词条 | 红叶藓属 |
释义 | 红叶藓属(学名:Bryoerythrophyllum)该属约27种,广泛分布于南、北半球的温带及热带山区。中国已记录有13种及2个变种。植株较粗壮,散生或疏丛生,初期黄绿色,后期渐呈红褐色。茎单一或具分枝,密被叶;叶干时紧贴,卷缩或旋扭,湿时直立或背仰;呈长卵形、长椭圆形或狭长披针形。多数种类叶腋着生球形芽胞体。被红色假根。茎圆形,有大形的厚角组织构成的中轴;叶基部稍宽,披针形,渐尖,叶尖具不明显的细齿,下部全缘。叶片上部细胞方形或六角形,薄壁或厚壁,基部细胞方形,无色或红色。生长于海拔600-3200米林下土壤上。 中文学名:红叶藓属 拉丁学名:Bryoerythrophyllum 界:植物界 门:苔藓植物门 纲:藓纲 科:丛藓科 属:红叶藓属 种:27种 物种形态模式种:红叶鲜B. recurvirostrum (Hedw.)Chen 植株较粗壮,散生或疏丛生,初期黄绿色,后期渐呈红褐色。茎单一或具分枝,密被叶;叶干时紧贴,卷缩或旋扭,湿时直立或背仰;呈长卵形、长椭圆形或狭长披针形,先端渐尖或圆钝呈舌状,稀剑头形;叶边平展或中下部背卷,上部常具不规则粗锐齿,稀全缘;中肋粗壮,先端稍细,在叶尖部消失或突出叶尖具小尖头;叶中上部细胞绿色,呈圆一方形或不规则五至六边形,每一细胞具数个圆形、马蹄形或环状细疣;基部细胞较长大,呈不规则长方形,平滑,常带红色;有的种类叶缘细胞带呈红棕色,多稀疏而透明,形成明显的分化边。多雌雄异株。蒴柄直立,成熟时紫红色。孢蒴短圆柱形,黄褐色,老时呈红色;环带有分化;蒴齿短,直立;齿片呈线形,密被细疣;蒴盖具斜长喙;蒴帽兜形。多数种类叶腋着生球形芽胞体。 该属种类约27种 1.高山红叶藓 2.深色红叶藓 3.锯齿红叶藓 4.无齿红叶藓 5.钝头红叶藓 6.芽胞红叶藓 7.红叶藓 8.细叶红叶藓 9.云南红叶藓 10.东亚红叶藓(魏氏红叶藓) 分布范围分布于南、北半球的温带及热带山区。我国已记录有13种及2变种。 分种检索表1.叶先端完全回钝··························3.钝头红叶藓B. brachystegium 1.叶先端渐尖,或叶先端呈稍钝,但具小尖头···························2 2.叶片呈卵圆形或卵状披针形;叶缘无分化的边缘·························3 2.叶片呈舌形;叶缘具多列胞壁厚,且平滑无疣的细胞,构成明显分化的边缘··············9 3.叶片呈阔卵圆形;雌苞叶比普通叶较阔大;基部呈鞘状···········10.细红叶藓B. tenerrimum 3.叶片呈披针形;雌苞叶不分化·································4 4.叶边全缘且全部背卷·····································5 4.叶边仅下部全缘,背卷;上部多平展,且有锯齿··························7 5.叶片狭长,呈长卵状披针形,先端狭长渐尖···················9.大红叶藓B. rubrum 5.叶片较短阔,先端较钝,具短尖头································6 6.植株较细小;叶边先端全缘或具微齿,叶基狭且无分化···········8.红叶藓B. recurviroslrum 6.植株较粗壮;叶边先端具不规则的粗锯齿,叶基阔且与上部有明显分化····13.云南红叶藓B. yunnanense 7.植株纤细;叶片厚,疏生紧贴茎上,叶基无分化···············4.锯齿红叶藓B. dentatura 7.植株较粗壮;叶片或多或少倾立,叶基有分化···························8 8.叶边全缘;中肋粗壮,长达叶尖·····················5.无齿红叶藓B. gymnostomum 8.叶边中上部具粗锯齿;中肋至叶尖稍下即消失···························12 9.植株较矮小,茎高约0. 5-2cm叶片呈长椭圆状舌形,叶先端急尖,具小尖头··············10 9.植株长大,茎高约3--5cm;叶片呈长卵披针形,叶先端渐尖··········2.深色红叶藓B. atrorubens 10.叶边具规则的细锯齿,每齿由I个细胞或仅细胞尖部突出形成·········11.东亚红叶藓B. wallichii 10.叶边具不规则的粗锯齿,每1齿由多个细胞构成··························11 11.植株特细小,茎高仅5-7cm;无性芽胞缺如··················6.异叶红叶藓B. hostile 11.植株较大,茎高可达2cm以上;叶腋具多数呈总状花序似的卵球形芽胞体···7芽胞红叶藓B. pergemmascens 12.叶片上部渐呈披针形叶尖·························1.高山红叶藓B. alpigenum 12.叶片上部圆阔具小突尖头························12.伊春红叶藓B. yichunense |
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