Helwingia

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Helwingia
Helwingia japonica m.jpg
Flowering Helwingia japonica var. japonica specimen
Helwingia japonica (fruits s4).jpg
Detail of epiphyllous Helwingia japonica fruit
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Aquifoliales
Family: Helwingiaceae
Decne. [1]
Genus: Helwingia
Willd.
Helwingia distribution.png
Distribution of Helwingia

The genus Helwingia consists of shrubs or rarely small trees native to eastern Asia, the Himalayas, and northern Indochina. It is the only genus in the family Helwingiaceae. [2] [3]

Contents

Description

The plants have alternate, evergreen or deciduous leaves and small inflorescences that are epiphyllous (growing from the leaf surface). During development, the flowers appear separate from the leaves,[ further explanation needed ], eventually fusing with the leaf midrib. [4] Flowers are small and yellow-green or purple, followed by red or black berries. Plants are dioecious. [5]

Epiphyllous inflorescences

This trait is rather unusual among plants. This atypical floral position upon a leaf is believed to be an adaption to insect pollination. Pollinators which are too large to be supported by the floral pedicels, land on the leaf surface and can pollinate the flowers, which would not be able to support the pollinators on their own. [6]

Taxonomy

The APG II classification (2003) places them in the order Aquifoliales, along with the hollies and Phyllonomaceae, which also has epiphyllous flowers. [7]

The family Helwingiaceae does not exist in the Cronquist classification (1981), which places this genus in the Cornaceae (dogwood family). Helwingia has also previously been placed in the Araliaceae (ginseng family). [8]

The family is named for botanist Georg Andreas Helwing. [9]

Species

Species adapted from the World Checklist of Selected Plant Families: [2]

  1. Helwingia chinensis Batalin - Thailand, Myanmar, China: Gansu, Guizhou, Hubei, Hunan, Shaanxi, Sichuan, Tibet, Yunnan
  2. Helwingia himalaica Hook.f. & Thomson ex C.B.Clarke - Thailand, Myanmar, Bhutan, Nepal, India: Assam, Sikkim, China: Tibet, Chongqing, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Sichuan, Yunnan
  3. Helwingia japonica (Thunb.) F.Dietr. - Japan (incl. Ryukyu Islands), Korea, Taiwan, Myanmar, Bhutan, Vietnam, India: Assam, Sikkim, China: Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shandong, Shanxi, Sichuan, Yunnan, Zhejiang
  4. Helwingia omeiensis (W.P.Fang) H.Hara & S.Kuros. - China: Gansu, Guangxi, Guizhou, Hubei, Hunan, Shaanxi, Sichuan, Yunnan

Related Research Articles

<span class="mw-page-title-main">Aquifoliales</span> Order of flowering plants

The Aquifoliales are an order of flowering plants, including the Aquifoliaceae (holly) family, and also the Helwingiaceae and the Phyllonomaceae. In 2001, the families Stemonuraceae and Cardiopteridaceae were added to this order. This circumscription of Aquifoliales was recognized by the Angiosperm Phylogeny Group when they published the APG II system in 2003. In the Cronquist system, there is no Aquifoliales order: the Aquifoliaceae are placed within the order Celastrales and the others are in other families.

<i>Adenophora</i> Genus of flowering plants

Adenophora is a genus of flowering plants in the family Campanulaceae, the bellflowers. Plants of this genus are known commonly as ladybells. Most are native to eastern Asia, with a few in Europe. Many are endemic to either China or Siberia.

<i>Bletilla</i> Genus of orchids

Bletilla, common name urn orchid, is a temperate, terrestrial genus of orchids containing five currently recognized species distributed through China, Japan, Taiwan, south to Vietnam, Thailand and Myanmar. The name is actually a diminutive of Bletia because of the resemblance between the two genera even though Bletia is a New World genus. The genera JimensiaRaf. and PolytomaLour. ex Gomes are generally included into Bletilla. This genus is abbreviated Ble in trade journals.

<i>Triadica</i> Genus of flowering plants

Triadica is a plant genus of the family Euphorbiaceae first described as a genus in 1790. It is native to eastern southeastern, and southern Asia.

<i>Maianthemum</i> Genus of flowering plants

Maianthemum includes the former genus Smilacina and is a genus of perennial herbaceous flowering plants with fleshy, persistent rhizomes. It is widespread across much of North America, Europe and Asia, and may be terrestrial, aquatic or epiphytic. It is characterized by simple, unbranched stems that are upright, leaning or hanging down and have 2–17 foliage leaves. Leaves are simple and may clasp the stem or be short-petiolate. The inflorescence is terminal and either a panicle or a raceme with few to many pedicelate flowers. Most species have 6 tepals and 6 stamens; a few have parts in 4s. Tepals are distinct in most species and all of similar size. Flowers are spreading, cup-shaped or bell-shaped and usually white, but lavender to red or green in some species. Fruits are rounded to lobed berries containing few to several seeds.

<i>Paris</i> (plant) Genus of flowering plants

Paris is a genus of flowering plants described by Linnaeus in 1753. It is widespread across Europe and Asia, with a center of diversity in China.

<i>Tacca</i> Genus of flowering plants

The genus Tacca, which includes the batflowers and arrowroot, consists of flowering plants in the order Dioscoreales, native to tropical regions of South America, Africa, Australia, Southeast Asia, and various Oceanic islands. In older texts, the genus was treated in its own family Taccaceae, but the 2003 APG II system incorporates it into the family Dioscoreaceae. The APG III and APG IV systems continue to include Tacca in Dioscoreaceae.

<i>Rohdea</i> Genus of flowering plants

Rohdea is a genus of plants native to eastern Asia. It was long thought to contain only a single species, R. japonica, but recent studies have resulted in several other taxa being transferred into the genus.

<i>Holcoglossum</i> Genus of orchids

Holcoglossum (Holc.) is a genus of orchids, in the family Orchidaceae. It is native to China and Southeast Asia.

<i>Aletris</i> Genus of flowering plants

Aletris, the colicroot, colicweed, crow corn, or unicorn root, is a genus of flowering plants in the family Nartheciaceae, native to North America and to eastern and southeastern Asia, especially China. It was used as a component in Lydia Pinkham's original Vegetable Compound.

<i>Phyllonoma</i> Genus of flowering plants

Phyllonoma is a genus consisting of 4 species of trees and shrubs. Phyllonoma is the sole genus in the family Phyllonomaceae. Phyllonoma species are native to South and Central America.

<i>Linnaea</i> Genus of flowering plants in the honeysuckle family Caprifoliaceae

Linnaea is a plant genus in the honeysuckle family Caprifoliaceae. Until 2013, the genus included a single species, Linnaea borealis. In 2013, on the basis of molecular phylogenetic evidence, the genus was expanded to include species formerly placed in Abelia, Diabelia, Dipelta, Kolkwitzia and Vesalea. However, this is rejected by the majority of subsequent scientific literature and flora.

<i>Caryopteris</i> Genus of flowering plants

Caryopteris is a genus of flowering plants in the family Lamiaceae. They are native to east Asia.

<i>Bletilla ochracea</i> Species of orchid

Bletilla ochracea, commonly known as Chinese butterfly orchid, is a species of orchid native to Vietnam and China.

<i>Dysosma</i> Genus of flowering plants belonging to the barberry family

Dysosma is a group of herbaceous perennials in the Berberidaceae or barberry family described as a genus in 1928. It is native to China and Indochina.

<i>Coriaria nepalensis</i> Species of shrub

Coriaria nepalensis is a shrub of the genus Coriaria. It grows in the foot hills of Himalayas. It blooms in spring and has bright yellow flowers and red fruits in summer.

Schnabelia is a genus of plants in the family Lamiaceae, first described in 1921. The entire genus is endemic to China.

<i>Mosla</i> Genus of flowering plants

Mosla is a genus of plants in the family Lamiaceae, first described as a genus in 1875. It is native to eastern Asia, the Himalayas, and southeastern Asia.

  1. Mosla bracteataDoan ex Suddee & A.J.Paton - Vietnam
  2. Mosla cavalerieiH.Lév.- Vietnam, Guangdong, Guangxi, Guizhou, Hubei, Jiangxi, Sichuan, Yunnan, Zhejiang
  3. Mosla chinensisMaxim. - Vietnam, Korea, Japan, Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Shandong, Sichuan, Taiwan, Zhejiang
  4. Mosla coreanaH.Lév. - Korea
  5. Mosla dianthera(Buch.-Ham. ex Roxb.) Maxim. - China, Japan, Korea, Ryukyu Islands, Kuril Islands, Primorye, Caucasus, Himalayas, Myanmar, Vietnam, Philippines, Sumatra
  6. Mosla exfoliata(C.Y.Wu) C.Y.Wu & H.W.Li - Sichuan
  7. Mosla hangchouensisMatsuda - Zhejiang
  8. Mosla japonica(Benth. ex Oliv.) Maxim. - Japan, Korea, Ryukyu Islands
  9. Mosla longibracteata(C.Y.Wu & S.J.Hsuan) C.Y.Wu & H.W.Li - Guangxi, Zhejiang
  10. Mosla longispica(C.Y.Wu) C.Y.Wu & H.W.Li - Jiangxi
  11. Mosla pauciflora(C.Y.Wu) C.Y.Wu & H.W.Li - Guizhou, Hubei, Sichuan
  12. Mosla punctulataNakai - Korea, Taiwan, Japan, China
  13. Mosla scabra(Thunb.) C.Y.Wu & H.W.Li - Vietnam, Korea, Japan, Ryukyu Islands, Anhui, Fujian, Gansu, Guangdong, Guangxi, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shaanxi, Sichuan, Taiwan, Zhejiang
  14. Mosla soochouensisMatsuda - Anhui, Jiangsu, Jiangxi, Zhejiang
  15. Mosla tamdaoensisPhuong - Vietnam

Prunus clarofolia is a species of cherry found in Anhui, Gansu, Guizhou, Hebei, Henan, Hubei, Hunan, Ningxia, Shaanxi, Shanxi, Sichuan, Tibet, Yunnan and Zhejiang provinces of China. A shrubby tree 2.5 to 20 m tall, it prefers to grow on mountain slopes between 800 and 3,600 m above sea level. As Prunus litigiosa it is called the tassel cherry and sold as an ornamental for its interesting flowers and columnar form.

Prunus conradinae is a species of flowering cherry native to Fujian, Gansu, Guangxi, Guizhou, Henan, Hubei, Hunan, Shaanxi, Sichuan, Yunnan and Zhejiang provinces of China. There it prefers to grow in forested ravines and slopes at 500 to 2100 m above sea level. A small tree growing to at most 10 m, it has leaves that are lighter green on their undersides. It has fragrant, white to pale pink flowers with 32 to 54 stamens. It is planted outside its native range as an ornamental due to its habit of flowering in late winter. In warmer conditions it may even flower in early January.

References

  1. Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society. 161 (2): 105–121. doi: 10.1111/j.1095-8339.2009.00996.x .
  2. 1 2 Kew World Checklist of Selected Plant Families
  3. Flora of China Vol. 14 Page 227 青荚叶属 qing jia ye shu Helwingia Willdenow, Sp. Pl. 4: 634, 716. 1806, nom. cons., not Helvingia Adanson (1763).
  4. Dickinson, Timothy A.; Sattler, Rolf (1975). "Development of the Epiphyllous Inflorescence of Helwingia japonica (Helwingiaceae)". American Journal of Botany. 62 (9): 962–973. doi:10.2307/2441641. ISSN   0002-9122. JSTOR   2441641.
  5. Sun, Cheng; Yu, Guoliang; Bao, Manzhu; Zheng, Bo; Ning, Guogui (2014). "Biological pattern and transcriptomic exploration and phylogenetic analysis in the odd floral architecture tree: Helwingia willd". BMC Research Notes. 7: 402. doi:10.1186/1756-0500-7-402. PMC   4083144 . PMID   24969969.
  6. Sun, Cheng; Yu, Guoliang; Bao, Manzhu; Zheng, Bo; Ning, Guogui (2014). "Biological pattern and transcriptomic exploration and phylogenetic analysis in the odd floral architecture tree: Helwingia willd". BMC Research Notes. 7: 402. doi:10.1186/1756-0500-7-402. PMC   4083144 . PMID   24969969.
  7. Dickinson, T. A.; Sattler, R. (1974). "Development of the epiphyllous inflorescence of Phyllonoma integerrima (Turcz.) Loes.: implications for comparative morphology*". Botanical Journal of the Linnean Society. 69 (1): 1–13. doi:10.1111/j.1095-8339.1974.tb01609.x. ISSN   1095-8339.
  8. Hara, Hiroshi; Kurosawa, Sachiko (1975). Ohashi, H. (ed.). "A Revision of the Genus Helwingia". Flora of the Eastern Himalayas. 3: 393–413.
  9. Hinkley, Daniel J. (1 May 2007). "Helwingia". Horticulture Magazine.{{cite web}}: CS1 maint: url-status (link)