal observations.

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Revised: 2018
©Barry Rice, 2018