中文名（Chinese Name）：榛
学名（Scientific Name）：Corylus heterophylla Fisch. ex Trautv.
英文名（English Common Name）：Siberian hazelnut
别名（Chinese Common Name）：榛子
异名（Synonym）：Corylus heterophylla var. thunbergii Blume；Corylus avellana var. davurica Ledeb.
科属（Family & Genus）：桦木科（Betulaceae）榛属
形态特征（Description）：灌木或小乔木，高1-7米；树皮灰色；枝条暗灰色，无毛，小枝黄褐色，密被短柔毛兼被疏生的长柔毛，无或多少具刺状腺体。叶的轮廓为矩圆形或宽倒卵形，长4-13厘米， 宽2.5-10厘米，顶端凹缺或截形，中央具三角状突尖，基部心形，有时两侧不相等，边缘 具不规则的重锯齿，中部以上具浅裂，上面无毛，下面于幼时疏被短柔毛，以后仅沿脉疏被 短柔毛，其余无毛，侧脉3-5对；叶柄纤细，长1-2厘米，疏被短毛或近无毛。雄花序单 生，长约4厘米。果单生或2-6枚簇生成头状；果苞钟状，外面具细条棱，密被短柔毛兼 有疏生的长柔毛，密生刺状腺体，很少无腺体，较果长但不超过1倍，很少较果短，上部浅 裂，裂片三角形，边缘全缘，很少具疏锯齿；序梗长约1.5厘米，密被短柔毛。坚果近球形， 长7-15毫米，无毛或仅顶端疏被长柔毛。
分布（Distribution）：产东北、河北、山西及陕西，生于海拔200-1000米的山地阴坡灌丛中。朝鲜、日本、蒙古、及俄罗斯也有。
用途（Use）：种子可食，并可榨油。
引自中国植物志英文版FOC Vol. 4 Page 288
Corylus heterophylla Fischer ex Trautvetter, Pl. Imag. Descr. 10. 1844.
榛 zhen| Betulaceae  | Corylus
Shrubs or small trees, to 7 m tall; bark gray. Branchlets pubescent and stipitate glandular, with white lenticels. Petiole slender, 1-2(-3) cm, sparsely pubescent; leaf blade oblong, elliptic, elliptic-obovate, broadly ovate, or obovate to suborbicular, 4-13 × 2.5-10 cm, papery, abaxially pilose along veins, adaxially glabrous, base cordate, margin irregularly and doubly serrate, usually lobed, apex mucronate to caudate; lateral veins 3-7 on each side of midvein. Male inflorescences 2-5 in a cluster, pendulous, slender, ca. 4 cm; bracts reddish brown, obovate, densely pubescent, apex acuminate from nearly truncate, apical portion of leaf. Female flowers 2-6 in a cluster; bracts campanulate, 1.5-2.5 cm, striate, densely pubescent and stipitate glandular near base, with triangular-ovate, entire or dentate lobes. Nut ovoid-globose, ca. as long as bracts, 0.7-1.5 cm in diam., apex villous. Fl. May-Jul, fr. Jul-Aug. 2n = 22.
Temperate broad-leaved forests, thickets on mountain slopes; 400-2500 m. Anhui, E and S Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, E Nei Mongol, Ningxia, Shaanxi, Shandong, Shanxi, NE Sichuan, Zhejiang [Japan, Korea, Russia (E Siberia)]
The hazelnut of commerce.
（责任编辑：徐晔春）