7.葉片疣呈卵圓形,葉邊明顯背卷,葉先端毛尖具突出的刺狀粗齒,中肋背面也具刺狀齒·········10
8.莖短小(長約7mm );葉中肋突出呈平滑而透明的短毛尖··········6.台灣牆蘚T. nankomontana
8.莖較長(長約20---50mm);中肋突出呈長毛尖······················9
9.中肋具無色透明,被疏齒的長毛尖;葉細胞呈5--6角形,胞壁薄····,···4.長尖葉牆蘚T. longimucronata
9.中肋具紅棕色而平滑無齒的毛尖;葉細胞呈多角狀圓形,胞壁較厚·········12.中華牆蘚T. sinensis
10.葉片較厚,由2層細胞構成;葉端毛尖呈紅棕色,密被粗刺狀齒········2.刺葉牆蘚T. desertorum
10.葉片較薄,僅具1層細胞;葉先端毛尖無色透明,疏被刺狀齒···············1111.植株較高大,(高達5--8cm),葉片呈倒卵狀匙形,基部狹長成鞘狀········10.山牆蘚T. ruralis
11.植株較矮小,(高約2---4cm ),葉片呈卵圓形,基部闊,不成鞘狀·············12
12.葉片背仰呈鐮刀狀彎曲;葉細胞呈多角狀圓形,胞壁稍增厚···········9.彎葉牆蘚T. reflexa
12.葉片不彎曲;葉細胞呈5-6角形,胞壁薄···················13
13.植株較粗壯;葉先端毛尖上密被尖齒··················8.大牆蘚T. princes
13.植株很細小;葉先端毛尖上被疏生刺狀齒···············1.齒肋牆蘚T. caninems
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