Davey Tree Flipbooks

83 RIBBED STEM: Raised edges running the vertical length of the stem ROSETTE: A dense cluster of leaves that grow low to the ground radially arranged from a common central point Rosettes store energy in preparation for stem production when the plant changes form, usually bolting and producing stems, flowers, and seeds. SEEDLING: A young plant that has developed after the seed germinates Once the seedling is established it will convert to the active growth stage in its life cycle SELECTIVE HERBICIDE: An herbicide that is designed to disrupt the health of only a certain group of plants, such as broadleaf or grass SPIKE (FLOWER HEAD): A flower head where many flowers are directly attached to a single tall-growing stalk SPINE: A sharp growth that extends from inside a plant surface Mostly found on the tip of leaves or leaf margins STALK: The supporting structure of the flower(s). STEM: The main supporting structure of the plant Stems are also the water and nutrient transportation systems between leaves and root systems SUMMER ANNUAL: A life cycle in which seeds germinate in spring completing the life cycle in the fall SUMMER/WINTER ANNUAL: Some plants have the ability to complete two life cycles in one season Wild mustard, for example, can germinate in early spring, flower, and seed by early summer. That seed can germinate and complete a second life cycle producing seed again by fall This only happens in years with favorable conditions such as a warm fall and lack of frost events SURFACTANT: A type of adjuvant or additive that will increase the surface area of an herbicide droplet in contact with leaf surfaces TENDRIL: A flexible branch-like structure that a plant uses to attach and pull itself on other plants or objects TERMINAL: The top of a plant or end of a branch TILLERING: Plant shoots that emanate from the root or bottom of the original stalk TRAILING VINES: A vine that grows across the ground and puts down roots at nodes in the stem VEGETATIVE REPRODUCTION: A type of plant reproduction where an existing plant will develop cloned plants from the parent plant's living parts Different types of vegetative reproduction include stump sprouts, root shoots, cut stem regeneration, etc VEGETATIVE GROWTH: A phase in a plant's life cycle where it is growing in length or height, developing new leaves and shoots, and converting energy into plant development This stage is shortly after the seedling develops or in the spring after dormancy WHORLED: A leaf arrangement where three or more leaves grow around the stem at a single node WING: a thin, leaf-like outgrowth that can be found growing along a stem, fruit, or flower. WINTER ANNUAL: A life cycle in which seeds germinate in fall and overwinter as a seedling before the life cycle is completed in the following spring

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