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Image from Blair’s Osteographica Elephantina (1710) showing 6-toed elephant.
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Monocot and dicot plants differ mainly in plant structure; however, both have three types of plant tissue – vascular, ground, and dermal – and indeterminate growth due to the presence of apical meristems. External differences include leaf venation – monocots have parallel veins while dicots’ veins are netted. The roots of monocots contain a larger area of ground tissue in the cortex, with the vascular tissue composed of xylem and phloem centered in the middle of the cross-section. Dicot roots have a ring of cambium tissue between the layers of xylem and phloem. Dicot leaves have a layer of parenchyma cells under the upper epidermis, with small vascular bundles in the spongy mesophyll layer between the layer of parenchyma cells and the lower epidermis. Monocot leaves are more condensed to preserve water and have larger vascular bundles. The vascular bundles in monocot stems are scattered throughout the cortex while those in the dicot stems are organized in rings, thus allowing secondary growth. In dicot stems, layers of secondary xylem and phloem are added to either side of the layer of vascular cambium tissue between those of the xylem and phloem. Both monocots and dicots have cotyledons, however, monocots have one while dicots have two inside of their seeds.
(via theherbarium)
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Coromandel Owl, Strix Coromandra - Illustrations of Indian Zoology (1830-35)
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‘The butterflies of the British Isles.’ 1906
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Edward Burne Jones, Drawing of Wings
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Compendio de Anatomia Descriptiva
Dr. J.A. Fort
Fernando Aldape Barrera - Editor, 1976. México.
” … ¡y haremos más libros y más baratos!”
(via fuckyeahmedicaldiagrams)
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Transfer of printed image onto text of opposing page; snakes!
From p. 334 of The Complete Works of Oliver Goldsmith: Animated Nature, by Oliver Goldsmith (1825). [Here]
