Heterostemma grandiflorum Costantin
Apocynaceae
| Collection Number | D. Boufford 44180 |
| Collectors | David E. Boufford, Sharon Christoph, Chris Davidson, Xin-Han HUANG & Zhuo ZHOU |
| Identified By | D. Boufford (GH) |
| Source | C. Davidson |
| Date | 07 May 2018 |
| Country | China |
| province/SAR | Yunnan |
| prefecture-level | Jinghong. |
| Location | Xishuangbanna Daizuzi-Zhizhou; NW of Menglun-zhen between Menglun-zhen and Jingzu-Xiang on route G213 along a tributary of the Nanban Jiang (Nanban River). Mixed broadleaved evergreen and deciduous forest with Fagaceae and Lauraceae common on steep, unaltered slopes, also Duabanga common along main stream; most of forest on accessible slopes converted to rubber plantations. 830-920 m. elev. |
| Lat/Long | N 21 58 15 E 101 11 42 |
| Note | Climbing on shrubs in thicket on slope above stream; in open and in sunlight for most of day. Vine, ca. 7 m long; broken stem and leaves with copious milk-like sap; calyx green; petals dark brownish yellow, center portion dark purple. |