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The following is a list of tulip species and cultivars which have gained the Royal Horticultural Society's Award of Garden Merit.〔(Full lists 2015 ) The Royal Horticultural Society〕 They are bulbous perennials, originally from sunny, open habitats in Europe and Asia. Thousands of cultivars are available in a huge range of sizes, shapes and colours (other than pure blue). They are usually sold as bulbs to be planted in autumn and winter for flowering in mid- to late spring. They are frequently treated as bedding plants, accompanied by other seasonal favourites such as wallflowers and forget-me-nots, flowering for one season before being discarded. However, in favoured locations they can be left in the ground to re-appear the following and subsequent years. Like many other bulbous plants they require a hot, dry dormant period in the summer. ==Groups== Tulips are divided into 15 distinct groups:- #Single early - cup-shaped flowers to in diameter, often margined with contrasting colour; early to mid-spring #Double early - fully double bowl-shaped flowers to in diameter, often margined with contrasting colour; mid-spring #Triumph - single flowers to in diameter; mid- to late spring #Darwin hybrid - single flowers to in diameter; mid- to late spring #Single late - cup-shaped flowers to in diameter, includes the old cottage and Darwin groups; late spring #Lily-flowered - long, narrow blooms with flared, pointed petals; late spring #Fringed - edges of petals are fringed with a different colour; late spring #Viridiflora - flowers striped with green, or entirely green; late spring #Rembrandt - "broken" colours (striped or feathered) caused by a virus; late spring #Parrot - unevenly striped with irregularly cut edges; late spring #Double late - peony-shaped fully double flowers; late spring #Kaufmanniana - ''T. kaufmanniana'' and its hybrids, multi-coloured; early to mid-spring #Fosteriana - ''T. fosteriana'' and its hybrids; mid-spring #Greigii - ''T. greigii'' and its hybrids; early to mid-spring #Miscellaneous - all species and hybrids not included elsewhere; the smaller species require sharp drainage and are best grown in an alpine garden 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of Award of Garden Merit tulips」の詳細全文を読む スポンサード リンク
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