There are 980 species belonging to 152 families and 579 genera in Bijiashan Park, among them, 417 species are introduced plants belonging to 88 families and 262 genera, 563 species are wild vascular plants belonging to 129 families and 382 genera, including 18 families, 27 genera and 49 species of ferns, 7 families, 11 genera and 16 species of gymnosperms, and 129 families, 541 genera and 915 species of angiosperms.
This paper reports the results of a preliminary survey of the plant resources of this mountain which revealed 184 families, 629 genera and 1209 species of wild vascular plannts, including 36 families, 67 genera and 124 species of Pteridophytes, 4 families, 5 genera and 5 species of the Gymnospermae, 144 families, 557 genera and 1080 species of the Angiospermae.
as well as 282 common higher plant species (including 8 species of Bryophyta, 9 species of Pteridophyta, 3 species of Gymnospermae and 262 species of Angiospermae) belonging to 72 families and 183 genera.
There are 64 families, 114 genera and 198 species, including 7 families, 8 genera and 19 species of peridophyte, 2 families, 2 genera and 2 species of gymnosperme, 55 families, 104 genera and 177 species of angiospermae.
In the wild rare and endangered plant resource investigation of Qingyuan city from June 1998 to June 2000, 41 rare and endangered plant species were found, they include 4 pteridophyte species belonging to 3 genera, 3 families, 7 ymnospermous species belonging to 7 genera , 5 families and 30 angiospermous species belonging to 28 genera, 22 familis.
Avaliable data show that the primitive angiospermous pollen grains of the genus Stellatopollis are major elements of early angiospermous microflora and useful in precisely dating and correlating Early Cretaceous sediments.
Among the angiospermous pollen grains obtained from the subsurface samples of the Baihedong Formation in the Sanshui Basin, more than 20 species assigned to 11 genera are described and documented, with proposal of one new species, Retimonocolpites acutus.
The putative mechanisms of nickel hyperaccumulation are considered in several representatives of angiosperm plant families.
representing leaves of a dicotyledonous angiosperm is presented with a brief description of the fossil material.
Together with other 73 sequences ofCHS collected from EMBL database and literature, these sequences, which embrace 19 families of gymnosperm and angiosperm, have been analyzed for their phylogenetic relations by parsimony method.
Many insects have coevolved with certain angiosperm taxa to act as pollinators.
Protection of lodgepole pines from mass attack by mountain pine beetle, Dendroctonus ponderosae, with nonhost angiosperm volatil
In angiosperms, the endemic genera are mostly relicts, and are represented in all lineages in the "Eight-Class System of Classification of Angiosperms", and endemism can be found in almost every evolutionary stage of extant angiosperms.
Relationships of the Gymnosperms and Angiosperms Estimated on the Basis of Data Obtained by Biochemical Methods
The angiosperms apparently originated from a progymnospermous ancestor or branched from the main stem of gymnosperms prior to its division into the recent phyla.
No common ancestor of all subclasses of the angiosperms has been identified.
This method can be used to investigate changes in the ratio of various hormonal forms of auxins that differ in their physiological activity in reproductive organs of angiosperms at various stages of reproduction.