St. John's worts
Botanical name: Hypericum
St. John's worts
Botanical name: Hypericum
Description
St. John's worts are a diverse group of flowering plants, and all of these species are commonly referred to by the genus's common name. Many species in this group are considered noxious weeds or invasive. They are named after the 16th-century martyr St. John because of the red secretions that are exuded when the plants are crushed or damaged.
Species of St. John's worts
Cedarglade St. John's wort
It is a medium-sized shrub, growing 61 to 305 cm in height with a highly-branching form. The stems are green when young, becoming reddish brown and peeling or plating with age. The opposite leaves are sessile, up to 7 cm long and 2 cm across with an oblong to lanceolate shape.
Alpine St. John's wort
Richers johanniskraut is a perennial plant that reaches heights of growth of 10 to 60 centimeters. Its creeping, feathered basic axis lumbers. There are several arched ascending, two-edged stems. The seated, cross-leaves are up to 14 cm long, pointed-ovate and occupied at the edge of the underside with black, seated glands.
Mount olympus St. John's wort 'Sulphureum'
This cultivar is unique in its leaves and flower color, which inspires the name Sulphureum. The mount olympus St. John's wort 'Sulphureum' is one of two major cultivars from Hypericum olympicum 'Sulphureum', and is actually the lesser known of the two. In this form, its leaves are shaped like lances. It is popular for its beautiful and bright appearance.
St. John's worts 'Hidcote'
A hybrid cultivar of St. John's wort, st. John's worts 'Hidcote' is a large bush that boasts masses of bright, golden-yellow, buttercup-like flowers during summer. This cultivar is one of the most popular and most reliable St. John wort cultivars, noted for its long-lasting display. It was bred in, and named after the famous Hidcote Manor Garden located in Gloucestershire, UK.
Matted St. John's-wort
Matted St. John's-wort (Hypericum japonicum) is a widespread wildflower that occurs in a large variety of mainly damp tropical habitats from rice fields to grasslands. While it isn't a common ornamental species, its dense and compact growth forms make it a good candidate for ground cover. Its small yellow flowers offer up to six months of garden interest.
Forrest St Johns wort
It is a semi-evergreen shrub growing to 1.2 m tall by 1.5 m broad. It has oval leaves which turn red in autumn and bowl-shaped yellow flowers with prominent stamens in late summer.
Bedstraw St. John's wort
It is a slender, branching shrublet up to 1.5 m tall with linear to oblanceolate leaves. The sessile leaves are 15 to 37 cm long and 1 to 7 mm across with mostly acute tips. The flowers are small, in terminal and axillary cymes, with very narrow sepals. Each flower is 9 to 14 mm in diameter with 5 bright yellow petals and 60–120 stamens.
Pyramidal St. John's wort
Pyramidal St. John's wort (Hypericum triquetrifolium) is named because the flowering shrub blooms in late summer coinciding with the feast of St. John the Baptist in summer. Its yellow flowers form in clusters of five with many long dainty stamens resembling yellow firework.
Cedarglade St. John's wort 'Sunburst'
This perennial cultivar of St. John’s wort is known for its blue-green leaves and yellow flowers. The flowers have a unique appearance with a poofy ball-like center that is surrounded by buttercup-shaped petals. Cedarglade St. John's wort 'Sunburst' is often used as a shrub or hedge and can serve as an ornamental plant in garden beds.
Hairy St John's-wort
Unlike other species of St. John's wort, the hairy St John's-wort grows in well-drained soil rather than bogs. It's also the only species with hairy leaves (thus the name). It can grow up to 91 cm tall. Hairy St John's-wort is particularly common in the British Isles.
Nepal St Johns wort
nepal St Johns wort is grown ornamentally for its interesting pointed leaves and its large and showy yellow flowers. This shrub thrives in conditions of full or partial sunlight that reflect its native thickets, woodlands, and pasture habitats.
Imperforate St. John's wort
Imperforate St. John's wort is a herb that grows in damp meadows, pastures, and disturbed ground. It is distinguishable from other, similar species of its genus by its stem, which has four edges, and the rounded tips of its sepals. This herbaceous perennial flowers in late summer.
St. John's worts 'Magical Pumpkin'
St. John's worts 'Magical Pumpkin' is best known for its blooms, with surges of yellow petals erupting from beautiful pink buds. Its name comes from the captivating orange berries it produces in the fall. This shrub is part of the First Editions Series of Hypericum, which have been bred to produce excellent cut flowers.
Great St. John's wort
Great St. John's wort (Hypericum ascyron) is a tall perennial native to Northeastern and Midwestern North America and Eastern Asia. It produces magnificent golden yellow flowers. This easy-growing shrub thrives in marshes, river banks, and fields under full sun to moderate shade.
Orangegrass
Hypericum gentianoides is a plant in the St. John's wort family that's commonly called orangegrass because of its yellow and orange colors. The plant is native to eastern North America and mostly grows in upland regions and sandy soils.
St. John's Wort
The Hypericum × inodorum grows to be 2 m tall. It has a branching base with gray-brown bark. Its leaves give off a goat-like scent when crushed (caproic acid).
Chinese St John's wort
Chinese St John's wort (Hypericum monogynum) is a semi-evergreen flowering shrub that grows best in moist, well-drained soil in sunny locations. Chinese St John's wort grows along borders and along garden walls. This species is normally free of pests and disease.
Shrubby St. John's wort
Shrubby St. John's wort (*Hypericum prolificum*) is a flowering shrub native to the eastern United States and Canada. It grows in woodlands, swamps, and near rivers and streams. This plant is known for the numerous pollen-producing organs its flowers contain.
St. John's worts 'Red Fame'
The st. John's worts 'Red Fame' offers visual interest with yellow flowers and bright red berries that inspire its name. It was bred for rust resistance and is both drought- and disease-resistant. The St. John's wort cultivar is low maintenance and can be grown in borders, slopes, and as a hedge.
St. John's worts 'Rowallane'
Bearing bowl-shaped, deep-yellow flowers, St. John's worts 'Rowallane', named for the garden in which it was discovered, is an ideal ground cover for cottage and informal gardens. St. John's worts 'Rowallane', a hybrid of Hypericum leschenaultii and H. hookerianum "Charles Rogers," continues to delight during its flowering season from early to late summer.
St. John's worts 'Magical Universe'
St. John's worts 'Magical Universe' is a hypericum or St John’s Wort cultivar. This cultivar is part of the ‘Magical’ series, all of which have bright berry and flower color combinations. The foliage is aromatic and turns from blue-green to red and orange in the fall.
Rose of sharon 'Golden Rule'
Unlike other varieties of St. John’s Wort, rose of sharon 'Golden Rule' is a less aggressive but hardy ground-covering shrub known for its color-changing foliage. The leaves start out orange-yellow, then fade to green (hence the name). It also produces bright yellow flowers in the summer that attract pollinators. Many gardeners use it in difficult areas.
St. John's worts 'Tricolor'
Where the parent plants, H. calycinum and H. patulum, have plain green leaves, st. John's worts 'Tricolor' has variegated green, yellow, and pink leaves, which explains the name 'tricolor'. Add attractive golden-yellow flowers and you'll see why this shrub is a highly sought-after garden specimen, perfect for containers, patios, and beds.
St. Peter's wort
St. Peter's wort (Hypericum crux-andreae) is a species that's indigenous to eastern North America. The most common place you'll find this tiny shrub is anywhere the soil's moist and sandy. That's why you'll find this species flourishing in such environments as muddy bogs, humus-rich streambanks, and freshwater marshes.
Canary island St. John's wort
Also known as canary island St. John's wort, this plant has vibrant yellow flowers and glossy green leaves. Avoid grazing animals as it can be toxic to them.
Creeping St. John's wort
The creeping St. John's wort (Hypericum calycinum) is a low, creeping, woody shrub commonly found on steep European slopes. The common name has roots in biblical texts, but has historically been applied to several different species; this particular species is likely not the same as the creeping St. John's wort mentioned in the bible.
Slender St. John's wort
The slender St. John's wort has heart-shaped leaves and grows throughout Britain. When the glands on the plant are crushed, a compound within creates red stains. In the sixteenth century, these red stains were linked to the martyrs - and St. John in particular - which led to the English and German common name of the plant.
Spotted St. John's wort
Spotted St. John's wort (Hypericum punctatum) is a plant species that is native to the American midwest and Canada. This species grows in floodplains, roadsides, moist fields, and thickets. Its common name comes from medieval European celebrations of a feast day honoring the Catholic Saint John.
Dwarf St. John's wort
Common to parts of North America, dwarf St. John's wort or Hypericum mutilum, is an annual and perennial herb. Seeds of the dwarf St. John's wort are distributed by wading birds that feed in its moist, muddy habitat.
Goldencup St. John's wort
The goldencup St. John's wort (Hypericum patulum) is cultivated as an ornamental shrub because of its showy yellow flowers. The goldencup St. John's wort is native to China but is now found in many places around the world, typically at high altitudes.
Nits and lice
Nits and lice(Hypericum drummondii) is a flowering plant that's usually found in dry, gravelly soils in fields, dry woods, and coastal prairies. The species belongs to a very diverse genus and it was named after the Scottish-born American naturalist Thomas Drummond.
Upright st. John's wort
It grows up to 20 to 60 cm in height and blooms about 2 cm yellow flowers in summer. A brown oil spot is seen on the surface of the leaf, which is a photoactive substance called hypericin, and when it is exposed to sunlight, it causes dermatitis and edema.
Common St. John's wort
Common St. John's wort (*Hypericum perforatum*) is a plant species that is native to Europe and Central Asia. Common St. John's wort is considered poisonous to livestock and can cause problems for humans if consumed. This dense, fast-growing plant has been introduced to North America and Australia, where it is often viewed as an invasive species.
St. Andrew's cross
St. Andrew's cross (Hypericum hypericoides) is a small evergreen perennial shrub. It gets its name from its yellow flowers, which have four petals in the shape of a cross. St. Andrew, who was the patron saint of Scotland, was said to have been martyred on a cross. The bark and stems have a reddish color.
Tutsan
Tutsan (Hypericum androsaemum) is related to the more common St. John's Wort. It is native to Europe, Iran, and the Mediterranean region. This fast-growing plant is considered invasive in some countries - particularly in Australia where neither livestock nor any wild animals will eat it.
Azorean St. John's wort
Azorean St. John's wort are a diverse group of flowering plants, and all of these species are commonly referred to by the genus's common name. Many species in this group are considered noxious weeds or invasive. They are named after the 16th-century martyr St. John because of the red secretions that are exuded when the plants are crushed or damaged.
Scientific Classification
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