Monday, February 13, 2017

[Botany • 2017] Thismia inconspicua • A New Mycoheterotrophic Species (Thismiaceae) from Borneo

Thismia inconspicua Sochor & Dančák


A new species belonging to the mycoheterotrophic genus Thismia is described and illustrated. Thismia inconspicua was found in a lowland mixed dipterocarp forest in Ulu Temburong National Park, Brunei Darussalam. It is characterized by its sepia-brown perianth with free equal lobes with very short terminal appendages, two pairs of appendages on connective apices, perianth tube displaced from the ovary axis and short stem. DNA sequence data from commonly studied nuclear and mitochondrial loci are provided. Phylogenetic analysis confirmed the close relationship with other members of section Thismia, subsection Odoardoa. An updated determination key of Thismia species of Borneo is included.

Keywords: atpA, Burmanniaceae, Malesia, SSU rDNA, Monocots, Borneo

FIGURE 2. Thismia inconspicua Sochor & Dančák:
flowering plant (A), plants in different developmental stages (B, C, E), capsule with stigma (D), outer view of stamens (F), appendages on connective apices (G), mature capsule with seeds (H) and the type locality (I)  

Thismia inconspicua Sochor & Dančák, sp. nov.

Thismia inconspicua differs from congeneric species in having the following combination of morphological traits: short stem, all perianth lobes free and equal, tapering into very short terminal appendages, perianth tube displaced from the ovary axis, two pairs of dimorphic appendages on connective apices, three-lobed stigma with lobes entire or bifid.

Etymology:— The specific epithet reflects the inconspicuous colour and appearance of the plants on decaying wood during flowering period.


Michal Sochor, Rahayu Sukmaria Sukri, Faizah Metali and Martin Dančák. 2017. Thismia inconspicua (Thismiaceae), A New Mycoheterotrophic Species from Borneo.
 Phytotaxa. 295(3); 263–270. DOI:  10.11646/phytotaxa.295.3.7

“We called it Thismia inconspicua, which reflects the fact that the plant is brown, very small and inconspicuous on rotting leaves and rotting wood where it grows.”

Čeští vědci náhodou objevili nový druh rostlin. Dostaly jméno hvězdnatky
Radio Prague - Czech botanist discovers new Thismia plant in Borneo rainforest via  @RadioPrague

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