Anatomical and micromorphological properties of holoparasite Orobanche gracilis and Orobanche fuliginosa (Orobanchaceae) species

Holoparasite Orobanche gracilis Sm. and O.fuliginosa Reut. ex Jord. were micromorphologically and anatomically examined. In anatomical studies, the transverse and surface section of the root, stem and leaf of species were examined to determine interspecific variation. Studied species have non-photosynthetic scale leaves. There are glandular and eglandular trichomes in the leaf and stem of studied species. The glandular trichomes are capitate type in O. gracilis and capitate and peltate types in O. fuliginosa. The seed surface types are reticulate. The depth of anticlinal walls are medium or remarkable in the seed of O. gracilis and remarkable in the seed of O. fuliginosa.