【摘要】 首次报道了虾藓科植物和虾藓原亚种在河南的分布。研究表明:(1)虾藓原亚种的主要识别特征——植株扁平带状,倒悬于陡峭岩壁,绿色至黄绿色,有光泽;叶长刀形,紧密覆瓦状排成2列,中肋突出,侧叶折合,中上部细胞为不规则的圆角多边形、强烈厚壁,分化边明显,沿中肋延伸成狭背翅;雌雄异株;雌苞叶叶尖细长、弯曲,在茎顶向两侧张开,形似虾的触角。(2)虾藓有明显的雌性偏向。(3)虾藓是冰河前期和间冰期的孑遗种,其现代分布模式呈现出广泛而显著间断的特征,可作为研究植物区系的指示植物。更多还原

【Abstract】 This is the first report to Bryoxiphium norvegicum subsp. norvegicum(Brid.) Mitt. and the family Bryoxiphiaceae in Henan Province. The study showed that:(1)B. norvegicum subsp. norvegicum is characterized by flat banded plants, pendent on the steep rock, green to yellow green, shiny; sword-shaped, keeled-conduplicate leaves overlapping in two rows, with a narrow dorsal wing along costa; distal and medial laminal cells are firm-walled, irregularly rounded polygonous, marginal cells are narrow and elongate. Perichaetial leaves are long, gradually narrowed to a long, flexuose awn, being like the antennules of shrimp.(2)The female-biased sex ratio is striking high in B. norvegicum.(3)The species is a preglacial and interglacial relicspecies, with widespread but remarkable disjunct distribution. The species may be viewed as an indicator in floristic research.更多还原