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光皮桦,桦木科,乔木,树皮淡褐色,老则呈红褐色,平滑不裂;叶卵形或卵状矩圆形,常两面有毛,下面密生油腺,侧脉12～14对;果序单生,下垂,长3～9厘米,果苞侧裂片短而直伸,果翅宽为果的1～2倍;林龄3年即开花结果,花期3～4月,本地区一般5月中旬果熟(高山5月下旬)。由于该树种生长迅速,年生长量70～120厘米,适应性广,耐干旱瘠薄,材质细密坚硬,用途广,本地区在2004年以来广泛种植,以替代枫香对杉松迹地的更新。1.种子保存5月采摘的种子,采摘后立即带回家平铺在地面,晾至7成干,用保鲜膜袋密封盛装,放在冰箱冷藏室内,待来年春季播种。
Light birch, birch family, arborvitae, bark light brown, old reddish brown, smooth and not split; leaf oval or ovate oblong, often both sides hairy, below the dense oil glands, lateral veins 12 to 14 pairs ; Fruit order solitary, drooping, 3 to 9 cm long, bractlets short and straight extension, fruit wing width of 1 to 2 times the fruit; 3 years of age that flowering results, flowering from March to April, the region generally Mid-May ripe fruit (mountains in late May). As the rapid growth of the tree species, the annual growth of 70 to 120 cm, wide adaptability, drought-resistant barren, hard and fine material, wide use, the region has been widely planted since 2004 to replace Liquidambar fir firland to update. 1. Seeds stored May picked the seeds, picked immediately after the home tiled on the ground, dry to 70% dry, sealed with plastic wrap bags, on the fridge freezer, until the spring planting.