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Utricularia: The Bladderworts

The genus Utricularia contains the most species of carnivorous plants, up to 230 species according to some authorities. The various species can be loosely divided into 3 groups: aquatic, terrestrial and epiphytic.
     The true aquatic species grow as free-floating masses of thin stems. Terrestrial species are found in bogs or seasonally wet marshes. Epiphytic species occur in deep rocky seeps, damp mossy trees or even inside bromeliads.
     All Utricularia species trap their prey by the same method. Tiny sacs are scattered along the subterranean portion of the plant, or throughout the whole plant in aquatic species. Fine hairs on the sacs are triggered by contact with minuscule insects. This action causes a trap door on the sac to open suddenly and the insect is sucked inside.
     Bladderworts are popular due to the appeal of their colourful, intricate orchid-like flowers. The foliage of many species also provides an attractive ground cover in terrariums.

 

Utricularia species

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Utricularia bisquamata
Origin: South Africa
Description: Short, narrow green leaves topped by tiny multi-coloured flowers raised up to 4" on thin stems.    
Hardiness: Zone 9
Price: $6.00 per clump

Coming

Utricularia dichotoma
Origin:
Australia
Description: Purple fan-like flowers raised above small green elliptic leaves held low to the growing media.
Hardiness: Zone 10
Price: $6.00 per clump

Coming

Utricularia gibba
Origin: North America, Central America
Description: This aquatic species produces yellow flowers above a floating mass of thread-like foliage.
Hardiness: Zone 5 or colder
. U. gibba drops turions (winter buds) that overwinter on the bottom of ponds.  
Price: $6.00 per clump

Utricularia sandersonii
Origin:
South Africa
Description: The tiny orchid-like pale violet flowers are held above masses of small, low obovate green leaves.
Hardiness: Zone 9
Price: $6.00

Coming