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You are here >1Up Info > Wildlife, Animals, and Plants > Plant Species > Shrub > Species: Holodiscus dumosus | Bush Oceanspray
 

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BOTANICAL AND ECOLOGICAL CHARACTERISTICS

SPECIES: Holodiscus dumosus | Bush Oceanspray
GENERAL BOTANICAL CHARACTERISTICS : Bush oceanspray is a moderately long-lived, native, deciduous, drought-tolerant shrub that typically ranges from 20 to 60 inches (25-150 cm) in height [14,25,28,36]. Plants are densely to intricately branched from the base. The majority of the foliage originates on spur branches with leaves in fasicles of six or seven [14]. The root system is fibrous and spreading [28]. This species is characteristically found in large clumps [34]. RAUNKIAER LIFE FORM : Phanerophyte REGENERATION PROCESSES : Information on the regenerative processes of bush oceanspray is scant. Plummer [26] reported that this species possessed an above average capacity to spread naturally via wind-dispersed seed on disturbed sites in Utah; however, seedling establishment is rated as only average. Bush oceanspray has a high resistance to disturbance, but modes of vegetative regeneration have not been widely documented or described. For a description of the regeneration processes of a morphologically and ecologically similar ally, see the FEIS write-up for oceanspray (Holodiscus discolor). SITE CHARACTERISTICS : Bush oceanspray is most often associated with dry, rocky habitats [32]. In the Great Basin this shrub is ubiquitous in numerous plant communities from desert valleys to areas well up in the mountains [14]; it is most abundant at elevations between 4,500 and 11,000 feet (1,372 and 3,354 m) [24]. Typical sites include rocky outcrops, slickrock plateau margins, bases of cliffs, talus slopes, and steep, canyon walls [36]. Soils are dry to moderately dry, and well drained; textures range from sand to clay [28]. Plants appear somewhat tolerant of alkaine soils. Elevational ranges vary as follows [5,16,25]: from 6,800 to 10,000 feet (2,073-3,049 m) in AZ 5,500 to 11,000 feet (1,677-3,354 m) in CA 5,500 to 10,000 feet (1,677-3,049 m) in CO 7,200 to 8,500 feet (2,195-2,591 m) in NM 2,500 to 3,000 feet (726-915 m) in OR 4,198 to 12,000 feet (1,280-3,659 m) in UT 6,500 to 8,200 feet (1,982-2,500 m) in WY SUCCESSIONAL STATUS : Self-perpetuating stands of bush oceanspray are indicative of climax conditions on rocky sites in both nonforested and forested communities [4,16]. This species is a pioneer on young lavas in southern Idaho. Plants establish during early seral stages and coexist with later arriving species that are also adapted to such severe site conditions [6]. Bush oceanspray is a component of seral brushfields that develop following fire on white fir/Rocky Mountain maple/bush oceanspray sites in New Mexico [1,13]. However, it is unclear whether postburn coverages are derived via residual plant survival or from seedling establishment. SEASONAL DEVELOPMENT : Bush oceanspray generally begins blooming in June at lower elevations in the Great Basin, but on sites at the upper limits of its elevational range, plants may not flower until August [24]. Anthesis data for several western states are as follows [5,25,36]: State Earliest flowering Latest Flowering date date ------------------ ---------------- CA June August CO June August UT June August WY July September

Related categories for Species: Holodiscus dumosus | Bush Oceanspray

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Information Courtesy: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Fire Effects Information System

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