장미과

Spiraea alba

대효0617 2021. 12. 20. 20:55

학명 : Spiraea alba Du Roi

분류 : Rosaceae

 

사진  : 2021.10.21 도봉구 방학동

 

안내표지판도 없이 식재된 것이다. 꼬리조팝나무를 닮았으나 꽃 색이 흰색이다 . 이미지 검색을 해보니 위의 학명이 나온다 

 

 

 

FNA 설명

 

Spiraea alba Du Roi, Harbk. Baumz. 2: 430. 1772. [{Attr:E F W}]

Narrow-leaf, eastern, or white meadowsweet, spirée blanche

 

Shrubs, 1020 dm. Stems erect, unbranched. Leaves: petiole 28 mm, ˂puberulent or sparsely hairy˃; blade narrowly lanceolate to oblanceolate or broadly oblanceolate to obovate, 29 × 0.53 cm, ˂length 35 times width˃, chartaceous or membranous, base cuneate to rounded, margins finely to coarsely, sharply serrate to serrulate (sometimes doubly so on long shoot leaves), ˂number of primary and secondary serrations 0.51.1 times number of secondary veins (excluding inter-secondary veins)˃, venation pinnate craspedodromous, secondary veins not prominent, ˂irregularly terminating in primary teeth, inter-secondary veins usually 812+ per leaf˃, apex acute to obtuse, abaxial surface mostly glabrous, adaxial glabrous. Inflorescences mostly terminal, narrowly conic to open, pyramidal panicles, 520 × 310 cm ˂height 1.43.5 times diam.˃; branches ˂usually in axils of leaves˃, puberulent to pubescent. Pedicels 12(3) mm, glabrous or glabrate. Flowers 38 mm diam.; hypanthia hemispheric, 0.60.8 mm, abaxial surface usually puberulent to sparsely strigose, sometimes glabrate or glabrous, adaxial glabrous; sepals triangular, 0.81.5 mm; petals usually white, sometimes pink-tinged (in bud), suborbiculate, 1.32(3) mm; staminodes 04; stamens 3050, 12 times petal length. Follicles oblanceoloid, 34 mm, ˂shiny˃, glabrous.

 

Varieties 2 (2 in the flora): North America; introduced in Europe.

 

Varieties alba and latifolia have regions of hybridization, primarily around the Great Lakes, that produce intermediate forms that may be difficult to key. Recognition of these two taxa as either species or varieties has been problematic because the taxa are quite distinct at the extremes of their range. A. R. Kugel (1958) recognized them as distinct species and her work illustrates the regional zone of hybridization. H. A. Gleason (1952) and Gleason and A. Cronquist (1963) also recognized the two taxa as separate species; later Gleason and Cronquist (1991) recognized them as varieties that frequently intergrade.

 

The European Spiraea salicifolia has a leaf morphology that is similar to that of var. alba and the two taxa have been treated as conspecific. With the interest in Spiraea as an ornamental, S. salicifolia was imported to North America, resulting in this species or hybrids of it becoming naturalized. Specimens that are difficult to identify may be S. salicifolia, as escapes from homesteads and gardens that became established or may have hybridized with native taxa.

 

Spiraea alba has become locally naturalized in western and central Europe; in the British Isles, its hybrids are commonly naturalized as S. ×rosalba Dippel (S. alba × S. salicifolia), or as S. ×billardii Hortus ex K. Koch (S. alba × S. douglasii) (A. J. Silverside 1990).

 

 

종하 분류군

 

1. Leaves: lengths 34 times widths,

    margins finely serrate to serrulate;

   inflorescences narrowly conic.

    ....................................................... Spiraea alba var. alba

1. Leaves: lengths 23 times widths,

    margins coarsely serrate;

   inflorescences open, pyramidal.

   ...................................................... Spiraea alba var. latifolia

 

 

 

 

 

 

 

 

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