| Common Name: | St. John's-wort |
| Family: | Hypericaceae |
| Genus: | Hypericum |
| Species: | perforatum |
| Classification/Rank: | Aggressive or Under Bio-control |
| Method of Transportation: | |
| Habitat/Range: | • a companion with common tansy in the Terrace area. • prevalent along Hwy 16 from the Skeena River Bridge west to the A&W in Terrace. • moving east and small infestations are appearing along Hwy 16 through to the eastern edge of the region. • moving north towards the region along the CN rail line and Hwys 5 and 97. • not thought to present a serious threat due to successful biological control |
• perennial herb from a rhizome; grows 0.1 to 1.0 m tall
• stems erect, much branched above, smooth
• stem leaves lance-shaped, unstalked, obtuse, smooth with translucent glandular dots throughout and black marginal dots
• flowers are yellow; occur as an inflorescence of over 100 flowers
This will be of interest to those writing pest management plans or who work in the vegetation management field. Check out IVMA's website...
