Redstem ceanothus is primarily dependent on fire for regeneration [1,74,83,86,112]. Without periodic fires, this "obligate pioneer" declines markedly in both vigor and density. It is one of the 1st brushfield shrubs to decline as shade levels increase [61,65,80,86,89]. Redstem ceanothus remains vigorous when burned at 10- to 15-year intervals [65,72]. This shrub may be best adapted to summer wildfires that provide heat scarification followed by cold, moist stratification over winter [63].
Redstem ceanothus exhibits numerous specialized adaptations to fire. Seed banking is particularly important [54,63,77]. Seeds are heat-resistant and germinate in large numbers only after severe fires create favorable growing conditions. Mineral soil provides an excellent seedbed for initial development and growth [77]. Stickney [100,102,103] identified redstem ceanothus as characteristic example of residual colonizer species that rely on fire for improving the seedbed and heat activation of ground-stored seed. He noted that if temperatures generated during burning are insufficient to heat-treat this type of seed, as in the case of fires that burn only the upper portion of duff, seeds will remain dormant [103].
Redstem ceanothus also sprouts from the root crown after aboveground growth is consumed by fire and may regain abundant canopy cover where mature plants were present prior to fire [61,62,68,82,100,109].
FIRE REGIMES:
FIRE REGIMES for plant communities in which redstem ceanothus occurs are summarized below. Find further fire regime information for the plant communities in which this species may occur by entering the species name in the FEIS home page under "Find FIRE REGIMES".
Ceanothus sanguineus is a species of shrub in the family Rhamnaceae known by the common name redstem ceanothus. It is native to western North America from British Columbia to Montana to far northern California; it is also known from Michigan. It grows in temperate coniferous forest habitat in forest openings amidst the conifers. This is an erect shrub approaching 3 meters in maximum height. Its stem is red to purple in color, its woody parts green and hairless when new. The deciduous leaves are alternately arranged and up to about 10 centimeters long. They are thin, light green, oval, and generally edged with glandular teeth. The undersides are sometimes hairy. The inflorescence is a cluster of white flowers up to about 12 centimeters long. The fruit is a three-lobed smooth capsule about 4 millimeters long. This shrub is an important food plant for wild ungulates such as the Rocky Mountain Elk, it is browsed eagerly by many types of livestock, and the seed is consumed by many types of animals.[1]
Their roots have nitrogen fixing nodules.[2]
Ceanothus sanguineus is a species of shrub in the family Rhamnaceae known by the common name redstem ceanothus. It is native to western North America from British Columbia to Montana to far northern California; it is also known from Michigan. It grows in temperate coniferous forest habitat in forest openings amidst the conifers. This is an erect shrub approaching 3 meters in maximum height. Its stem is red to purple in color, its woody parts green and hairless when new. The deciduous leaves are alternately arranged and up to about 10 centimeters long. They are thin, light green, oval, and generally edged with glandular teeth. The undersides are sometimes hairy. The inflorescence is a cluster of white flowers up to about 12 centimeters long. The fruit is a three-lobed smooth capsule about 4 millimeters long. This shrub is an important food plant for wild ungulates such as the Rocky Mountain Elk, it is browsed eagerly by many types of livestock, and the seed is consumed by many types of animals.
Their roots have nitrogen fixing nodules.