摘要
报道了内蒙古清水河黄土丘陵地区发现的紫萼藓科1新变种——缨齿藓菱形变种[Jaffueliobryum wrightii （Sull.） Thér.var.rhombicum X.L.Bai ＆ Sarula],该变种与干旱山地岩面生境中的原变种缨齿藓[Jaffueliobryum wrightii （Sull.） Thér.]相似,生境的变化导致其形态发生变化,主要表现在上部细胞菱形和细胞壁背部强烈加厚,未分化的叶上部边缘细胞、中肋横切面细胞不分化,叶片长0.7～0.8 mm,毛尖长0.8～1.3 mm.文中对缨齿藓及其新变种的形态学特征,分布和生境进行了描述,并提供了显微照片,另外,列出了缨齿藓属5个种的检索表.
The moss Jaffueliobryum wrightii （Sull.） Thér.var.rhombicum X.L.Bai ＆ Sarula is described as a new variant species based on a collection from shady slopes in loess hilly regions,Qingshuihe County,Inner Mongolia.It is distinguished from Jaffueliobryum wrightii （Sull.） Thér.by some significant char acteristics.J.wrightii var.rhombicum appeared that upper laminal cells rhomboidal and dorsally strongly thick walled,marginal cells not differentiated,cells of costal transverse section are not differentiated,non bulging ventral epidermis cells,lamina 0.7-0.8 mm in length,awn 0.8-1.3 mm in length.Characteristic descriptions and geographic distribution map of the two species are provided.Moreover,an identification key for the species recognized in Jaffueliobryum is also provided.
出处
《西北植物学报》
CAS
CSCD
北大核心
2014年第7期1489-1495,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金(30870160
31170497)
国际(地区)合作与交流项目(31011120089)
关键词
缨齿藓原变种
缨齿藓菱形变种
缨齿藓属
紫萼藓科
内蒙古
中国
Jaffueliobryum wrightii
Jaffueliobryum wrightii var.rhombicum
Jaffueliobryum
Grimmia
Inner Mongolia
China
