Sometimes used to refer to large assemblages of organisms in a particular area or to a group of plants growing together and forming a small unit of natural vegetation. Subordinate layers are indicated by forward slashes (e.g., singleleaf pinyon/true mountain-mahogany/creeping phlox) codominant layers by a hyphen (e.g., bur oak-big bluestem savanna).
Cyme definition plus#
In the vegetation classification hierarchy, the level naming the dominant overstory species plus theĭominant species in subordinate layers (midstory, understory, and/or ground layer). Ī fleshy appendage forming an outer seed covering. Ī small, well-defined area on the surface of a cactus bearing spines or flowers. In mosses and liverworts, the female reproductive organ containing eggs. Seed production without fertilization, in which meiosis and fusion of gametes does not occur In mosses and liverworts, the male reproductive organ containing sperm. ġ) Amount of forage required by an animal unit for one month.Ģ) Tenure of one animal unit for a one-month period. dry matter per day under range conditions. One mature (1,000 lb.) cow or the equivalent based upon average daily forage allowance of 26 lbs. Plant species having male and perfect flowers on the same plant. Plant species having male and perfect flowers on separate plants. Woody plants are usually dwarfed, with trees generally absent or at least forming a discontinuous canopy. The community is generally is dominated by mosses and herbs. Plant community that occurs on shallow, alkaline limestone soils. Offspring that show a marked delay in attainment of independent self-maintenance (also see Ī ranked category in vegetation classification, comprising one or more closely related associations. Ĭhemical inhibition of one organism by another. Group of organisms (e.g., trees or stands of trees) of more or less the same age usually denotes more arbitrary divisions or classes than cohort. Stratification helps after ripening take place.
Compare to hibernation.Ī period in which metabolic changes must occur in some dormant seeds before germination will happen. Ī period of dormancy during the summer that allows animals to avoid excessive heat or drought. Intracellular air spaces or channels in leaf, stem, or root tissue, especially common in aquatic plants. Structures or organs developing in an unusual position, as roots originating on the stem. The top layer of ground, subject to annual thawing and freezing in areas underlain with permafrost. Active crown fire is one of several types of crown fire and is contrasted with passive crown fires which are less vigorous types of crown fire that do not emit continuous, solid flames from the canopy. Flames appear to emanate from the canopy as a whole rather than from individual trees within the canopy. An active crown fire presents a solid wall of flame from the surface through the canopy fuel layers. An active crown fire may also be also called a running crown fire or continuous crown fire. A crown fire in which the entire fuel complex is involved in flame, but the crowning phase remains dependent on heat released from surface fuel for continued spread.
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