The following is a list of the records made by Johnstone in species name order.
Click on a column heading to sort the entries in that column
| No | Species | Record date | Recorder(s) | Coll. | Det. | Conf. | Herbaria | Habitat | Location | Loc code(s) | Outing code | Planted code | Country | QDS | Grid ref. | FZ Div | Alt. (m) | Notes | Lat | Long | Loc Acc Code |
| 16066 | Ipomoea turbinata | 7 Apr 1952 | Johnstone |
Johnstone s.n. | SRGH K |
Shangani, Lupane, cultivated in Harare | 0 | Zimbabwe | W | 0.000000 | 0.000000 | 0 |