Key to Thladiantha longipedicellata and similar species

1a. Male bracts incised ........................................................................................................................................................... T. cordifolia b. Male bracts dentate.............................................................................................................................................................................2

2a. Vestigial leaves present. Calyx segments linear, margin entire, indistinctly 3-veined, ca. 12 × 1 mm. Male peduncle short, 1–2.5(– 3.5) cm. Male pedicel long, (1.8–) 3–7 cm, 2 to 3 times as long as bracts ............................................................. T. longipedicellata b. Vestigial leaves absent. Calyx segments narrowly ovate, apex 3-lobed, distinctly 3-veined, ca. 15 × 4–6 mm. Male peduncle long, 3–10 cm. Male pedicel short, 0.5–1 cm, nearly as long as bracts ............................................................................... T. grandisepala