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Herbivory (herbivorous)
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Feeding on plants (referring to an animal that feeds on plants). |
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Herkogamy (herkogamous)
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In bisexual flowers, the placement of the male (staminate) and female (pistillate) flowers in different positions within the same plant; for example, a heterostylous species is also a herkogamous species. Approach herkogamy is when the sigma protrodes beyond the stamens and reverse herkogamy is when the anthers protrude beyond the stigma. In the first case, the pollinator touches the stigma before it reaches the anthers and in the second place the pollinator touches the anthers before it reaches the stigma. |
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Hermaphrodite
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See bisexual; in the Mimosaceae, referring to the presence of both staminate and pistillate flowers in the same inflorescence. |
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Hesperidium
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A berrylike fruit with tough or coriaceous outer rind, e.g., the fruit of most species of Citrus (Rutaceae). |
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Heteranthery (adj. = heterantherous)
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A flower that contains two types of pollen, one that germinates and is found in anthers and another that does not germinate and serves as a pollinator reward. |
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Heteranthery (adj. = heterantherous)
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A flower that contains two types of pollen, one that germinates and is found in anthers and another that does not germinate and is found antherodes; the latter serves as a pollinator reward. |
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Heteranthery (heterantherous)
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Heteromorphic stamens of a species of Swartzia from an unvouchered plant from Amazonas, Brazil. This is also called heteranthery and when there are only two variations in the morphology of a structure it can also be referred to as dimorphic. This species is apocarpic as evidenced by the separate styles, a rare occurence in legumes which in general have species with a single pistil. Same as differentiated anthers. |
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Heterochlamydeous
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Referring to a flower with differentiated calyx and corolla; same as biseriate perianth. Compare with monochlamydeous. |
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Heteromorphic
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Referring to structures or organs within a species or individual that differ in form or size; e.g., the simple juvenile and pinnately compound leaves of Syagrus inajai (Arecaceae). Compare with dimorphic and monomorphic. |
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Heteromorphic stamens
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Stamens of two distinct types; one type usually bears fertile pollen and the other type bears sterile or fodder pollen; e.g., Lecythis zabucajo (Lecythidaceae) and species of Senna (Fabaceae). |
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Heterophylly (heterophyllous)
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Referring to species or individuals with leaves that differ in size or shape. See heteromorphic. |
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Heterospory (heterosporous)
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Producing two different kinds of spores; e.g., those giving rise to the microgametophytes and megagametophytes of Selaginella, Isoetes, and the flowering plants and the |
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Heterostyly (heterostylous)
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A condition in which the style and stamen lengths vary among individuals of the same species; e.g., in Coussarea racemosa (Rubiaceae), with flowers with long styles and short stamens and flowers with short styles and long stamens in different trees of the same population. The long-styled flowers are called pin flowers and the short-styled flowers are called thrum flowers. |
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Heterotroph (heterotrophic)
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Unable to synthesize organic compounds from inorganic substrates, i.e., this kind of plant does not photosynethesize and is not green in color because it lacks chlorophyll. |
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Higher order venation
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All venation smaller in diameter than tertiary venation. |
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Hilum (hilar)
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A scar on the seed indicating where the funicle was attached. |
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Hippuriform
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Shaped like a horse’s tail; e.g., the inflorescences of species of Oenocarpus (Arecaceae). |
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Hispid (diminutive = hispidulose)
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With dense, stiff trichomes. |
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Hoja imparipinnada
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Se refiere a una hoja compuesta que posee un foliolo impar en la porción distal. Comparar con paripinnada |
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Hoja paripinnada
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Se refiere a una hoja compuesta que posee un par de foliolos en la porción distal. Equivalente a bipinnada. Comparar con imparipinnada |
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Holoparasite
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An achlorophyllous plant that derives all of its nutrition from its host; e.g., species of Balanophoraceae and Rafflesiaceae. |
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Holotype
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A single specimen designated by the author of the species to represent that species. If there are duplicates of that specimen, they are called isotypes. |
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Homoecy (adj. = homoecious)
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A species that bears only bisexual flowers on each plant. |
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Homoecy (homoecious)
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Referring to a species that bears only bisexual flowers on each plant. |
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Homospory (homosporous)
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Producing a single kind of spore; e.g., as in bryophytes, Lycopodium, and most but not all species of ferns. |
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