C.S. of root of Zea mays

C.S. of stem of Helianthus annus(Sunflower Stem)

C.S. of stem of Helianthus annus(Sunflower Stem)

Pine One-year Stem

Pine Leaf two-needle

Pine Older Stem

Pine Older Stem

C.S. of leaf of Gladiolus sp.

C.S. of leaf of Gladiolus sp.

C.S. of mature roof of Ranunculus sp.

C.S. of stem of Zea mays

C.S. of stem of Zea mays

C.S. of leaf of Rosa sp.

C.S. of leaf of Rosa sp.