Sabah Christisonia | C. scortechinii | C. siamensis | C. sinensis | C. calcarata | C. hookeri | |
---|---|---|---|---|---|---|
Pedicel | Short-thick, ca. 1 cm long | Short-thick, ca. 1 cm long | Short-thick, ca. 1 cm long | Short-thick, ca. 1 cm long | Slender, 2–3.5 cm long | Short-thick, ca. 1 cm long |
Calyx colour | White | White to purplish | White, yellowish to dark purple | White | Pale yellow | Violet |
Calyx surface | Glabrous | Glabrous | Glabrous | Glabrous | Glabrous | Glabrousa |
Calyx lobes/teeth | 2–4 (–5) | 2–4 (–5) | (2–) 3 (–4) | (2–) 3–4 (–5) | 5 | (4–) 5 |
Enclosure of corolla tube by calyx (herbarium material) | About half | Less than half | Less than half | About half | Less than half, to half | About half |
Enclosure of corolla tube by calyx (fresh material) | About a quarter | A quarter to a third | A third to half | A quarter to a third | A quarter to a third | ? |
Corolla colour | White | White to tinged with violet | White tinged with violet | White | White | White with violet seams |
Corolla pubescence | Glabrous | Glabrous | Glabrous | Glabrous | Tube outer surface and both sides of lobes white-pubescent | Glabrous |
Corolla lobe & throat colour | White, with yellow-orange patch from base of lip down to inside the tube | White, with dark yellow patch from base of lip down to inside the tube | Bluish to violet, with yellow patch from base of lip down to inside the tube | White to slightly lilac, with yellow-orange patch from base of lip down to inside the tube | White to greyish or bluish, bright yellow patch on all lobes to down inside the tube | ? |
Hairs at point of attachment of anthers | Glabrous | Glabrous | Distinct hair tuft obstructing corolla throat | Glabrous | Sparse scattered short hairs on filaments | Glabrous |
Anther appendage, dorsal side | With short acute projection | With “projecting acute posterior process” (Prain 1904) | With short acute projection | With short acute projection | With a slender spur-like projection | Rounded, without acute projection |
Stigma | Peltate | Peltate | Peltate | Peltate | Bilobed | Bilobed |
Known distribution | N Borneo (Sabah) | Peninsular Malaysia, Thailand, Vietnamb | Thailand (N NE, SW), India (Nagaland) | SW and SE China | India, Pakistan | India |
Habitat | Montane sites over 2000 m | Montane sites ca. 650–1700 m | Mixed deciduous forest at 300–800 m | Montane forest, 1500–2000 m | Montane sites | Montane sites |