Pinguicula alpina | |
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In situ, Austria | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Lamiales |
Family: | Lentibulariaceae |
Genus: | Pinguicula |
Species: | P. alpina |
Binomial name | |
Pinguicula alpina L., 1753 | |
Pinguicula alpina, also known as the alpine butterwort, is a species of carnivorous plant native to high latitudes and altitudes throughout Eurasia. It is one of the most widespread Pinguicula species, being found in mountainous regions from Iceland to the Himalayas. Native to cold climates, it is a temperate species, forming prostrate rosettes of green to red leaves and white flowers in the summer and a tight hibernaculum during a period of winter dormancy in the winter. Like all members of the genus, P. alpina uses mucilaginous glands covering the surface of its summer leaves to attract, trap, and digest arthropod prey.
Pinguicula alpina is a small perennial herb, reaching a height of 5–15 cm (2–6 in) when in flower. The plant is supported by 1–2 cm (0.4–0.8 in) long roots, which are fleshy, yellow-white and branching. [1] P. alpina is the only temperate Pinguicula which retains these roots year-round; the roots of other temperate species wither with the winter dormancy. This allows it to invest more of its income (nutrients derived from prey) into long-term storage, compared to other subarctic Pinguicula which are income breeders and invest these nutrients into immediate plant size and flowering increases. [2]
The five to eight fleshy, light-green to reddish, elliptic to lanceolate leaves form a ground-hugging rosette up to 6 cm (2 in) in diameter. The upper surface of the leaves are sticky from the mucilage secreted by stalked glands covering the leaf surface. Small insects alighting upon this surface are caught by the mucilage, upon which sessile glands embedded in the leaf surface (except for the central vein) secrete digestive enzymes to digest the prey. The leaves of this species are able to further aid digestion by growing such that the leaf edge rolls toward the center, bringing additional glands into contact with the prey. Most plants are reddish-green in full sun, though some plant will turn completely red while a smaller percentage will remain completely green. [3]
Pinguicula alpina only begins flowering after several years of growth. Six to eight (occasionally up to 13) flowers are borne singly on unbranched inflorescences up to 12 cm (5 in) tall. The zygomorphic flowers are 10–16 mm (0.39–0.63 in) long with a short yellow-green spur and are composed of a two-lobed upper lip and three-lobed lower lip. They are white with one or sometimes three yellow markings on the lower lip. These can be variable in size and shape. The flowers are protogynous, meaning that the female stigmas mature before the male anthers, and are pollinated by flies.
Fertilized flowers mature into 6–9 mm (0.24–0.35 in) by 2–3 mm (0.079–0.118 in) seed capsules bearing copious numbers of tiny, rust-brown seeds.
Healthy plants produce 3 mm (0.12 in) bulblets at the leaf axils following the flowering period. These form new plants the following year, serving as a means of vegetative reproduction. Plants in arctic habitats do not form these bulblets.[ citation needed ]
Pinguicula alpina is hemicryptophytic, in that the plant survives the cold winter conditions by reducing to a bud resting on the soil surface. This bud, called a hibernaculum, is composed of small, densely packed leaves, which unfurl with the coming of spring. Although most hibernacula in this genus lose their roots during this period, P. alpina is unique in that it retains them.
Pinguicula alpina is found in high altitudes and latitudes throughout Europe and Asia, with the densest populations concentrated in the Alps and northern Scandinavia. Around the last ice age the plant was distributed throughout Asia, where it still remains today in Siberia, Mongolia, and the Himalayas. P. alpina is one of the most widely distributed members of the genus Pinguicula .
In 2012, a population of more than 1000 P. alpina individuals was discovered in Ringhorndalen, Svalbard. Previously unknown to exist in the archipelago, it now marks the northernmost population of the species. [4]
This species grows from sea level in northwest Siberia to altitudes of up to 4,100 m (13,500 ft) in open, sunny locations. The plant prefers wet soils such as seeps with alkali to neutral pH. P. alpina is, however, unusually tolerant of soil dryness for a temperate butterwort. It is typically found in subalpine seeps or bogs or alpine rock-meadows.
In alpine locations P. alpina is often found growing with Carex firma (an alpine grass), Bistorta officinalis , Dryas octopetala , and Pedicularis rostratocapitata . Here it most often grows in a Caricetum firmae plant association, part of the Seslerion albicantis (alpine bluegrass) plant community.
In montane locations it is most often associated with Caricion davallianae and Cratoneurion commutati plant communities, growing together with Schoenus nigricans , Schoenus ferrugineus , Epipactis palustris , Cochlearia officinalis and Pinguicula vulgaris .
Due to its widespread distribution, P. alpina enjoys a relatively secure future. In some regions in Europe, however, it is uncommon enough to be threatened by development or agriculture. The species, for example, used to be found in northern Scotland, but has since been eradicated there and is no longer found growing natively on the British Isles. The species is protected in Germany by the "Bundesartenschutzverordnung", and is also protected locally in some Swiss cantons and the Pannonian and Alpine foothill regions of Austria.
European folk medicine didn't distinguish between various butterwort species, but prescribed them for sores, swelling, sciatica, and liver disease, as well as stomach aches, chest pain and respiratory problems. Its supposed effectiveness against these ailments is attributed to the cinnamic acid found in the plants.
In 1583, Clusius distinguished between two butterwort forms in his Historia stirpium rariorum per Pannoniam, Austriam: a blue-flowered form ( P. vulgaris ) and a white-flowered form (P. alpina), which Linnaeus included in his Species Plantarum in 1753 along with P. villosa and P. lusitanica .
Since that time countless subgenera, varieties and forms have been described in an attempt to reassign or further delimitate the species. These, however, have not gained wide acceptance.
With the exception of the extremely rare P. crystallina , P. alpina is the only European species which is not a member of the section Pinguicula, belonging instead to the section Micranthus, of which it the type species. The other three species of this section are native to northern Russia, Siberia and Japan.
Although it is not closely related, P. alpina forms natural hybrids with P. vulgaris, forming the hybrid Pinguicula × hybrida.
Drosera, which is commonly known as the sundews, is one of the largest genera of carnivorous plants, with at least 194 species. These members of the family Droseraceae lure, capture, and digest insects using stalked mucilaginous glands covering their leaf surfaces. The insects are used to supplement the poor mineral nutrition of the soil in which the plants grow. Various species, which vary greatly in size and form, are native to every continent except Antarctica.
Lentibulariaceae is a family of carnivorous plants containing three genera: Genlisea, the corkscrew plants; Pinguicula, the butterworts; and Utricularia, the bladderworts.
Utricularia, commonly and collectively called the bladderworts, is a genus of carnivorous plants consisting of approximately 233 species. They occur in fresh water and wet soil as terrestrial or aquatic species across every continent except Antarctica. Utricularia are cultivated for their flowers, which are often compared with those of snapdragons and orchids, especially amongst carnivorous plant enthusiasts.
Drosera rotundifolia, the round-leaved sundew, roundleaf sundew, or common sundew, is a carnivorous species of flowering plant that grows in bogs, marshes and fens. One of the most widespread sundew species, it has a circumboreal distribution, being found in all of northern Europe, much of Siberia, large parts of northern North America, Korea and Japan but is also found as far south as California, Mississippi and Alabama in the United States of America and in New Guinea.
Pinguicula moranensis is a perennial rosette-forming insectivorous herb in the flowering plant family Lentibulariaceae. It is native to El Salvador, Guatemala, Honduras and Mexico. A species of butterwort, it forms summer rosettes of flat, succulent leaves up to 10 centimeters (4 in) long, which are covered in mucilaginous (sticky) glands that attract, trap, and digest arthropod prey. Nutrients derived from the prey are used to supplement the nutrient-poor substrate that the plant grows in. In the winter the plant forms a non-carnivorous rosette of small, fleshy leaves that conserves energy while food and moisture supplies are low. Single pink, purple, or violet flowers appear twice a year on upright stalks up to 25 centimeters long.
Pinguicula primuliflora, commonly known as the southern butterwort or primrose butterwort, is a species of carnivorous plant belonging to the genus Pinguicula. It is native to the southeastern United States. The typical variety forms a white flower in blooming. Like other butterworts, it has sticky adhesive leaves which attract, capture and digest arthropod prey in order to supply the plant with nutrients such as nitrogen not found in the nutrient poor, acidic soil that it grows in. Its name derives from the fact it is usually the first one to flower in the spring.
Pinguicula gigantea is a tropical species of carnivorous plant in the family Lentibulariaceae. Its native range is within Mexico. P. gigantea's flower is usually a purple colour with the occasional light blue also seen. P. gigantea was once classified as Pinguicula ayautla.
Pinguicula vulgaris, the common butterwort, is a perennial carnivorous plant in the bladderwort family, Lentibulariaceae.
Pinguicula longifolia, commonly known as the long-leaved butterwort, is a perennial carnivorous subalpine plant of the Central Pyrenees, found on both sides of the border. It catches its prey by using its modified leaves that lie on the ground and have “densely covered stalked glands that bear a droplet of sticky mucilage on its top.” The need to capture arthropods is driven by the lack of nutrients present in the soil. P. l. subsp. longifolia obtain their nutrition primarily from flying insects, mainly diptera, which replenished the carnivorous plant with nitrogen. P. l. subsp. longifolia grows in wet shady areas and on vertical or overhanging limestone walls. It has been found at altitudes between 700 – 1900 meters. In the spring, the winter buds open and the first carnivorous leaves present themselves. These leaves are then followed by the flowers in early summer. Throughout summer the leaves can grow up to 14 cm in length and have glands present on both sides of the leaves, which is highly characteristic of P. l. subsp. longifolia. More carnivorous leaves arise throughout summer, and when the conditions become unfavourable, around autumn, a protective winter casing composed of scale like leaves is produced, in the centre of the rosette, called the hibernacula, also known as the plant bud. The leaves halt production and the old leaves wither and decay; P. l. subsp. longifolia is now ready for the winter dormancy. There must be optimal growth during the summer for P. l. subsp. longifolia, otherwise they produce weakened hibernacula which rot very easily.
Mucilage is a thick gluey substance produced by nearly all plants and some microorganisms. These microorganisms include protists which use it for their locomotion. The direction of their movement is always opposite to that of the secretion of mucilage. It is a polar glycoprotein and an exopolysaccharide. Mucilage in plants plays a role in the storage of water and food, seed germination, and thickening membranes. Cacti and flax seeds are especially rich sources of mucilage.
Carnivorous plants are plants that derive some or most of their nutrients from trapping and consuming animals or protozoans, typically insects and other arthropods, and occasionally small mammals and birds. They still generate all of their energy from photosynthesis. They have adapted to grow in waterlogged sunny places where the soil is thin or poor in nutrients, especially nitrogen, such as acidic bogs. They can be found on all continents except Antarctica, as well as many Pacific islands. In 1875, Charles Darwin published Insectivorous Plants, the first treatise to recognize the significance of carnivory in plants, describing years of painstaking research.
Pinguicula orchidioides is a perennial rosette-forming insectivorous herb native to Mexico and Guatemala. A species of butterwort, it forms summer rosettes of flat, succulent leaves up to 5 centimeters (2 in) long, which are covered in mucilaginous (sticky) glands that attract, trap, and digest arthropod prey. Nutrients derived from the prey are used to supplement the nutrient-poor substrate that the plant grows in. Uniquely among Pinguicula species from the Americas, p. orchidioides produces gemma-like basal buds which elongate into stolons and serve as a means of asexual reproduction. In the winter the plant forms a non-carnivorous rosette of small, fleshy leaves that conserves energy while food and moisture supplies are low. Single purple flowers appear between July and September on upright stalks up to 22 centimeters long.
Pinguicula elizabethiae is a perennial rosette-forming insectivorous herb native to the Mexican states of Querétaro and Hidalgo. A species of butterwort, it forms summer rosettes of flat, succulent leaves up to 5 centimeters (4 in) long, which are covered in mucilaginous (sticky) glands that attract, trap, and digest arthropod prey. Nutrients derived from the prey are used to supplement the nutrient-poor substrate that the plant grows in. In the winter the plant forms a non-carnivorous rosette of small, fleshy leaves that conserves energy while food and moisture supplies are low. Single purple flowers appear between July and October on upright stalks up to 75 millimeters long.
Pinguicula, commonly known as butterworts, is a genus of carnivorous flowering plants in the family Lentibulariaceae. They use sticky, glandular leaves to lure, trap, and digest insects in order to supplement the poor mineral nutrition they obtain from the environment. Of the roughly 80 currently known species, 13 are native to Europe, 9 to North America, and some to northern Asia. The largest number of species is in South and Central America.
Pinguicula lutea, commonly known as the yellow butterwort, is a species of warm-temperate carnivorous plant in the family Lentibulariaceae. It grows in savannas and sandy bog areas of the Southeastern United States.
Pinguicula filifolia, is a carnivorous species of plant found predominantly in western Cuba and some of the neighboring regions. It was discovered by Charles Wright in 1866. It is a tropical plant that uses sticky secretions on its leaves to catch small insects, pollen, and other plant debris to help supplement its own nutrition. It thrives in swamp like white sand savannahs with high temperatures and humidity.
Pinguicula macroceras, the California butterwort or horned butterwort, is a species of perennial carnivorous herb that is native to the North American Pacific coast, as well as other select distributions in Canada, Russia, Japan, and the United States.[3] [7] Common names include California butterwort, horned butterwort and butterwort. Pinguicula macroceras belongs to the genus Pinguicula and the family Lentibulariaceae.
Pinguicula pumila, commonly known as the small butterwort or dwarf butterwort is a small species of carnivorous plant in the genus Pinguicula. It is native to the southeastern United States, where it grows in habitats where soil is poor in nutrition.
Pinguicula hemiepiphytica is a tropical carnivorous plant species native to the cloud forests of Oaxaca, Mexico. It was first identified in 1991 and is one of the few epiphytic species in the genus.
Much of the content of this article comes from the equivalent German-language Wikipedia article (retrieved on 7 February 2007).