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Published In: Öfversigt af Förhandlingar: Kongl. Svenska Vetenskaps-Akademien 15(3): 114. 1858. (Öfvers. Förh. Kongl. Svenska Vetensk.-Akad.) Name publication detail

Project Name Data (Last Modified On 9/22/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native


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2. Salix amygdaloides Andersson (peach-leaved willow)

Pl. 554 a–c; Map 2574

Plants small to large trees, 4–20 m tall, usually not clonal by suckering but sometimes clonal by stem fragmentation. Trunks with the bark becoming deeply ridged and furrowed, reddish brown to more commonly dark grayish brown. Branches flexible or less commonly somewhat brittle at the base, reddish brown to dark grayish brown. Branchlets tan or grayish to yellowish brown, sometimes darkening and becoming reddish-tinged with age, not glaucous, glabrous. Winter buds sharply pointed at the tip, the scale margins free and overlapping along the side facing the stem. Petioles 7–21 mm long, lacking glands or with paired glandular dots at the tip, the upper side sometimes hairy. Leaves alternate. Stipules minute to well-developed in age, sometimes persistent through the growing season, rounded at the tip. Leaf blades 6–13 cm long, mostly 3–6 times as long as wide, narrowly elliptic to elliptic or lanceolate to narrowly oblanceolate or oblanceolate, tapered to a sharply pointed tip, angled, rounded, or shallowly cordate at the base, the margins flat, sharply toothed, the upper surface dull, glabrous to sparsely and inconspicuously hairy along the midvein, the undersurface glaucous, glabrous. Catkins flowering slightly before or as the leaves appear, on distinct, leafy, flowering branchlets; the bracts 1.5–2.8 mm long, entire or toothed, rounded to pointed at the tip, tawny, glabrous or sparsely to moderately hairy toward the base, those of the pistillate catkins not persistent at fruiting; the staminate catkins 2.3–8.0 cm long; the pistillate catkins 4–11 cm long. Staminate flowers with 3–7 stamens, the filaments free, hairy toward the base; nectaries 2, free. Pistillate flowers with the styles fused nearly to the tip, the stigmas short; nectary 1. Fruits 3–7 mm long, on stalks 1–3 mm long. 2n=38. April–June.

Scattered in the state, most commonly in counties adjoining the Mississippi and Missouri Rivers (Washington, New York, south to Arizona, Texas, and West Virginia; Canada). Banks of streams and rivers, margins of ponds and lakes, bottomland forests, swamps, edges of fens and marshes, and bases of bluffs; occasionally also mine spoils.

Salix amygdaloides sometimes can be difficult to distinguish from the more abundant S. nigra. Further complicating the situation, where the species grow in proximity occasional hybrids have been reported. These have been called S. ×glatfelteri C.K. Schneid., based on plants studied by Noah Glatfelter in the St. Louis area. Glatfelter (1894), who investigated this hybrid complex in the field, estimated that more than forty percent of the populations in the St. Louis area contained hybrids. However, there are no recent collections, perhaps because of the widespread destruction of wetlands during subsequent urban expansion and the alteration of hydrological processes following damming and channelization of rivers. The hybrids have leaves with the narrower shape characteristic of S. nigra, but with at least some glaucousness on the undersurface, as in S. amygdaloides.

Glatfelter (1898) also reported the hybrid between S. amygdaloides and S. caroliniana, but this could not be confirmed (Argus, 1986, 2010).



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