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You are here >1Up Info > Wildlife, Animals, and Plants > Plant Species > Shrub > Species: Arctostaphylos nevadensis | Pinemat Manzanita
 

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BOTANICAL AND ECOLOGICAL CHARACTERISTICS

SPECIES: Arctostaphylos nevadensis | Pinemat Manzanita
GENERAL BOTANICAL CHARACTERISTICS : Pinemat manzanita is a native, spreading to prostrate, evergreen sclerophyllous shrub from 1 to 2 feet (0.3-0.6 m) in height. It is much-branched, with branchlets becoming viscid with age. It typically lacks a lignotuber (see Taxonomy). The bark is thin and freely exfoliating. A description of its root system was not found in the literature. The fruit is a berrylike drupe containing several nutlets [6,17,21,25]. RAUNKIAER LIFE FORM : Phanerophyte REGENERATION PROCESSES : Vegetative: Pinemat manzanita roots adventitiously where stems contact soil [3]. Plants buried under tephra following the 1980 eruption of Mount St. Helens produced 5 to 10 adventitious roots per centimeter of stem during the next growing season [1]. Manzanita species such as pinemat manzanita that lack a lignotuber generally do not sprout after aboveground portions of the plant are damaged [3,25]. Sexual: Little is known about pinemat manzanita sexual regeneration except that it establishes from soil-stored seed in large numbers following fire [27]. Seedling recruitment at other times is not documented in the literature. Manzanita species seeds are disseminated by frugivorous birds and mammals [31]. SITE CHARACTERISTICS : Pinemat manzanita is an indicator of cold, dry sites [23]. It occurs in a modified maritime climate: winters are wet, but high pressure systems in summer result in clear, dry weather [24]. Precipitation may be rain or snow, depending upon elevation. Pinemat manzanita occurs from 2,000 to 10,000 feet (610-3,049 m) in elevation, and is most common above 5,000 feet (1,524 m) [25]. The typical growing season is therefore short; snowpack often does not melt until July [2,24]. Soils supporting pinemat manzanita are typically shallow, infertile, and poorly developed [2]. Textures vary from sand to loam and often contain coarse fragments [26,30,37]. Pinemat manzanita tolerates serpentine soils but is not restricted to them [16,39]. SUCCESSIONAL STATUS : Facultative Seral Species Pinemat manzanita colonizes disturbed sites [17]. It grows well in open plant communities where light levels are high, and persists until late seres. It does not tolerate the low light levels of closed canopy forests. McNeil and Zobel [22] reported that pinemat manzanita in the understory of a white fir (Abies concolor) forest of Crater Lake National Park, Oregon, died where the canopy had closed. SEASONAL DEVELOPMENT : Pinemat manzanita phenological development in the Cascade Range of central Oregon is as follows [29]: growth begins: late May flowering: late May to mid-June fruit develops: mid-June to early July fruit sets: mid-July to late September

Related categories for Species: Arctostaphylos nevadensis | Pinemat Manzanita

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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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