Seringia (Wilkins & Whitlock, 2016)

Cheek, M., Wanma, J., Jitmau, M. & Jebb, M., 2018, Seringia (Byttneriaceae / Malvaceae - Byttnerioideae) new to Southeast Asia and S. botak endangered in Indonesian New Guinea grassland and savannah, Blumea 63 (2), pp. 150-156 : 155

Key to species of Seringia with fan-shaped stellate hairs on adaxial calyx and red-apexed staminal filaments Modified from Wilkins & Whitlock (2016)

1. Upper and lower surfaces of calyx, stem and both surfaces of the leaves (except the midrib) without long, conspicuous glandular hairs (if present, then only on the margins of the calyx and leaf-blade, or short and completely concealed below the stellate hairs).......................... 2

1. Outer surfaces of calyx, stem and both surfaces of the leaves with conspicuous glandular hairs extending well beyond the stellate hairs................................... 3

2. Glandular hairs absent, or if present few and all concealed below the stellate hairs on the stem and leaf-blade; inflorescence (1- or) 2- or 3-flowered, bracts green. — Australia...................................... S. corollata

2. Glandular hairs dense, conspicuous and extending beyond the stellate hairs on margins of calyx and margins of leaf blades and on the abaxial midrib; inflorescence 1-flowered, bracts red. — New Guinea................. S. botak

3. Mature leaf-blade flat, minor veins conspicuous below. Leaf and calyx lobes with apex acute, apiculus absent.......................................... S. adenolasia

3. Mature leaf-blade recurved, minor veins inconspicuous below. Leaf and calyx lobes with apex acuminate (rarely acute), mainly with apiculus............. S. hookeriana