Small trees or shrubs, sometimes scrambling or climbing. Stipules lateral. Leaves petiolate, alternate, simple, serrate or rarely entire, 3-7-veined from the base. Flowers in terminal or axillary panicles or in leaf-opposed or axillary umbel-like cymes. Sepals 5, stellately hairy, coloured inside like the petals. Petals 5, most often yellow, less often white and rarely purple (Grewia occidentalis), usually with a nectar-bearing claw or gland at the base. Stamens numerous. Ovary 2-4-locular. Fruit indehiscent, without bristles, a (1-)2-4-lobed drupe with (1-)2-4 pyrenes. Derivation of name: for Nehemiah Grew (1641-1712), British botanist and physiologist. Worldwide: 150 species in warm parts of the Old World. Botswana: 18 taxa. Insects associated with this genus:
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| Species | FZ divisions | Content |
| afra Meisn. | Description, Image | |
| avellana Hiern | N,SW,SE | Description, Image |
| bicolor Juss. | N,SE | Description, Image |
| cyclopetala Wawra | ||
| falcistipula K.Schum. | ||
| flava DC. | N,SW,SE | Description, Image |
| flavescens Juss. var. flavescens | N,SW,SE | Description, Image |
| hexamita Burret | Description, Image | |
| inaequilatera Garcke | Description, Image | |
| monticola Sond. | N,SE | Description, Image |
| olukondae Schinz | N,SE | Description, Image |
| pachycalyx K. Schum. | N | Description, Image |
| praecox K. Schum. | ||
| retinervis Burret | N,SE | Description, Image |
| schinzii K. Schum. | N | |
| subspathulata N.E. Br. | N,SE | |
| tenax (Forssk.) Fiori | Description, Image | |
| villosa Willd. | N | Description, Image |