Thismia brunneomitra, another new species of Thismia (Thismiaceae) from Ulu Temburong, Brunei Darussalam

Abstract

A new species of Thismia (Thismiaceae) from northwest Borneo is described and illustrated. Thismia brunneomitra was discovered in 2015 in lowland mixed dipterocarp forest in the Ulu Temburong National Park, Temburong district of Brunei Darussalam. The new species is characterized by brown to blackish flowers with twelve darker vertical stripes on the perianth tube, inner tepal lobes that are connate to form a mitre with three very short processes at the apex, three-toothed apical margin of the connective and large wing-like appendage of the connective. An updated determination key of Thismia species found in Borneo is included.

Flora of Bokor National Park VII: Thismia bokorensis (Burmanniaceae), a new species representing a new generic record

“…Considering that the majority of these species were collected only once (Jonker 1948), and that many new species have recently been discovered, especially from various Southeast Asian countries (e.g., Tsukaya & Okada 2012, Dančák et al 2013, Nuraliev et al 2014, Truong et al 2014, Chantanaorrapint & Sridith 2015, Li & Bi 2013, Hroneš et al 2015, many more undescribed species are probably still hidden in the tropical rain forests of Southeast Asia.…”

Thismia brunneomitroides (Thismiaceae), a new mycoheterotrophic species from southern Thailand

“…Among the members of the section Sarcosiphon, T. brunneomitroides is most similar to T. brunneomitra in having inner tepal lobes connate to form a mitre with three projections at the apex and large lateral appendage of the connective (Hroneš et al 2015), but these two species are distinguished by morphological characters shown in Table 1. Thismia brunneomitroides also resembles T. episcopalis (Beccari 1877: 250) Mueller (1891 but differs by the mitre having 3 acute projections at apex (vs. obtuse without any projection in T. episcopalis) and mostly 2 teethed apical part of connective (vs. 3 teethed apical part of connective).…”

“…On the other hand, many new species have been discovered recently in Southeast Asian countries (e.g. Chantanaorrapint 2012, Tsukaya & Okada 2012, Dančák et al 2013, Nuraliev et al 2014, Truong et al 2014, Hroneš et al 2015, Tsukaya et al 2017, suggesting that more species remain to be discovered especially in the tropical rain forests of Southeast Asia.…”

“…The Thai-Malay Peninsula is one of the species diversity hotspots of the genus Thismia (Hroneš et al 2015), and currently 12 species of Thismia are known from the area (e.g. Jonker 1948, Chantanaorrapint & Chantanaorrapint 2009, Chantanaorrapint & Sridith 2007, 2016.…”

Thismia bryndonii (Thismiaceae), a new species from Maliau Basin, Sabah, Borneo

“…Many new species in this genus have been discovered, and 12 have been described after 2010 (e.g., Dančak et al 2013, Nuraliev et al 2014, Chantanaorrapint & Sridith 2015, Li & Bi 2013, Hroneš et al 2015. Considering that the majority of these species were collected only once (Jonker 1948), it is likely that many more undescribed species remain hidden in the forests, particularly in the tropical rain forests of Southeast Asia.…”