Hoya soidaoensis

Kidyoo, Manit, 2013, Hoya soidaoensis (Apocynaceae: Asclepiadoideae), a new species from southeastern Thailand, Phytotaxa 105 (2), pp. 45-50 : 49

Key to Hoya soidaoensis and closely related species based on vegetative characters

1. Leaves ca. 4.1–7.1 × 8.5–15.5 cm, ovate, base rounded to cordate, margin strongly wrinkled, adaxial surface dark green with white blotches all over ............................................................................................................... H. caudata

- Leaves smaller, elliptic, ovate or lanceolate, base cuneate to acute, margin entire to slightly wrinkled, adaxial surface green, with or without small white blotches ................................................................................................................ 2

2. Leaves ovate to lanceolate, margin slightly wrinkled and revolute ........................................................... H. flagellata

- Leaves elliptic, margin entire, not revolute ........................................................................................... H. soidaoensis