生物分類學上包含約30種觀賞性灌木和喬木的一個屬，主要分布於北溫帶區，但可往南沿著安地斯山脈延伸至南緯20度的地區，不過此現象僅出現於美洲地區。赤楊與樺樹之不同處在於其冬天萌發之帶柄嫩芽；此外，在其有翅果仁爆開後，毬果仍會留在樹枝上。有些赤楊品種的鱗狀樹皮為灰棕色，其他則幾乎皆為白色；其葉片為橢圓形互生葉，邊緣有鋸齒，通常有淺裂痕，初展開時具黏性，成熟後有光澤，落葉時顏色不變；赤楊之花朵乃雌雄同株，但不同花序，花苞在夏天長出，一般會在次年春天葉子展開前綻放。

赤楊屬(P,,U,繁體中文-偏好,D,U,U)
赤楊(屬)　(,U,繁體中文-非偏好,UF,U,U)
ch'ih yang shu(P,,U,韋氏拼音-偏好,UF,U,U)
chì yáng shǔ(P,,U,漢語拼音-偏好,UF,U,U)
chi yang shu(P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
Alnus(genus)　(P,,U,英文-偏好,D,U,U)
Alnus(genus)　(P,,U,拉丁語-偏好,D,U,U)
alder(genus)　(,U,英文-非偏好,UF,U,U)
alders(genus)　(,U,英文-非偏好,UF,U,U)

藝術與建築詞典根目錄
....代理者層面
........活體有機體
............真核生物 (域)
................植物界 (界)
....................被子植物門 (門)
........................木蘭綱 (綱)
............................殼斗目 (目)
................................樺木科 (科)
....................................赤楊屬

source plant or animal for....

榿木(木材)

英文....

Genus containing about 30 species of ornamental shrubs and trees that are primarily north temperate in distribution, but range south through the Andes to about latitude 20 degrees S. It is only in the Americas that members of the family extend along the mountains into the Southern Hemisphere. An alder may be distinguished from a birch by its usually stalked winter buds and by cones that remain on the branches after the small, winged nutlets are released. The scaly bark is grayish brown in some species and almost white in others. The oval leaves are alternate, serrate, and often shallowly lobed; sticky on unfolding but glossy when mature, they fall without changing colour. Male and female flowers are borne in separate catkins on the same tree; they form during the summer and usually blossom the following spring before the leaves open.

赤楊屬............	[AS-Academia Sinica]
.................	國家教育研究院－雙語詞彙、學術名詞暨辭書資訊網 July 16, 2013
.................	經濟部智慧財產局－本國專利技術名詞中英對照查詢資料庫 July 13, 2020
.................	有道youdao詞典 July 13, 2020
赤楊(屬)............	[AS-Academia Sinica]
.................	國家教育研究院－雙語詞彙、學術名詞暨辭書資訊網 July 13, 2020
.................	經濟部智慧財產局－本國專利技術名詞中英對照查詢資料庫 July 13, 2020
Alnus(genus)............	[VP]
.................	Raven et al., Biology of Plants (2005)
.................	USDA, Natural Resources Conservation Guide (2008-)
.................	Encyclopedia Britannica Online (2002-)
alder(genus)............	[VP]
.................	Encyclopedia Britannica Online (2002-)
alders(genus)............	[VP]
.................	Encyclopedia Britannica Online (2002-)

Getty AAT: 300343619 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300343619
聯合目錄： 赤楊屬 、赤楊 、ch'ih yang shu 、chì yáng shǔ 、chi yang shu 、Alnus 、alder 、alders 、Alnus