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Dipsacus

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Dipsacus is a genus of flowering plant in the family Caprifoliaceae. The members of this genus are known as teasel. The genus includes about 15 species of tall herbaceousbiennial plants (rarely short-lived perennial plants) growing to 1–2.5 metres (3.3–8.2 ft) tall. Dipsacus species are native to Europe, Asia and Africa. EtymologyThe genus name (Dipsacus) is derived from the Greek word for thirst (dipsa) and refers to the cup-like formation made where sessile leaves merge at the stem.

InflorescenceInflorescenceIn botany, an inflorescence is a group or cluster of flowers arranged on a plant's stem that is composed of a main branch or a system of branches. An inflorescence is categorized on the basis of the arrangement of flowers on a main axis (peduncle) and by the timing of its flowering (determinate and indeterminate). Morphologically, an inflorescence is the modified part of the shoot of seed plants where flowers are formed on the axis of a plant.Flowering plantFlowering plantClade of seed plants that produce flowersFlowering plants are plants that bear flowers and fruits, and form the cladeAngiospermae () or Magnoliophyta. The term angiosperm is derived from the Greek words ἀγγεῖον (angeion: 'container, vessel') and σπέρμα (sperma; 'seed'), meaning that the seeds are enclosed within a fruit.FlowerFlowerFlowers, also known as blossoms and blooms, are the reproductive structures of flowering plants. Typically, they are structured in four circular levels around the end of a stalk. These include: sepals, which are modified leaves that support the flower; petals, often designed to attract pollinators; male stamens, where pollen is presented; and female gynoecia, where pollen is received and its movement is facilitated to the egg.BractBractIn botany, a bract is a modified or specialized leaf, associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves in size, color, shape or texture. They also look different from the parts of the flower, such as the petals or sepals. A plant having bracts is referred to as bracteate or bracteolate, while one that lacks them is referred to as ebracteate or ebracteolate.CaprifoliaceaeCaprifoliaceaeThe Caprifoliaceae or honeysuckle family is a clade of dicotyledonous flowering plants consisting of about 860 species in 33 to 42 genera, with a nearly cosmopolitan distribution. Centres of diversity are found in eastern North America and eastern Asia, while they are absent in tropical and southern Africa.Sessility (botany)Sessility (botany)In botany, sessility (meaning "sitting", in the sense of "resting on the surface") is a characteristic of plant organs such as flowers or leaves that have no stalk. Plant parts can also be described as subsessile, that is, not completely sessile. A sessile flower is one that lacks a pedicel (flower stalk). A flower that is not sessile is pedicellate. For example, the genus Trillium is partitioned into multiple subgenera, the sessile-flowered trilliums (Trillium subgen.SeedSeedIn botany, a seed is a plant structure containing an embryo and stored nutrients in a protective coat called a testa. More generally, the term seed means anything that can be sown, which may include seed and husk or tuber. Seeds are the product of the ripened ovule, after the embryo sac is fertilized by sperm from pollen, forming a zygote. The embryo within a seed develops from the zygote and grows within the mother plant to a certain size before growth is halted.Biennial plantBiennial plantA biennial plant (bi- + -ennial, two-year) is a flowering plant that, generally in a temperate climate, takes two years to complete its biological life cycle. BackgroundIn its first year, the biennial plant undergoes primary growth, during which its vegetative structures (leaves, stems, and roots) develop. Usually, the stem of the plant remains short and the leaves are low to the ground, forming a rosette.GenusGenusGenus (; pl.: genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. E.g. Panthera leo (lion) and Panthera onca (jaguar) are two species within the genus Panthera. Panthera is a genus within the family Felidae.AfricaAfricaContinentAfrica is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km (11.7 million square miles) including adjacent islands, it covers around 20% of Earth's land area and 6% of its total surface area. With nearly 1.4 billion of the world population, Africa's population is the youngest among the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4.EuropeEuropeEurope is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east. Europe shares the landmass of Eurasia with Asia, and of Afro-Eurasia with both Africa and Asia.AsiaAsiaContinentAsia ( , UK also ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of many of the first civilisations. Its 4.7 billion people constitute roughly 60% of the world's population.PerennialPerennialIn botany, perennial (per- + -ennial, "through the year") is a plant that lives more than 2 years. Perennials contrast with shorter-lived annuals and biennials. The term is also loosely used to distinguish plants with little or no woody growth (secondary growth in girth) from trees and shrubs, which are also technically perennials. An estimated 94% of plant species are perennials.

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