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デルフィニウム属(デルフィニウムぞく)とはキンポウゲ科の属の一つ。学名のDelphiniumは、ギリシア語でイルカを意味するDelphisから。これは、つぼみの形がイルカに似ていることに由来する。 和名はオオヒエンソウ属(大飛燕草属)であるが、あまり和名は使われない。
ヨーロッパ、北アメリカ、アジア、熱帯アフリカの山地に250種程度が分布する。 元来多年草であるが、日本の夏の暑さに耐えられないため、園芸店などでは一年草として扱われていることもある。 アルカロイドの一種、デルフィニンを有し、食べると下痢や嘔吐を起こし、死に至る場合がある。

【主な種】

ヒエンソウ(D. ajacis)
オオバナヒエンソウ(D. grandiflorum)
セリバヒエンソウ(D. anthriscifolium)

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花言葉|高貴
誕生花|3月23日


<花の特徴>
青色を中心とした左右対称の花を総状あるいは穂状につける。 花弁状のものは萼片で5個あり、上部のものは後ろに伸びて距をなす。

<葉の特徴>:葉は有柄で掌状に浅〜深裂する。
<実の特徴>:果実は袋果。

この花について

その他 耐寒性のある1〜多年草で、園芸品種が多く作出され、庭植え、切り花にされる。

<開花時期>:5〜6月
<花の色>:白、ピンク、赤、青、紫
<名前の読み>:でるふぃにうむ

<分布>:ヨーロッパ、アジア、北アメリカ、アフリカの山岳部に200種あまりが分布。
<生育地>:元来、冷涼・乾燥地のもので、多年草類は夏期高温多湿となる暖地には適さない。
<植物のタイプ>:多年草
<大きさ・高さ>:30〜200センチ

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<英文、WikipediaよりのDelphiniumより、品種と園芸関連の項目を転載>

Taxonomy・分類について

Delineation of Delphinium

Subgenera of Delphinium and related taxa
Genetic analysis suggests that Delphinium sensu lato, as it was delineated before the 21st century, is polyphyletic. Nested within Delphinium s.l. are Aconitella, Consolida, and Aconitum. To make Delphinium monophyletic, several interventions were made. The new genus Staphisagria was erected containing Delphinium staphisagria, D. requini, and D. pictum, representing the sister group to all other Delphinieae. Further genetic analysis has shown that the two large subgenera Aconitum (Aconitum) and Aconitum (Lycoctonum) are the sister group to Aconitum gymnandrum, Delphinium (Delphinium), Delphinium (Delphinastrum), Consolida and Aconitella. To make Aconitum monophyletic, A. gymnandrum has now been reassigned to a new monotypic genus, Gymnaconitum. Finally, Consolida and Aconitella are synonymized with Delphinium.

Subgenera

D. arthriscifolium is sister to all other species of Delphinium sensu stricto (so excluding Staphisagria). It should be placed in its own subgenus, but no proposal naming this subgenus has been made yet. The subgenera Delphinium (Delphinium) and Delphinium (Delphinastrum) are sister to the group consisting of the species of Consolida and Aconitella, which together make up the subgenus Delphinium (Consolida). Aconitella cannot be retained as a subgenus because A. barbata does not cluster with the remaining species previously assigned to that genus, without creating five further subgenera.

Species・品種について

Main article: List of Delphinium species
Selected species include:

Delphinium arthriscifolium
Delphinium brunonianum
Delphinium cardinale
Delphinium cheilanthum
Delphinium consolida
Delphinium elatum
Delphinium formosum
Delphinium grandiflorum
Delphinium nuttallianum

Reassigned species

Several species of Delphinium have been reassigned:

D. pictum = Staphisagria picta
D. requienii = Staphisagria requienii
D. staphisagria = Staphisagria staphisagria

Ecology

Delphiniums can attract butterflies and other pollinators.

Cultivation・園芸について

Delphiniums displayed at the Chelsea Flower Show

A Delphinium cultivar.
Various delphiniums are cultivated as ornamental plants, for traditional and native plant gardens. The numerous hybrids and cultivars are primarily used as garden plants, providing height at the back of the summer border, in association with roses, lilies, and geraniums.

Most delphinium hybrids and cultivars are derived from D. elatum. Hybridisation was developed in the 19th-century, lead by Victor Lemoine in France. Other hybrid crosses have included D. bruninianum, D. cardinale, D. cheilanthum, and D. formosum.

Numerous cultivars have been selected as garden plants, and for cut flowers and floristry. They are available in shades of white, pink, purple, and blue. The blooming plant is also used in displays and specialist competitions at flower and garden shows, such as the Chelsea Flower Show.

The 'Pacific Giant' hybrids are a group with individual single-color cultivar names, developed by Reinelt in the United States. They typically grow to 4–6 ft (1.2–1.8 m) tall on long stems, by 2–3 ft (0.61–0.91 m) wide. They reportedly can tolerate deer. Millennium delphinium hybrids, bred by Dowdeswell's in New Zealand, are reportedly better in warmer climates than the Pacific hybrids. Flower colors in shades of red, orange, and pink have been hybridized from D. cardinale by Americans Reinelt and Samuelson.

The following delphinium cultivars have received the Award of Garden Merit from the British Royal Horticultural Society:

'Atholl'
'Blue Dawn'
'Blue Nile'
'Bruce'
'Can-can'
'Cherub'
'Clifford Sky'
'Conspicuous'
'Elizabeth Cook'
'Emily Hawkins'
'Faust'
'Fenella'
'Galileo'
'Langdon's Pandora'
'Lilian Bassett'
'Lord Butler'
'Lucia Sahin'
'Michael Ayres'
'Min'
'Olive Poppleton'
'Oliver'
'Our Deb'
'Rosemary Brock'
'Spindrift'
'Sungleam'
'Sunkissed'
'Tiddles'
'Walton Gemstone'


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デルフィニウム属(Delphinium)