The Carnivorous Plant FAQ v. 12

Q: Utricularia and conservation

A: Most Utricularia species have relatively large ranges, and this protects them against significant damage at human hands. However, there are a few clear indicators that habitat destruction and degradation---which is reducing the habitat available to life on Earth---is likely to have an increasing impact on Utricularia:

1)According to Taylor, twenty species have been collected as few as five times. This suggests they are either in very under-studied areas, or are very rare species with extremely limited populations. These species are: U. albiflora, U. antennifera, U. aureomaculata, U. buntingiana, U. choristotheca, U. corynephora, U. forrestii, U. georgei, U. helix, U. leptorhyncha, U. letestui, U. naviculata, U. perversa, U. petersoniae, U. physoceras, U. salwinensis, U. steyermarkii, U. terrae-reginae, U. tridactyla, and U. warburgii.

2)According to Taylor, an additional eight species are only known from their original collections. Again, it is not clear if these are rare plants, or simply undercollected plants: U. cheiranthos, U. determannii, U. garrettii, U. hintonii, U. kenneallyi, U. mirabilis, U. peranomala, and U. rhododactylos.

3)Utricularia podadena has only been collected twice from locations that have been destroyed by agriculture, so it is probably extinct.

4)The Japanese U. dimorphantha is highly endangered in the wild.

5)Some aquatic species such as U. stygia are extremely rare in Europe, with many of its original sites having been destroyed.

6)Utricularia amethystina is apparently extinct in the USA, although populations still exist in Latin America.

Page citations: Rice, B.A. 2003c, 2006a; Taylor, P. 1989; personal observations.

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Revised: 2018
©Barry Rice, 2018