Viola reichenbachiana

Viola reichenbachiana
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Violaceae
Genus: Viola
Species:
V. reichenbachiana
Binomial name
Viola reichenbachiana
Jord. ex Boreau 1857
Viola reichenbachiana - MHNT

Viola reichenbachiana, also known as the early dog-violet, pale wood violet, slender wood violet, hedge violet, or wood dog violet, is a species of flowering plant in the Viola genus.[1][2][3][4] This species hybridises with Viola riviniana, the common dog-violet, to produce Viola × bavarica.[5] The plant is named after the 19th century botanist Ludwig Reichenbach.[6] It is a rhizomatous herbaceous perennial that is widely known for its purple petals, and it typically resides along road banks or among other rich vegetation, as other wild pansies do.[1][7] The name dog violet refers to its lack of scent, making it supposedly only fit for dogs.[8][3]

Description

Viola reichenbachiana grows to 5–15 cm (2.0–5.9 in) in height and 10–50 cm (3.9–19.7 in) in spread.[3] The leaf orientation is simple and grows alternately.[1][4] The plant has wide, heart-shaped blades with rounded, tooth-like ridges.[1][3][7] The leaves may be hairless or very slightly textured, and their tips may be pointed or hooked.[3][7] Its upper leaves tend to be smaller and darker in color.[4] Its leaf typically has 4 or 5 veins on either side of a main vein called the midrib.[4]

The flower of Viola reichenbachiana is bisexual, containing both male and female reproductive structures.[4] It has 3 or 5 narrow, non-overlapping petals that are a signature dull purple.[1][4] The flower typically has 5 small, pointed sepals, 5 stamens, and 1 carpel.[1] These flowers can range from 1.5 to 2 cm across.[4] They can be recognized by their star-like appearance due to the separated petals or their deep violet-blue spurs.[3][9] Pollination can occur via insects, self-pollination, or cross-pollination.[4]

Its seeds have rather thick cotyledons to nourish the embryo, and the fruits that develop around them usually have 3 lobes.[1] The roots have many root hairs for absorption and grow rhizomatously, meaning they propagate through above-ground runners known as stolons.[3][7]

Cultivation

Viola reichenbachiana is found throughout central Europe spanning all the way to parts of Asia around the Himalayan Mountains.[7] It resides in regions such as England, Scotland, Wales, North Africa, China, India, and Pakistan.[7] Its natural habitats include hardwood forests or other wooded areas with broad leaves.[1] It grows most successfully under maximum or partial sunlight and moderate watering, and the minimum temperature at which it can survive is -20 degrees Celsius.[3][9] It thrives in acidic to neutral fertile soil that is damp but well-drained.[9][10] They normally take approximately 3 years to reach maturity, and are grown mainly for the aesthetic of their distinct flowers.[3] Its flowers typically bloom between late February and May, and its fruits are produced from May to August.[7]

The plant faces predation by slugs, snails, red spider mites, gall midges, and aphids, and it is also the food source for fritillary butterfly larvae.[3][7][9][11] Common diseases include the browning of petals and leaves due to anthracnose fungus, powdery mildew, stem rot, rust on leaf undersides, and smut pustules on leaf stalks that discharge spores.[4][11]

RHS Hardiness

The Royal Horticultural Society recognizes V. reichenbachiana as an H6 on the Hardiness Scale, meaning that it is "hardy in all of UK and northern Europe", and its minimum temperature ranges are -20 to -15 degrees Celsius.[9]

References

  1. ^ a b c d e f g h "Early Dog Violet, Viola reichenbachiana - Flowers - NatureGate". luontoportti.com. Retrieved 2024-04-09.
  2. ^ Viola reichenbachiana Jord. ex Boreau in GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset doi:10.15468/39omei accessed via GBIF.org
  3. ^ a b c d e f g h i j “Early Dog Violet (Viola Reichenbachiana) - Plants.” Candide, https://candide.com/IE/plants/df534849-458c-4122-98bc-31d13f2f5891.
  4. ^ a b c d e f g h i “Viola Reichenbachiana Jordan Ex Boreau: Species.” Ganeshaiah, K. N., UAS, Bangalore, India.; Kailash, B. R., ATREE, Bangalore, India.; Royal Norwegian Embassy grants. Indian Bioresource Information Network (IBIN), Department of Biotechnology, New Delhi, India. India Biodiversity Portal, IBP, https://indiabiodiversity.org/species/show/262252.
  5. ^ Stace, Clive A. (2010). New flora of the British Isles. Cambridge: Cambridge University Press. ISBN 978-0-521-70772-5. OCLC 647075102.
  6. ^ Boreau, A.; Boreau, A. (1857). Flore du centre de la France et du bassin de la Loire, ou, Description des plantes qui croissent spontanément, ou qui sont cultivées en grand dans les départements arrosés par la Loire et ses affluents, avec l'analyse des genres et des espèces. Vol. 1857. (3e éd., très augm. ed.). Paris: Librairie encyclopédique de Roret.
  7. ^ a b c d e f g h “Viola Reichenbachiana - Early Dog-Violet.” FirstNature, 2022, https://www.first-nature.com/flowers/viola-reichenbachiana.php.
  8. ^ “Viola Riviniana - Common Dog-Violet.” FirstNature, 2022, https://www.first-nature.com/flowers/viola-riviniana.php#:~:text=Common%20Dog-violets%20%28referred%20to%20as%20Dog-violets%20because%20they,as%20late%20as%20the%20start%20of%20July.%20Uses.
  9. ^ a b c d e “Viola Reichenbachiana - RHS Gardening.” RHS Plant Finder & Selector, Royal Horticultural Society, https://www.rhs.org.uk/plants/98441/viola-reichenbachiana/details.
  10. ^ “Viola Reichenbachiana - Jordan.” Plants for a Future Database, PFAF, https://pfaf.org/user/Plant.aspx?LatinName=Viola%2Breichenbachiana#:~:text=The%20plant%20is%20used%20as,sores%20and%20wounds%5B240%5D.
  11. ^ a b “Viola Diseases.” Old House Web, OHW Database, 2022, https://www.oldhouseweb.com/gardening/viola-diseases.shtml.
  • Partridge, James (2007) Viola × bavarica: the punctual Dog-violet BSBI News 106:8-9 (illustrated with colour photographs on inside back cover of this edition)

Media related to Viola reichenbachiana at Wikimedia Commons

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