Comarum palustre (marsh cinquefoil) leaf paradermal section intercepting spongy mesophyll, palisade mesophyll, and vein

Comarum palustre (marsh cinquefoil) leaf paradermal section intercepting spongy mesophyll, palisade mesophyll, and vein

Verbascum (mullein) dendroid trichome.

Verbascum (mullein) dendroid trichome.

ubus (bramble) spiral primary cell walls. Lersten and Curtis. 1976. Canadian J. Bot. 55: 128-132.

ubus (bramble) spiral primary cell walls. Lersten and Curtis. 1976. Canadian J. Bot. 55: 128-132.

Fragaria (strawberry) spiral primary cell walls. Lersten and Curtis. 1976. Canadian J. Bot. 55: 128-132.

Fragaria (strawberry) spiral primary cell walls. Lersten and Curtis. 1976. Canadian J. Bot. 55: 128-132.

Pine (Pinus) stem cross section with tannin cells in phloem

Pine (Pinus) stem cross section with tannin cells in phloem

Populus deltoides (cottonwood) cleared leaf showing stomate developmental stages on the abaxial epidermis.

Populus deltoides (cottonwood) cleared leaf showing stomate developmental stages on the abaxial epidermis.

Populus deltoides (cottonwood) leaf clearing with focus on lower epidermis showing stomates in all stages of development.

Populus deltoides (cottonwood) leaf clearing with focus on lower epidermis showing stomates in all stages of development.

Populus tremuloides (quaking aspen) leaf clearing showing abaxial epidermis with developmental stages of stomates.

Populus tremuloides (quaking aspen) leaf clearing showing abaxial epidermis with developmental stages of stomates.

Urtica dioica (stinging nettle) abaxial epidermis, stomates, and vascular bundles.

Urtica dioica (stinging nettle) abaxial epidermis, stomates, and vascular bundles.

Populus tremuloides (quaking aspen) leaf clearing with focus on lower epidermis with stomates and cuticular ridges.

Populus tremuloides (quaking aspen) leaf clearing with focus on lower epidermis with stomates and cuticular ridges.

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