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Home > Acanthaceae

The Family Acanthaceae Juss. (Acanthus family) is a taxon of dicotyledonous flowering plants containing some 234-250 genera and about 2500 species. Most are tropical herbs, shrubs, or twining vines; some are spiny. Only a few species are distributed in temperateIn geography, temperate latitudes of the globe lie between the tropics and the polar circles. The north temperate zone extends from the Tropic of Cancer at about 23. 5 degrees north latitude to the Arctic Circle at about 66. 5 degrees north latitude. regions.

Plants in this family have simple, opposite, decussate leavesThis article is about the leaf a plant organ. See Leaf (disambiguation) for other meanings. In botany, a leaf is an above-ground plant organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the chloroplast con with entire (or sometimes toothed or lobed) margins. The leaves may contain cystoliths, seen as streaks in the surface. FlowerA flower is the reproductive organ of those plants classified as angiosperms ( flowering plants; Division Magnoliophyta). The function of a flower is to produce seeds through sexual reproduction''. For the higher plants, seeds are the next generation, ands are perfectThe term perfect has different meanings: For the mathematical concept, see perfect number. For the philosophical concept, see perfection. The grammatical idea is described in perfect tense. In botany and mycology, an organism is considered perfect if it i, zygomorphic to nearly actinomorphic, these arranged in an inflorescenceAn inflorescence is a group or cluster of flowers on a branch of a plant. In botany, the term refers to the way individual flowers are arranged on the axis (floral stem). An inflorescence is said to be determinate if the number of flowers cannot increase that is either a spikeA raceme is a type of inflorescence that is unbranched and indeterminate and bears pedicellate flowers (having short floral stalks called pedicels along the axis. In botany, axis means a shoot, in this case one bearing the flowers. In a raceme, the oldest, racemeA raceme is a type of inflorescence that is unbranched and indeterminate and bears pedicellate flowers (having short floral stalks called pedicels along the axis. In botany, axis means a shoot, in this case one bearing the flowers. In a raceme, the oldest, or cyme. Typically there is a colorful bract subtending each flower; in some species the bract is large and showy. The calyx is usually 4-5 lobed; the corolla tubular, 2-lipped or 5-lobed; stamenThe stamen is the male organ of a flower. Typical flowers have six stamens inside a perianth (the petals and sepals together), but in some species there are many more than six present in a flower. Each stamen consists of a thin stalk called a filament sups either 2 or 4 arranged in pairs and inserted on the corolla; and the ovary superior, 2-carpellate, with axile placentation. The fruit is a two-celled capsule, dehiscing somewhat explosively. In most species, the seeds are attached to a small, hooked stalk (a modified funiculus called a jaculator) that ejects them from the capsule. Seeds non-endospermous with large embryos.

A species well-known to temperate gardeners is Acanthus mollis or Bear's breech: perennials with big (up to 1 m or 3 ft tall) leaves and equally tall flower spikes. Tropical genera familiar to gardeners include Thunbergia and Justicia .

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Topics: Acanthaceae Nees Species Family Acanthus Genera Leaves Breech...

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AcanthaceaeAcanthaceae Flowers of Odontonema cuspidatum Scientific classification Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Scrophulariales Family: Acanthaceae Genera Acanthus L. bear's breech Andrographis Wallich ex Nees false waterwillow