Vegetative spread and regeneration are important to the persistence of redosier dogwood. Redosier dogwood spreads and regenerates vegetatively by stolons, layering, and root crown sprouts (review by ). Shrub size commonly increases through the rooting of prostrate stems and lower branches [103,107,312]. Several authors indicate that vegetative spread and regeneration in redosier dogwood is from stolons ([64,79,230,318,327], Geisler 1985 personal communication cited in ). However, the prostrate rooting stems and lower branches important for vegetative spread of redosier dogwood may not be true "differentiated stolons" . Two authors suggest that redosier dogwood spreads and propagates by rapidly growing rhizomes [64,157], but most of the available literature makes no reference to rhizomes in redosier dogwood.
Increases in redosier dogwood shrub size and area occupied are commonly facilitated by stolon growth. Stolons can extend as far as 10 feet (3 m) from the parent plant (Geisler 1985 personal communication cited in ). Stoloniferous growth is common in sand dune habitats . In central Alberta, redosier dogwood survives burial from advancing sand dunes on the northeast coast of Brule Lake through rapidly growing stolons . In shrub carr vegetation in southeastern Wisconsin, stolons may be important in the development of large-sized shrubs but not necessarily large stands. Individual redosier dogwood shrubs occurred as easily distinguishable, multi-stemmed clumps. Stems within a shrub clump were connected by stolons, but shrubs were not connected to one another by stolons. Of 186 redosier dogwood shrubs in 9 stands, the average number of stems/shrub was 18.3, and the canopy diameter of shrubs averaged 4.1 feet (1.3 m) .
Sprouting: Redosier dogwood can regenerate by sprouting from buried stem pieces and from the root crown of top-killed shrubs. Redosier dogwood stem pieces collected from a mid-seral, boreal mixedwood forest near Lac La Biche, Alberta, sprouted only when planted in September. Only stem pieces 6 inches (15 cm) and 12 inches (30 cm) long sprouted; 4-inch (10 cm) stem pieces failed to sprout. Stem pieces planted in the forest understory in June, July, and August failed to sprout, regardless of their size .
Redosier dogwood sprouts from the root crow following top-kill or damage from fire or cutting. For more information on postfire sprouting, see Plant response to fire. In quaking aspen-mixed hardwood stands in the Chippewa National Forest in Minnesota, redosier dogwood shrubs survived 6 consecutive years of cutting . At Utah State University's Farmington Research Farm, 4-year-old redosier dogwood shrubs were compared with and without cutting treatments, which involved removal of all stems to within 0.5 foot (0.15 m) of the root crown. Stems were cut prior to or at the time of bud break. New shoots sprouted from the root crown of all cut shrubs. Cut shrubs regrew to the height of uncut shrubs in each of 2 consecutive years of cutting; however, the total crown area of cut redosier dogwood shrubs was significantly less than that of uncut shrubs .
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