Investigations on a monotypical genus: pentapleura hand.-mazz. (lamiaceae)
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The genus Pentapleura Hand.-Mazz. (Lamiaceae) is represented by only one species Pentapleura subulifera Hand.-Mazz and distributed in southeast of Turkey and north Iraq. The stem and leaf of the species were examined for anatomical studies. The stems are rectangular in shape and the leaves are equifacial type. The micromorphologic properties of trichomes, nutlets and pollens were described. Trichomes can be divided into two types as nonglandular and glandular. Also, glandular trichomes are of two types as peltate and capitate type. The capitate trichomes are divided into four subtypes. The nutlets are obovoid shaped and they have the prominent undulate-ridged ornamentation. The pollen grains of the species are hexacolpate, suboblate to subprolate in shape and they have perforated and microreticulate exine ornamentation.