Square-stemmed St John's Wort
Taken at Strathclyde Park on 14th August 2024 using Nikon Coolpix P950
Fact File


Taken at Baron's Haugh 28th June 2018 using Nikon D5200 with Sigma 600 mm zoom lens.
Fact File
Square-stemmed St John's Wort.
Species:
Order:
Family:
Habit:
AKA: 		Hypericum tetrapterum.
Malpighiales.
Hypericaceae.
Perennial
Habitat:
Blooms:
Height:
Feature:
 Damp places, marshes, pond and river margins.
June - September.
30 - 60 cms.
St. John's-worts can occur as nuisance weeds in farmland and gardens. On pastures, some can be more than a nuisance, causing debilitating photosensitivity and sometimes abortion in livestock.