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An alphabetical listing of General terms and items. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Imbricate   A general term which applies under various conditions where one organ, or series of organs, overlaps another organ or series of organs; as in roof shingles. Immaculate   Without spots. Compare with maculate. Immersed   Growing beneath the surface of the water. Imperfect   Pertaining to a flower in which there is but one set of sex organs; i.e., those flowers which are either strictly male or strictly female; imperfect flowers occur in both monoecious and dioecious plants. Impressed   Sunken in; situated inferior to the surface of a blade, usually in reference to veins which are neither flush with nor raised above the surface of the blade or organ. Incised   Deeply cut or divided, usually irregularly. Included   Contained within, usually in reference to stamens, pistils, or capsules which do not surpass or exceed the calyx or corolla in length. Incurved   Curled or directed inward, such as hairs, the tips of which curve back toward the stem or surface of an organ. Indehiscent   Not opening at maturity; a term generally referring to some fruits. Indeterminate   Inflorescence whose terminal flowers open last. See determinate. Indument   Hairy or pubescent, usually rather heavy, covering. Indurated   Hardened. Indusium   A delicate flap or covering connected to the sorus in ferns. Inferior   In reference to an organ which appears subordinate to or lower than another similar organ; in reference to an ovary, at least the sides of which are adnate to the hypanthium. Infertile   Sterile; unable to produce seeds. Inflated   Blown up or dilated as if by air; bladder-like. Inflexed   Bent inward. Inflorescence   The discrete flowering portion or portions of a plant; a flower cluster. Infraspecific   Pertaining to any taxon within a species, such as a subspecies, variety, or form. Compare to interspecific and intraspecific. Infructescence   The fruiting inflorescence. Back to top Inrolled   Said of leaf margins rolled inward toward the midrib. Insipid   Without taste or flavor. Internode   That portion of the stem other than the node; the distance between two nodes. Interspecific   Among species or between two species. Compare to infraspecific and intraspecific. Interstitial   That space which is between or among two or more discriminate structures; in the Rosaceae family, referring to the small leaflets between two large leaflets on the rachis. Intraspecific   Referring to a taxonomic entity with a species. Compare to infraspecific and interspecific. Intrastaminal   Among the stamens. Introrse   Turned inward or toward the axis. Invaginated   Sunken inwardly; used in connection with the achene in Carex. Involucel   A secondary involucre, such as that subtending an umbellet in the Apiaceae family. Involucral   Pertaining to an involucre. Involucrate   Having an involucre. Involucre   A whorl or imbricated series of bracts, often appearing somewhat calyx-like, typically subtending a flower cluster or a solitary flower. Involute   Leaf margins rolled toward the upper surface of the midrib. Irregular   Referring to a calyx or corolla which is bilaterally symmetrical, capable of being divided into two equal halves along only one plane. Same as zygomorphic. Isodiametric   Shapes with sides or diameters of nearly equal lengths. Back to top