|
''Lindera melissifolia'', common name pondberry or southern spicebush, is a stoloniferous, deciduous, aromatic shrub in the laurel family. This endangered species is native to the southeastern United States, and its demise is associated with habitat loss from extensive drainage of wetlands for agriculture and forestry.〔(US Fish and Wildlife Service: Species Recovery Plan: ''Lindera melissifolia''. )〕〔(US Fish and Wildlife Service / Raleigh Ecological Services Field Office )〕 Restoration efforts are currently being conducted. ==Description== Form: Pondberry occurs in dense thickets with erect or ascending shoots up to 2 m tall and few branches; stems are connected underground by stolons. Thickets of female plants tend to be smaller than those of males and are sometimes absent from populations.〔(FAO "Effect of global climate change on rare trees and shrubs" )〕 Die-back of stems is a fairly common occurrence. Foliage: The drooping, alternate leaves are oblong-elliptic to narrowly ovate, 5–16 cm long, 2–6 cm wide, and tend to be strongly tapered to a point at the tip.〔(Patrick, T.S.; Allison, J.R.; Krakow, G.A..1995. Protected Plants of Georgia, An Information Manual on Plants Designated by the State of Georgia as Endangered, Threatened, Rare or Unusual. Georgia Department of Natural Resources. )〕 Undersides are strongly net-veined and covered with short, soft hairs. When crushed, the leaves strongly resemble sassafras (''Sassafras albidum'') in fragrance.〔 Foliage is deciduous. Flowers: Stems flower after 2 to 4 years of growth.〔(Devall, Margaret; Schiff, Nathan; Boyette, Douglas. 2001. Ecology and reproductive biology of the endangered pondberry, ''Lindera melissifolia'' (Walt) Blume. Natural Areas Journal. 21:250-258. )〕 Male and female flowers, each 5–6 mm across, are produced on different plants (dioecious).〔 Flowers appear before the leaves (February to mid-March) in tight, stalkless clusters. The petal-like tepals are pale to bright yellow, oblong, and 2 mm long. Male flowers occur in dense clusters, with 9-12 stamens surrounded by two whorls of tepals. Female flowers are less conspicuous, with fewer flowers per cluster and a single pistil surrounded by two whorls of tepals; the outer whorl is petal-like and the inner whorl is reduced to nectar-producing scales. Flowers remain open for about 1 week making thickets conspicuous.〔 Flowers are thought to be insect pollinated.〔 Late season frosts occasionally damage flowers, resulting in reduced fruit set. Fruit: A bright red, single-seeded drupe, ellipsoid, 10–12 mm long matures in late summer or fall (August to early October). Individual fruit stalks are 9–12 mm long, 2.5-3.0 mm thick, and appear swollen at the apex. Stalks persist beyond fruit fall; their presence indicates the plant's sex and past level of fruit production. Fruit production is highly variable from year-to-year, ranging from 0 to 150 fruit per stem.〔 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「Lindera melissifolia」の詳細全文を読む スポンサード リンク
|