Fourth stage in plant cell division: Protophase 4; "The nuclear membrane and the nucleolus have disappeared,…
Fifth stage in plant cell division: Metaphase; "The metaphase, where the longitudinal halves of the…
Sixth stage in plant cell division: Anaphase; "The anaphase, or movement of the chromosomes toward the…
Seventh stage in plant cell division: Telophase; "Telophase where the chromosomes have begun to spin…
Eighth stage in plant cell division: "The connecting fibers have spread out and come into contact with…
Ninth and final stage in plant cell division: "A nuclear membrane has been formed about each daughter…
"Formation of endosperm in the embryo-sac of Agrimonia Eupatorium. Cell-walls are being formed between…
"Free cell formation of spores in the ascus of Erysiphe communis. A, ascus with single nucleus; C, cytoplasm;…
"Various stages of cell multiplication by budding of Saccharomyces cerevisiae." -Stevens, 1916
"Nucleus dividing by simple constriction. From the lining of the embryo-sac of Vicia faba." -Stevens,…
"Diagram showing the evolution of tissues from the primordial meristem down to the beginning of cambial…
"Two epidermal cells in cross section showing thickened outer wall differentiated into three layers,…
"Cross section of a portion of leaf of Ficus elastica showing the multiple epidermis from e to a inclusive;…
"Diagram to show the topography and character of the tissues that evolved from the primary meristems.…
Developmental stages of collenchyma: "1 and 2, cross and longitudinal section of a collenchyma cell…
Developmental stages of collenchyma: "3 and 4, longitudinal and cross sections of the same cell at a…
Developmental stages of collenchyma: "5 and 6, longitudinal and cross sections of a mature cell. The…
First developmental stage of stone cells: "1, in the primary meristem condition." -Stevens, 1916
Second developmental stage of stone cells: "2, the cells have enlarged and the walls have begun to thicken…
Third and final developmental stage of stone cells: "3, The walls are completed. The primary wall is…
Developmental stages of bast fibers: "1 and 2, cross and longitudinal sections of primary meristem cells…
Developmental stages of bast fibers: 3 and 4, cross and longitudinal sections of meristem cells becoming…
Developmental stages of bast fibers: "5, longitudinal section of completed bast fibers. In 5 the stippling…
"Portion of a cross section of a root of Allium ascalonicum. h, large central, tracheal tube; i, xylem,…
"Diagram to show different plans in the distribution of bast fibers. A, bast a continuous cylinder in…
First developmental stage of sieve tubes, companion cells, and phloem parenchyma. "A, a and b, two rows…
Second developmental stage of sieve tubes, companion cells, and phloem parenchyma. "B, c, companion…
Third developmental stage of sieve tubes, companion cells, and phloem parenchyma. "The pits in the cross-walls…
"Stages in the development of the elements of the xylem. A, progressive steps in the development of…
Stages in the development of the elements of the xylem. "B, stages in the formation of tracheids from…
Stages in the development of the elements of the xylem. "C, steps in the development of wood fibers…
Stages in the development of the elements of the xylem. "D, steps in the formation of wood parenchyma…
"Diagram showing how the vascular bundles anastomose around the medullary rays. The gaps represent the…
Types of vascular bundles: "A, the concentric type, with xylem, k, surrounding the phloem, h." -Stevens,…
Types of vascular bundles: "B, the collateral type, with phloem, h, standing in front of the xylem,…
Types of vascular bundles: "C, a portion of the radial type, shown complete in D, where the part outlined…
"Gleichenia pubescens: transverse section of stem, showing the protostele." -Stevens, 1916
"Adianium pedatum: transverse section of stem, showing the amphiphloic siphonostele." -Stevens, 1916
"Pteris aquilina: transverse section of stem, showing the polystele." -Stevens, 1916
"Diagram showing additions to the primary tissues through the activity of the cambium and phellogen…
"Diagram showing the relation of this year's leaves to the wood of the current year." -Stevens, 1916
"Portion of a cross section throughout the stem of Dracaena marginata. P, parenchyma of cortex. V, meristematic…
"Diagram showing some types of unusual growth in thickness. A, cross section through a four-year-old…
"Diagram showing some types of unusual growth in thickness...B, cross section of stem of species of…
"Diagram showing some types of unusual growth in thickness...C, portion of a cross section of stem of…
"A, cross section through upper half of leaf of Pyrus Japonica, showing cutinized layer of the outer…
A cross section through the upper half of a Russian olive leaf, showing a "cutinized layer of the outer…
"C, portion of cross section of submerged stem of Nymphaea odorata, where there is no cutinized layer,…
"A, portion of cross section of leaf of Avicennia growing in salty soil; outer wall of epidermis very…
"C, cross section through upper half of petal of Japan Quince." -Stevens, 1916
"D, upper, and E, lower epidermis of leaf of Hibiscus moscheutos." -Stevens, 1916
"Different forms of epidermal outgrowths. 1, hooked hair from Phaseolus multiflorus; 2, climbing hair…
"Multiple epidermis of leaf of mangrove in cross section. This serves as a water reservoir, and the…
"Cross section of yellow poplar wood. E, early; L, late growth; m, medullary ray." -Stevens, 1916