1 of the 2 major groups of angioperms; Grass plants. Have one cotyledon (Ex: lillies, orchids, palms)
Refers to all angiosperms other than monocots; characterized by having two cotyledon (Ex: sunflowers, roses, oaks, mustards)
The part of the flower producing the pollen, composed usually of anther and filament; collectively the stamens make up the androecium
the region of the carpel that serves as a receptive surface for pollen grains and on which they germinate
A slender column of tissue that arises from the top of the ovary and through which the pollen tube grows
the enlarged basal portion of carpel or of a gynoecium composed of fused carpels; a mature ovary, sometimes with other adherent parts is a fruit
A structure in seed plants containing the female gametophyte with egg cell, all being surrounded by the nucellus and one or two integuments; when mature, an ovule becomes a seed
One of the outermost flower structures, a unit of the calyx; sepals usually enclose (protect) other flower parts in the bud
The spore-producing, diploid (2n) phase in a life cycle characterized by alternation of generations
In plants that have alternation of generations, the haploid (n), gamete-producing generation, or phase.
(OR microspore mother cell) A cell in which meiosis will occur, resulting in four microspores; in seed plants, often called a pollen mother cell
(OR megaspore mother cell) A diploid cell in which meiosis will occur, resulting in the production of four megaspores
In heterosporous plant, a haploid (n) spore that develops into a female gametophyte; in most groups, megaspores are larger then microspores
megagametophyte (female gametophyte)
female gametophyte, located within the ovule of seed plants (7 cells - 8 nuclei)
The outermost layer or layers of tissues enveloping the nucellus of an ovule; develops into the seed coat
In the ovules of seed plants, the opening in the integuments through which the pollen tube usually enters
three (sometimes more) cells of the mature embryo sac, located at the end opposite the micropyle
Two short lived cells lying close to the egg in the mature embryo sac of the ovule of flowering plants
Two nuclei (usually); one derived from each end (pole) of the embryo sac, which becomes centrally located; they fuse with a male nucleus to form the primary (typically 3n) endosperm nucleus.
In male gametophytes, or pollen grains, of seed plants, the cell the develops into the pollen tubes
The fusion of the egg and sperm (resulting in a 2n fertilized egg, the zygote) and the simultaneous fusion of the second male gamete with the polar nuclei (typically resulting in a 3n primary endosperm nucleus); a unique characteristic of all angiosperms
A tissue, containing stored food, that develops from the union of a male nucleus and the polar nuclei of the central cell; it is digested by the growing sporophyte either before or after maturation of the seed; found ONLY in angiosperms
A structure at the base of the embryo in many vascular plants. In some plants, it pushes the embryo into nutrient rich tissue of the female gametophyte.
A proteinaceous material, usually in the form of small granules, occurring n the outermost cell layer of the endosperm of wheat and other grains
Cells derived from the apical meristems and primary meristematic tissues of root and shoot; as apposed to secondary tissues derived from cambium; primary growth results in an increase in length.
Tissues other than the vascular tissues, the epidermis, and the periderm; also called fundemental tissue;
Pertains to any plant tissue that consists of giving rise to conducting tissue; xylem, phloem, vascular cambium
Meristems that give rise to secondary tissues; the vascular cambium and cork cambium
ground tissue; living, generally thin-walled cells of variable size and forum; the most abundant kind of cells in plants
ground tissue, supporting tissue, elongated living cell with unevenly thickened, nonlignified primary cell wall
Ground tissue; thick, lignified secondary wall having many pits. Are variable in form but typically are not very long; they may or may not be living at maturity.
Vascular tissue: most of the water and minerals are conducted through it; characterized by presence of tracheary elements
Vascular tissue; an elongated, thick-walled conducting and supporting cell of xylem. it has tapering ends and pitted walls without perforations, as contrasted with a vessel element. Found in nearly all vascular plants.
Vascular tissue; one of the cells composing of a vessel; also called a vessel member
A tubelike structure of the xylem composed of elongate cells (vessel elements) placed end to end and connected by perforations. It's function is to conduct water and minerals through the plant body. Found in nearly all angiosperms and a few other vascular plants.
vascular tissue; the food conducting tissue of vasular plants, which is composed of sieve elements, various kinds of parenchyma cells, fibers, and sclereids.
Sieve Tube Elements
One of the component cells of a sieve tube; found primarily in flowering plants and typically associated with a companion cell; also called Sieve tube member
A specialized parenchyma cell associated with sieve tube element in angiosperm phloem and arising from the same mother cell as the sieve-tube element
A single layer of cells forming a sheath around the vascular region in roots and some stems; the endodermal cells are characterized by a Casparian strip within radial and transverse walls. In roots and stems of seed plants, the endodermis is innermost layer of the cortex
A tissue characteristic of roots that is bound externally by the endodermis and internally by the phloem
A root that arises from another, older root; also called a branch root, or secondary root, if the older root is the primary root
A lateral outgrowth from the apical meristem that will eventually become a leaf *Formed when the plane of cell division in the inner tunica layer shifts from anticlinal to periclinal
The ground tissues (parenchyma) of a leaf, located between the layers of the epidermis; mesophyll cells generally contain chloroplasts
A leaf tissue composed of columnar chloroplast bearing parenchyma cells with their long axes and right angles to the leaf of the surface
A minute opening, bordered by guard cells, in the epidermis of leaves and stems through which gases pass; also used to refer to the entire stomatal apparatus - the guard cells plus their included pore. Lower epidermis, CO2 uptake and water release.
In plants, growth derived from secondary or lateral meristems, the vascular cambium and cork cambium; secondary growth results in an increase in girth, and is contrasted with primary growth, which results in an increase in length
growth originating in the apical meristems of shoots and roots, as contrasted with secondary growth
A plant that normally reqauires two growing seasons to complete its life cycle; flowering and fruiting in its second year
A cylindrical sheath of meristematic cells, the division of which produces secondary phloem and secondary xylem.
Outer protective tissue that replaces epidermis which it is destroyed during secondary growth, includes cork, cork cambium, and phelloderm
The lateral meristem that forms the periderm, producing cork (phellem) toward the surface (outside) of the plant and phelloderm toward the inside; common in stems and roots of gymnosperms and woody angiosperms.
A secondary tissue produced by a cork cambium; made up of polygonal cells, non living at maturity; with suberized cell walls, which are resistant to the passage of gases and water vapor; the outer part of the periderm
An initial in the vascular cambium that gives rise to the ray cells of the secondary xylem and phloem
The first formed wood of a growth increment; it contains larger cells and is less dense than the subsequently formed late wood. Replaces "spring wood"
The last part of the growth increment formed in the growing season, it contains smaller cells and is denser than the early wood; replaces "summer wood"
Unisexual; having the male and female (staminate and ovulate) elements on different individuals of the same species
Inferior Ovary (inferior flower)
An ovary that is completely or partially attached to the calx; the other floral whorls appear to arise from the ovary's top
Can be divided into two equal halves in more than one longitudinal direction, also called regular
Capable of being divided into two symmetrical halves only by a single longitudinal plane passing through the axis
A horizontal stem (may be above or below ground) that terminates in a bud, for vegetative production