太白山系秦岭主峰,在3000—3400米之间分布着落叶松(Larix chinensis)林。落叶松—粗叶泥炭藓(Sphagnum squarrosum)林则属落叶松林中的一个类型。由于林内粗叶泥炭藓的强烈繁生,地表变得非常潮湿,下面形成很厚的冰冻层。在这种条件的作用下,落叶松—粗叶泥炭藓林及其组成该类林的种群,都形成了某些显著的特征,进一步的发展趋向也比较明显。本文仅对此情况作一初步的论述。目前,落叶松—粗叶泥炭藓林分布面积不大,多位于阴坡和半阴坡。它是由落叶松—藓类(镰刀藓 Drebanocladus lycopodioides、塔藓 Hylocomium proliferum、乳头曲尾藓 Dicrana thelinotum 等)林发展而来的。由于这些藓类在地面上的繁生,不但本身 The Taibai Mountains are the main peaks of the Qinling Mountains. Larix chinensis forests are distributed between 3000 and 3400 meters. Larch - Rough Sphagnum squarrosum Linnaeus is a type of larch forest. Due to the strong growth of the coarse-leafed peat moss in the forest, the surface becomes very moist and a thick layer of ice forms beneath it. Under the condition of this kind of conditions, larch - coarse leaf peat moss and its composition of the forest species have formed some significant features, further development trend is also more obvious. This article only makes a preliminary discussion of this situation. At present, larch - coarse leaf peat moss distribution area is not large, mostly in the shady and semi-shady. It is developed from larch-moss (Drebanocladus lycopodioides, Hylocomium proliferum, Dicrana thelinotum, etc.). Because of the complexity of these moss on the ground, not only by itself