八种马先蒿属叶的解剖学研究及分类学意义

本文对马先蒿属八种植物的叶进行了解剖学研究。结果表明：叶表皮均由单层细胞组成，具有较厚的角质层；细胞壁加厚程度高；下表皮上分布许多 腺性乳头细胞及非腺性表皮毛；叶为异面叶，栅栏组织多为一层，栅栏组织胞间隙发达，在下表皮内有较大的储气室；叶中脉维管组织排列为马蹄形，半扇形，木质部特别发达，其中具较大裂隙腔。八种植物既具有高山植物特征又具有湿生物特点。从叶结构看，这八咱植物间存在明显的区别，具有一定的

AN ANATOMICAL STUDY AND TAXOONMICAL SIGNIFCANCE ON EIGHT SPECIES OF PEDICULOAR

We anatomizes of Pedicuoar.It was shown thae epidrmis is made single-layer cells andthicker cuticle. The cell is highly thicker, The lower epidermis has many gland teat cell and uinglandular hairs. The leaves is comprised palisades and spongy parenchyrne, Which most of palisadetissue has one layer and developed gap,Under the lower epidermis has a digger stomatic chember.The arramgment of mesophyllous horseshoe, Semi-scullop. Xylem is specially developed, It hasdigger crack cavity.Both tropophyte and aerophyta are the trait of eight SPecies. From consructure of the leaves,the eight species plants advious difference and it specifcally taxonomic sense.Therebg,it can provide specific basis for systematics.