Henry Halcro Johnston
| Birth name | Henry Halcro Johnston | ||||||||||||||||||||||||||||||||||||||||||||
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| Date of birth | 13 September 1856 | ||||||||||||||||||||||||||||||||||||||||||||
| Place of birth | Orphir House, Orphir, Orkney, Scotland | ||||||||||||||||||||||||||||||||||||||||||||
| Date of death | 18 October 1939 (aged 83) | ||||||||||||||||||||||||||||||||||||||||||||
| Place of death | Orphir, Orkney, Scotland | ||||||||||||||||||||||||||||||||||||||||||||
| School | Dollar Academy Edinburgh Collegiate School | ||||||||||||||||||||||||||||||||||||||||||||
| University | Edinburgh University | ||||||||||||||||||||||||||||||||||||||||||||
| Rugby union career | |||||||||||||||||||||||||||||||||||||||||||||
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Colonel Henry Halcro Johnston CB CBE DL FRSE FLS (13 September 1856 – 18 October 1939) was a Scottish botanist, physician, rugby union international and Deputy Lieutenant for Orkney. As a member of Edinburgh University RFC he represented Scotland in 1877 and went on to make a significant contribution to botany and horticulture through his meticulous collection and recording of plant species during and after his distinguished military career.