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灰毛含笑(Michelia foveolatavar,cinerascens),别名灰绒含笑、大叶含笑。生长速度快,年生长量50～80厘米;适应性强,在我国淮河以南地区均可正常越冬度夏;吸尘、抗污染性强,适用于城市行道树及厂矿绿化。花朵密集,花苞硕大,花色洁白,花香浓郁;经嫁接可矮化植株,供盆栽观赏。常绿乔木,高15～30米,胸径达80厘米,树皮灰色,枝上瘤孔明显;叶芽、幼枝、叶柄和花芽、花梗等均密被银白色短绒毛。叶厚革质,长椭圆形或卵状长圆形,长15～23厘米,宽6～11厘米;叶面亮绿色,有光泽,叶背被银灰色绒毛。花淡黄色或乳黄色。聚合果长7～12厘米。花期4、5月,果熟期10、11月。灰毛含笑为金叶含笑(M.foveolata)的变种,模式标本采自浙江庆元县。它与金叶含笑的区别在于:金叶含笑的芽、幼枝、叶柄、叶背、花梗均密被红褐色短绒毛,叶面为黄绿色,而灰毛含笑的叶面为深绿色。
Gray hair smile (Michelia foveolatavar, cinerascens), alias gray cashmere smile, big leaf smile. Fast growth rate, the annual growth of 50 to 80 cm; adaptability, in the south of the Huaihe River in our country can be normal winter over the summer; vacuum, strong anti-pollution, suitable for urban sidewalk trees and factories green. Flowers dense, huge flower buds, flowers white, rich floral; by dwarf plants can be grafted for potted ornamental. Evergreen trees, high 15 to 30 meters, diameter 80 cm, gray bark, branches obvious tumor; leaf buds, young branches, petiole and flower buds, peduncle, etc. are densely silver white fleece. Leaves thick leathery, oblong or ovate oblong, 15 to 23 cm long, 6 to 11 cm wide; leaf surface bright green, shiny, leafy back hairy silver gray. Flowers pale yellow or milk yellow. Aggregate fruit length 7 ~ 12 cm. Florescence 4, May, fruit maturity 10, November. Gray hair smile for the gold leaf smile (M.foveolata) variants, the model specimens were collected from Zhejiang Qingyuan County. The difference between it and the gold leaf smile lies in that the buds, young shoots, petioles, leaf backs and pedicels of the golden leaf are densely covered with reddish brown short nap, the leaf surface is yellowish green, while the gray hairy smile is dark green.