Many species of Viola produce seed by means of both cleistogamous and chasmogamous flowers. , In the United States, the common blue violet Viola sororia is the state flower of Illinois, Rhode Island, New Jersey and Wisconsin, In Canada, the Viola cucullata is the provincial flower of New Brunswick adopted in 1936 In the United Kingdom, Viola riviniana is the county flower of Lincolnshire. species);. An external agent is required for this. JSTOR provides a digital archive of the print version of New Phytologist. Striped White Violet self-seeds profusely and is perfect to create a dense ground cover.  With about 61 species including; A small S American section with about 8 species, as sister group to Erpetion, including; One fossil seed of †Viola rimosa has been extracted from borehole samples of the Middle Miocene fresh water deposits in Nowy Sacz Basin, West Carpathians, Poland. The pollen travels from the stamen down into the flower's own ovary. , One characteristic of some Viola is the elusive scent of their flowers; along with terpenes, a major component of the scent is a ketone compound called ionone, which temporarily desensitizes the receptors of the nose, thus preventing any further scent being detected from the flower until the nerves recover.  In 1926, one of the first plays to involve a lesbian relationship, La Prisonnière by Édouard Bourdet, used a bouquet of violets to signify lesbian love. the genus Viola throughout the temperate regions of the world. papers on all aspects of the plant sciences.  Violets whose seeds are dispersed this way have specialized structures on the exterior of the seeds called elaiosomes. Bedding plants are usually discarded after one growing season. Some hybrid pansies will revert to Johnny-Jump-Ups as the dropped seeds sprout up as volunteer seedlings. , Many species, varieties and cultivars are grown in gardens for their ornamental flowers. 5 (1754)", https://en.wikipedia.org/w/index.php?title=Viola_(plant)&oldid=991832818, Short description is different from Wikidata, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Wikipedia articles incorporating citation to the NSRW, Wikipedia articles incorporating citation to the NSRW with an wstitle parameter, Creative Commons Attribution-ShareAlike License, This page was last edited on 2 December 2020, at 01:34. The terms viola and violet are normally reserved for small-flowered annuals or perennials, including the wild species. In addition, submitted reviews are But not other "violets": Neither Streptocarpus sect.  These reportedly high rates of outcrossing and genetic diversity indicate that these violets are strong competitors for pollinators during the early spring when they are in bloom and that those pollinators can travel considerable distances between often fragmented populations. This item is part of JSTOR collection Viola species are used as food plants by the larvae of some Lepidoptera species, including the giant leopard moth, large yellow underwing, lesser broad-bordered yellow underwing, high brown fritillary, small pearl-bordered fritillary, pearl-bordered fritillary, regal fritillary, cardinal, and Setaceous Hebrew character. Grows up to 10-12 in. For terms and use, please refer to our Terms and Conditions The pungent perfume of some varieties of V. odorata adds inimitable sweetness to desserts, fruit salads, and teas while the mild pea flavor of V. tricolor combines equally well with sweet or savory foods, like grilled meats and steamed vegetables.  Centres of diversity occur mainly in the northern hemisphere, in mountainous regions of eastern Asia, Melanesia, and southern Europe, but also occur in the Andes and the southern Patagonian cone of South America. The first type has petals and is pollinated by insects, the second type, known as cleistogamous, does not have petals, never opens, but self-fertilizes and produces fertile seed[270. However, the exact phylogenetic relationships remain unresolved, as a consequence many different taxonomic nomenclatures are in use, including groupings referred to as Grex. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil.  One of the highest species concentrations is in the former USSR. Many species also produce self-pollinated cleistogamous flowers in summer and autumn that do not open and lack petals. ©2000-2020 ITHAKA. It is in flower from April to May, and the seeds ripen from July to August. The flowers have a superior ovary with one cell, which has three placentae, containing many ovules. Even Berlioz didn't like violas. The journal is non-profit making. Plants always have leaves with stipules that are often leaf-like. There is no chance of cross-pollination. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. Violet species occupy a diverse array of habitats, from bogs (Viola lanceolata) to dry hill prairies (V. pedata) to woodland understories (V. labradorica). This requires emphasis since it is not always apparent, particularly among insect-pollinated plants. Observations on insects visiting pansy fields grown in the Netherlands for seed production made it clear that bumble‐bees ( Bombus spp.) This requires emphasis since it is not always apparent, particularly among insect-pollinated plants. Viola langsdorffii is a herbaceous, perennial plant producing 1 - 3 ascending to erect stems 2 - 30cm tall from a fleshy rhizome[270. VIOLA BY A. J. BEATTIE* Hartley Botanical Laboratories, The University of Liverpool (Received i9 March I969) SUMMARY The floral biology of Viola riviniana Rchb., V. reichenbachiana Jord. , The modern garden pansy (V. × wittrockiana) is a plant of complex hybrid origin involving at least three species, V. tricolor (wild pansy or heartsease), V. altaica, and V. lutea (mountain pansy). Flower pollination is the transmitting of pollen from a stamen to an ovule.  This system is especially important in violets, as these plants are often weak competitors for pollination due to their small size. Candied violets are still made commercially in Toulouse, France, where they are known as violettes de Toulouse. The varying activities of insect-visitors while feeding result in the deposition of pollen at different locations on the integument. Our core businesses produce scientific, technical, medical, and scholarly journals, reference works, books, database services, and advertising; professional books, subscription products, certification and training services and online applications; and education content and services including integrated online teaching and learning resources for undergraduate and graduate students and lifelong learners.  The extensive taxonomic studies of Wilhelm Becker, culminating in his 1925 conspectus, resulted in 14 sections and many infrasectional groups. Flowering is often profuse, and may last for much of the spring and summer. Two species of zinc violet (V. calaminaria and V. guestphalica) are capable of living in soils severely contaminated with heavy metals. Once seed capsules have matured, seeds are dispelled around the plant through explosive dehiscence. The styles are filiform (threadlike) or clavate (clubshaped), thickened at their tip, being globose to rostellate (beaked). 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