Five species of the genus Poa L. from (Poaceae) were collected and studied in
Lattakia, they are : P. annua ، P.infirma ، P. pratensis ، P. bulbosa ،P. nemoralis.
This study put data base of the morphological features which included : habit, leaves
,
ligule, the structure of the inflorescence , spikelet, floret, micro-morphological
characteristics which contained the epidermal structure of abaxial leaf surface, and the
difference between costal and inter-costal zones of the 5 species, studying of pollen grain
clarified the similarity in shape but there was a simple difference in measurements . Then ,
data from micro and macro morphological study were used to made a Dendrogram by
using Statistica . The dendrogram showed the linkage of two annual species P. annua ،
P.infirma in a cluster , every one of three another species had his specific cluster , P.
nemoralis was closer to the annual species .
