Common hemp-nettle | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Lamiales |
Family: | Lamiaceae |
Genus: | Galeopsis |
Species: | G. tetrahit |
Binomial name | |
Galeopsis tetrahit | |
Galeopsis tetrahit, the common hemp-nettle or brittlestem hempnettle, is a flowering plant in the family Lamiaceae, native to Europe and northwestern Asia.
It is a herbaceous annual plant growing to 1 m tall; it is a pioneer species and thrives on disturbed sites or roadsides. The plant looks like mint but is taller. The stems have reflexed hairs and swollen nodes. In cross section, the stem is square. The leaves are rhombic to elliptic, with coarsely to bluntly serrate edges. The flowers are multicoloured, with purple, pink, or white areas; [1] diminutive, bilateral and snapdragon-like, and are mostly visited by bumblebees. [2]
The species is considered by some authorities to have arisen as a natural hybrid between Galeopsis pubescens and Galeopsis speciosa .
Common hemp-nettle is an erect annual plant and grows to a height of about 20 to 70 cm (8 to 28 in). The stem branches occasionally and is squarish and hairy, with glandular hairs on the upper part of the plant. The nodes are swollen and widely spaced and the pale green, stalked leaves are in opposite pairs. The leaf blades are hairy and are ovate with a long tapered tip and with regular large teeth on the margin. The inflorescence forms a terminal spike and is composed of whorls of pinkish flowers with dark markings on the lower lip. The calyx has five sharp-pointed lobes and the corolla forms a two-lipped flower about 15 to 20 mm (0.6 to 0.8 in) long with a fused tube. The upper lip of each flower is convex with dense, glandular hairs and the lower lip is three-lobed, the central lobe being the largest, squarish with a flat or rounded edge. There are four stamens, two long and two short, the gynoecium has two fused carpels and the fruit is a four-chambered schizocarp. The plant has a slightly unpleasant smell. [3]
Common hemp-nettle is native to Europe and northwestern Asia. Its typical habitat is rough ground, arable land, logging clearances and waste places. It spreads readily as its sharp calyces adhere to clothing and animal pelts. [3]
Leonurus cardiaca, known as motherwort, is an herbaceous perennial plant in the mint family, Lamiaceae. Other common names include throw-wort, lion's ear, and lion's tail. Lion's tail is also a common name for Leonotis leonurus, and lion's ear, a common name for Leonotis nepetifolia. Originally from Central Asia and southeastern Europe, it is now found worldwide, spread largely due to its use as a herbal remedy.
Lamium amplexicaule, commonly known as common henbit, or greater henbit, is a species of Lamium native to Europe, Asia and northern Africa.
Stachys sylvatica, commonly known as hedge woundwort, whitespot, or sometimes as hedge nettle, is a perennial herbaceous plant growing to 80 cm (31 in) tall in woodland and unmanaged grassland. In temperate zones of the northern hemisphere it flowers in July and August. The flowers are purple. The leaves, when crushed or bruised, give off an unpleasant fetid smell.
Epilobium hirsutum is a flowering plant belonging to the willowherb genus Epilobium in the family Onagraceae. It is commonly known as the great willowherb, great hairy willowherb or hairy willowherb. Local names include codlins-and-cream, apple-pie and cherry-pie.
Collinsia childii is a species of flowering plant in the plantain family known by the common name Child's blue-eyed Mary.
Collinsia greenei is a species of flowering plant in the plantain family known by the common name Greene's blue-eyed Mary.
Collinsia linearis is a species of flowering plant in the plantain family known by the common name narrowleaf blue-eyed Mary.
Collinsia rattanii is a species of flowering plant in the plantain family known by the common name sticky blue-eyed Mary. It is native to the coniferous forests of the Pacific Northwest of the United States from Washington to northern California. It is an annual herb growing up to 40 centimeters tall with linear leaves rolled under along the edges. The leaves are hairy on the upper surface and hairless and purple-tinted underneath. The inflorescence is coated in sticky glandular hairs. It has a series of nodes from which arise one to five flowers each on pedicels. The flower is only 4 to 8 millimeters long, with two mostly white upper lobes and three mostly purple lower lobes.
Galeopsis bifida is an annual plant native to Europe and Asia but now found in Canada and the northeastern, midwestern parts of the United States. It has many common names such as bifid hemp-nettle, split-lip hemp-nettle, common hemp-nettle, and large-flowered hemp-nettle. The genus name means weasel-like, referring to the corolla of the flower. It is often confused with other species of Lamiaceae such as Mentha arvensis, Dracocephalum parviflorum and Stachys pilosa.
Salvia greatae is a species of flowering plant in the mint family, Lamiaceae. Its common names include Orocopia sage and lavender sage.
Silene bernardina is a species of flowering plant in the family Caryophyllaceae known by the common name Palmer's catchfly.
Silene bridgesii is a species of flowering plant in the family Caryophyllaceae known by the common name Bridges' catchfly.
Silene lemmonii is a species of flowering plant in the family Caryophyllaceae known by the common name Lemmon's catchfly.
Silene menziesii is a species of flowering plant in the family Caryophyllaceae known by the common names Menzies' campion and Menzies' catchfly. It is native to western North America from Alaska through the western half of Canada to the southwestern United States. It can be found in many types of habitat and it is quite common in much of its range. It is variable in morphology and there are a number of varied subtaxa. In general, it is a perennial herb growing from a caudex, appearing matlike, decumbent, or erect, with stems a few centimeters to over half a meter long. It is usually hairy in texture, with upper parts bearing sticky glandular hairs. The leaves are lance-shaped, oppositely arranged in pairs, and a few centimeters in length, upper leaves usually smaller than lower. Flowers may occur in a cyme at the top of the stem, or in leaf axils, or both. Each is encapsulated in a hairy, veined calyx of fused sepals. The petals are white with two lobes at the tips. The plant is dioecious with male and female plants producing different flowers. The male and female flower types look the same externally; the stamens are reduced in female plants and the stigmas are reduced in the male.
Silene suksdorfii is a species of flowering plant in the family Caryophyllaceae known by the common names Suksdorf's silene, Suksdorf's catchfly and Cascade alpine campion. It is native to the Pacific Northwest of the United States, where it occurs from Washington and Idaho to northern California. It is mainly an alpine species, growing in the talus of high mountain slopes. It can also be found below the tree line in forested subalpine habitat. It is a squat perennial herb producing several erect stems from a leafy, woody caudex. It generally takes a clumpy form. The stems grow up to 10 or 15 centimeters tall and are hairy in texture, with glandular, sticky areas on the upper parts. The leaves occur in tufts around the caudex. They are fleshy and coated in soft hairs. Solitary flowers arise on erect peduncles. Each is encapsulated in an inflated calyx of fused sepals, which is starkly purple-veined and has purplish glandular hairs. The petals are white or purple-tinged and have two lobes at their tips and appendages at their bases.
Stemodia durantifolia is a species of flowering plant in the plantain family commonly known as the whitewoolly twintip and purple stemodia. Stemodia durantifolia is native to the Americas, including Chile, Mexico, Texas, and the deserts of California and Arizona, and is often found in riparian habitats, preferring wet sand and rocks. It is a perennial herb producing a hairy, glandular, erect stem 10–100 cm (3.9–39.4 in) tall, with the toothed lance-shaped leaves found in pairs or triplets, attached to the stem with clasping bases. The inflorescence is a raceme of violet flowers, with each corolla held in a calyx of hairy, pointed sepals, and can often be found in bloom year-round. Although globally at low risk of extinction, Stemodia durantifolia is imperiled in California due to its rarity and threats from development.
Galeopsis is a genus of annual herbaceous plants native to Europe and Asia. Members of this genus often have common names ending in hemp-nettle or hempnettle. Some species are naturalized in North America and New Zealand.
Thymus pulegioides, common names broad-leaved thyme or lemon thyme, is a species of flowering plant in the family Lamiaceae, native to Europe. Growing to 5–25 cm (2–10 in) tall by 25 cm (10 in) wide, it is a small spreading subshrub with strongly aromatic leaves, and lilac pink flowers in early summer. The specific epithet pulegioides highlights its similarity to another species within Lamiaceae, Mentha pulegium (pennyroyal).
Pityrodia ternifolia is a species of flowering plant in the mint family, Lamiaceae and is endemic to north-western Australia. It is an erect shrub with densely hairy stems, sticky and prickly, egg-shaped leaves, and mauve or pinkish-red, tube-shaped flowers.
Galeopsis pubescens, also known as the hairy and downy hempnettle, is a herbaceous annual plant species in the family Lamiaceae, that can be found growing in various European countries.