taxonID	type	description	language	source
77A761D0ECBD4FD061326B649B43DAFB.taxon	type_taxon	Type species: — Thismia aseroe Becc., 1878.	en	Siti-Munirah, Mat Yunoh, Mohamad Alias, Shakri (2025): Thismia aliasii (Thismiaceae), a new species from Terengganu, Peninsular Malaysia. PhytoKeys 254: 175-188, DOI: 10.3897/phytokeys.254.136085
77A761D0ECBD4FD061326B649B43DAFB.taxon	discussion	Ten species of the subsection occur in Peninsular Malaysia (T. alba, T. aseroe, T. chrysops, T. domei, T. fumida, T. grandiflora, T. malayana T. ornata, T. racemosa and T. aliasii), with five of them (T. alba, T. aliasii, T. aseroe, T. domei and T. ornata) occurring in the state of Terengganu. Whereas most of these species are characterized by tepal appendages equal in size and shape, in T. aliasii the appendages of the inner tepals are longer than those of the outer tepals. In addition, the stamen connectives laterally raised to form a conspicuous interstaminal rib are a unique feature of T. aliasii that is not found in the other species of T. subsect. Odoardoa.	en	Siti-Munirah, Mat Yunoh, Mohamad Alias, Shakri (2025): Thismia aliasii (Thismiaceae), a new species from Terengganu, Peninsular Malaysia. PhytoKeys 254: 175-188, DOI: 10.3897/phytokeys.254.136085
5A527BBD3783531E8BDE11ED7CC76107.taxon	description	Figs 4, 5, 6	en	Siti-Munirah, Mat Yunoh, Mohamad Alias, Shakri (2025): Thismia aliasii (Thismiaceae), a new species from Terengganu, Peninsular Malaysia. PhytoKeys 254: 175-188, DOI: 10.3897/phytokeys.254.136085
5A527BBD3783531E8BDE11ED7CC76107.taxon	diagnosis	Diagnosis. Thismia aliasii is very similar to the species of the T. subsection Odoardoa, as the tepals are the same in shape and size. However, the tepal appendages of the new species are of unequal length, the inner ones are longer than the outer ones, while the tepal appendages of the other species are of equal length. In addition, in the new species the margins of the individual connectives are raised abaxially into the conspicuous rib, whereas connectives are almost flat abaxially in the rest of the species.	en	Siti-Munirah, Mat Yunoh, Mohamad Alias, Shakri (2025): Thismia aliasii (Thismiaceae), a new species from Terengganu, Peninsular Malaysia. PhytoKeys 254: 175-188, DOI: 10.3897/phytokeys.254.136085
5A527BBD3783531E8BDE11ED7CC76107.taxon	description	Description. Achlorophyllous herb, up to ca. 11 cm tall, mostly glabrous (where not stated otherwise). Roots vermiform, unbranched, ca. 1.5 mm in diameter, light brown. Stem erect, up to 56 mm long, 1.8 – 2 mm in diameter, white-cream to light brown, bearing 1 – 2 flowers. Leaves up to 5, spirally arranged (arranged denser at stem base and looser at apex), triangular to narrowly triangular (shorter at stem base and longer and narrower at stem apex), scale-like, apex pointed, margin almost entire to slightly irregularly serrate, up to 7 mm long, ca. 2 mm wide at base, colored similar to stem. Flowers terminal and solitary, or in 2 - flowered terminal inflorescence, actinomorphic, ca. 58 mm long (including ovary, floral tube, tepals and tepal appendages when erected). Involucral bracts 3, similar to upper leaves, triangular to narrowly triangular, scale-like, acute, with entire margin, 8 mm long, ca. 2.5 mm wide at base, white-brownish / light brown. Pedicel to 1.5 mm long at anthesis, to ca. 4 mm long after anthesis, white-brownish. Floral tube obovoid funnel-shaped, 20 mm long, ca. 4 mm wide at base, ca. 8 mm wide at middle, ca. 10 mm wide distally; outer surface with minute glands, orange to sepia-brown, with 12 darker longitudinal ribs; inner surface smooth or rough, almost similar color to the outer surface, with transverse bars. Tepals 6, free, spreading, triangular, apex acute, 7 mm long, ca. 1 – 1.5 mm wide (ca. 1.5 mm at base), smooth, color similar to flower tube (dark brown at apex, yellow-orange at back), each apically bearing a tentacle-like appendage 0.5 mm wide and narrowing towards the apex; appendage of outer tepal up to 3.5 mm long, dark brown; appendage of inner tepal ca. 26 – 32 mm long, brownish. Annulus moderately raised, hexagonal in outline, ca. 6 mm in diameter, with ring width ca 1.5 mm, brown-orange, aperture ca. 3 mm in diameter. Stamens 6, pendulous from annulus; filaments laterally pale orange, otherwise translucent white; connectives broad and flattened, fused laterally into a tube, shortly papillose, translucent white, with hairs around thecae, with margins abaxially raised to form conspicuous ribs along the sutures between the connectives, ribs distally slightly protruding beyond the apex of supraconnective; interstaminal glands conspicuous, placed between bases of lateral appendages; supraconnective with 3 filiform apical appendages (central appendage ca. 2 mm long and paired appendages ca. 2.4 mm long) and with 2 acute hook-like subapical appendages ca. 0.6 mm long positioned adaxially between the apical appendages and the lateral appendage; lateral appendage skirt-like, projecting towards the floral tube and not reaching the supraconnective apex, translucent white and brown on sides, lateral margin wavy. Ovary red, pale cream proximally and blackish distally; unilocular; placentas 3, free, column-like, arising at ovary base; ovules numerous. Style dark blackish-orange, ca. 1.2 mm long; stigma ca. 1.4 mm long, papillose, 3 - lobed, erect, lobes ± rectangular, bifurcate at the apex, black-greenish. Fruit dehiscent, cup-shaped, ca. 6 mm high, ca. 7 mm in diameter, pale brownish, darker in the upper part. Seeds long fusiform ca. 0.75 mm long, ca. 0.25 mm wide.	en	Siti-Munirah, Mat Yunoh, Mohamad Alias, Shakri (2025): Thismia aliasii (Thismiaceae), a new species from Terengganu, Peninsular Malaysia. PhytoKeys 254: 175-188, DOI: 10.3897/phytokeys.254.136085
5A527BBD3783531E8BDE11ED7CC76107.taxon	distribution	Distribution. Endemic to Terengganu, Peninsular Malaysia. Currently only known from the type locality, Gunung Chemerong (Figs 2, 3, 7).	en	Siti-Munirah, Mat Yunoh, Mohamad Alias, Shakri (2025): Thismia aliasii (Thismiaceae), a new species from Terengganu, Peninsular Malaysia. PhytoKeys 254: 175-188, DOI: 10.3897/phytokeys.254.136085
5A527BBD3783531E8BDE11ED7CC76107.taxon	etymology	Etymology. The species is named after Mr. Alias (the second author), a current ranger of the Terengganu Forestry Department (JPNT), who is also a freelance photographer (known as John Sp) and who was the first to discover the species.	en	Siti-Munirah, Mat Yunoh, Mohamad Alias, Shakri (2025): Thismia aliasii (Thismiaceae), a new species from Terengganu, Peninsular Malaysia. PhytoKeys 254: 175-188, DOI: 10.3897/phytokeys.254.136085
