Index of Species Information

SPECIES:  Arctostaphylos viscida
Sticky whiteleaf manzanita seedling. Photo by Becky Howard.


SPECIES: Arctostaphylos viscida
AUTHORSHIP AND CITATION : Howard, Janet L. 1992. Arctostaphylos viscida. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: []. Revisions : Photos and Rim Fire information added on 2 June 2015. ABBREVIATION : ARCVIS SYNONYMS : NO-ENTRY SCS PLANT CODE : ARVI4 ARVIM ARVIP ARVIV COMMON NAMES : sticky whiteleaf manzanita TAXONOMY : The currently accepted scientific name of sticky whiteleaf manzanita is Arctostaphylos viscida Parry (Ericaceae) [34,35]. There are three recognized subspecies [14,47]: Arctostaphylos viscida subsp. mariposa (Dudley) Wells Arctostaphylos viscida subsp. pulchella (Howell) Wells Arctostaphylos viscida subsp. viscida Sticky whiteleaf manzanita hybridizes with hoary manzanita (A. canescens) [18] and greenleaf manzanita (A. patula) [2,14]. LIFE FORM : Shrub FEDERAL LEGAL STATUS : No special status OTHER STATUS : NO-ENTRY


SPECIES: Arctostaphylos viscida
GENERAL DISTRIBUTION : Sticky whiteleaf manzanita occurs in California and Oregon.  It is found in the foothills of the Sierra Nevada from Kern County north to Butte County, California, and in the North Coast Ranges, Klamath Ranges, and Siskiyou Mountains from Lake County, California north to Josephine County, Oregon [13,36,37]. ECOSYSTEMS :    FRES20  Douglas-fir    FRES21  Ponderosa pine    FRES27  Redwood    FRES28  Western hardwoods    FRES34  Chaparral - mountain shrub STATES :      CA  OR BLM PHYSIOGRAPHIC REGIONS :    1  Northern Pacific Border    3  Southern Pacific Border    4  Sierra Mountains KUCHLER PLANT ASSOCIATIONS :    KOO5  Mixed Conifer forest    KOO6  Redwood forest    KO10  Ponderosa shrub forest    KO29  California mixed evergreen forest    KO30  California oakwoods    KO33  Chaparral    KO34  Montane chaparral    K037  Mountain-mahogany - oak scrub SAF COVER TYPES :    299  Pacific Douglas-fir    232  Redwood    233  Oregon white oak    234  Douglas-fir - tanoak - Pacific madrone    244  Sierra Nevada mixed conifer    245  Pacific ponderosa pine - Douglas-fir    246  California black oak    249  Canyon live oak    250  Blue oak - Digger pine    255  California coast live oak SRM (RANGELAND) COVER TYPES : NO-ENTRY HABITAT TYPES AND PLANT COMMUNITIES : Sticky whiteleaf manzanita is a dominant or codominant chaparral species. Common codominants include chamise (Adenostoma fasciculatum), Ceanothus spp., hoary manzanita (Arctostaphylos canescens), greenleaf manzanita (A. patula), and Eastwood's manzanita (A. glandulosa) [14,18,23]. Other associated species include birchleaf mountain-mahogany (Cercocarpus montanus var. glaber), toyon (Heteromeles arbutifolia), California rose (Rosa californica), and mountain misery (Chamaebatia foliolosa) [9,28,38]. The following published classification schemes list sticky whiteleaf manzanita as a climax or indicator species: California chaparral [22] Preliminary descriptions of the terrestrial natural communities of   California [23] Forest plants of the Eastern Siskiyous: their environment and vegetational distribution [48]


SPECIES: Arctostaphylos viscida
IMPORTANCE TO LIVESTOCK AND WILDLIFE : Sticky whiteleaf manzanita is useless as livestock browse but is a valuable source of food for wildlife.  Various chaparral animals including black bear, coyote, dusky-footed woodrat, and brush rabbit eat manzanita fruits.  Birds such as Merriam's turkey, dusky grouse, and band-tailed pigeon also consume the fruits [45].  Black-tailed deer sometimes browse older leaves in the winter, but they prefer sprouts or seedlings [5]. PALATABILITY : The palatability of sticky whiteleaf manzanita leaves is rated as poor for goats, sheep, cattle, and black-tailed deer [43]. NUTRITIONAL VALUE : Sticky whiteleaf manzanita provides poor quality browse [43,45].  The protein content of manzanita leaves ranges from 6 percent in December and January, when deer are most likely to consume them, to 8 percent in August and September.  Black-tailed deer need a minimum of 7 percent protein in their diet for normal maintenance [6].  COVER VALUE : Sticky whiteleaf manzanita often forms dense stands that provide good cover and nesting sites for small birds and mammals [44]. VALUE FOR REHABILITATION OF DISTURBED SITES : NO-ENTRY OTHER USES AND VALUES : The fruits of sticky whiteleaf manzanita can be used to make jelly [2].  Native Americans used the fruits to make cider [13]. OTHER MANAGEMENT CONSIDERATIONS : Timber:  Sticky whiteleaf manzanita may allelopathically inhibit growth of conifer seedlings [1,30,34].  Douglas-fir (Pseudotsuga menziesii) production can be increased, however, if planted in cleared sticky whiteleaf manzanita brushfields.  Some of the fungi (Azospirillum spp.) which form ectomycorrhizal associations with sticky whiteleaf manzanita will infect Douglas-fir roots once sticky whiteleaf manzanita hosts are removed. Douglas-fir seedling survival rates have increased by 50 percent when planted in cleared sticky whiteleaf manzanita brushfields, as opposed to other types of chaparral brushfields. [1]. Control:  Sticky whiteleaf manzanita can be controlled by aerial applications of 2,4-D, glyphosate, or picloram in May or June [8,32].  It can also be controlled by prescribed burning (see Fire Management Considerations).


SPECIES: Arctostaphylos viscida
GENERAL BOTANICAL CHARACTERISTICS : Sticky whiteleaf manzanita is an erect, long-lived, native evergreen shrub.  It ranges from 3 to 13 feet (1-4 m) high, with spreading branches covering an average area of 16 square feet (1.5 sq m).  Its bark is continually shed [36].  The leaves, pedicels, and fruits are often glandular-viscid. Its fruit is a drupe containing hardcoated seeds [2,13,35].  The laterally spreading, shallow roots usually penetrate less than 8 inches belowground (20 cm) [10,39]. RAUNKIAER LIFE FORM : Phanerophyte REGENERATION PROCESSES : Sexual:  Sticky whiteleaf manzanita reproduces by seed [13].  Seeds are dispersed by animals and can remain dormant in seed banks for decades [3,22,33].  Seeds require scarification prior to germination.  This may occur by heat, mechanically, or chemically [3,15,26].  Seeds require overwinter stratification after scarification has occurred [26].  Seeds are produced annually, although production slows during drought years [39].  Seedling mortality is low [33]. Vegetative:  All manzanita species can regenerate by layering [2]. SITE CHARACTERISTICS : Sticky whiteleaf manzanita is typically found on dry, sunny slopes [37].  Climate:  Sticky whiteleaf manzanita occurs in a mediterranean climate, with mild, wet winters and hot, dry summers [22,23]. Elevation:  Sticky whiteleaf manzanita occurs at elevations of 500 to 5,000 feet (152-1,524 m) [37]. Soil:  Sticky whiteleaf manzanita grows in shallow, rocky, sandy soil [31]. Some populations have adapted to serpentine soil [33]. SUCCESSIONAL STATUS : Sticky whiteleaf manzanita is shade intolerant [7,11].  It is both a residual colonizer and a survivor in disturbed communities [22,30].  Sticky whiteleaf manzanita communities are sometimes seral to coniferous forest or oak woodland [30].  Manzanita chaparral, however, is considered a temporally and spatially stable community, and is often described as climax or pyric climax [22,23]. SEASONAL DEVELOPMENT : Sticky whiteleaf manzanita flowers from February to April [36].  Fruits appear in early summer and ripen in late summer or early fall.  Seeds are dispersed from late summer until the following spring [2].  Growth begins in February and ceases in June with the onset of summer drought [24].


SPECIES: Arctostaphylos viscida
FIRE ECOLOGY OR ADAPTATIONS : Plant adaptations:  Sticky whiteleaf manzanita establishes after fire by fire-stimulated germination of dormant seeds stored in the soil [13,22,23]. Fire ecology:  Sticky whiteleaf manzanita has various morphological adaptations which encourage fire.  During drought, the plant undergoes branch die-back, which contributes to fuel loading.  Continuous shedding of bark adds additional fuel [36].  The surface-to-volume ratio of leaves and twigs are perfectly shaped for maximum air circulation, resulting in more complete burning of the plant and adding to fire intensity [20]. Additionally, leaves and twigs contain flammable oils and terpenes [40]. Philpot [40] has reported the heat value of sticky whiteleaf manzanita leaves and twigs at 8,942 Btu per pound (4,973 cal/kg). POSTFIRE REGENERATION STRATEGY :    Ground residual colonizer (on-site, initial community)


SPECIES: Arctostaphylos viscida
Intense fire kills sticky whiteleaf manzanita [13].


Fire-activated seeds germinate during the first postfire growing season
[13,22,23].  Seedling success rates are good.  Sticky whiteleaf manzanita
stands are dense by postfire years 3 or 4 [24], and generally remain so.
Nine years following a fire in Yuba County, California, the combined
density of sticky whiteleaf manzanita and its codominant, deerbrush (Ceanothus
integerrimus), was 6,523 plants per acre (16,118/ha) [33].  By postfire
year 10, these dense stands of sticky whiteleaf manzanita have reached sexually
maturity [12].
A patch of sticky whiteleaf manzanita seedlings establishing on 
the Stanislaus National Forest, 15 months after the 2013 Rim 
Fire. Photo by Becky Howard.
The Research Project Summary Plant response to prescribed burning with
varying season, weather, and fuel moisture in mixed-conifer forests of
California provides information on prescribed fire and postfire response
of many plant community species including sticky whiteleaf manzanita. 

Timber and grazing:  Annual prescribed burning can convert sticky whiteleaf
manzanita brushfields to timber or pastureland if the site is otherwise
suitable.  Yearly fires prevent sticky whiteleaf manzanita seedlings from
maturing and gradually reduce the residual seed stock.  Eventually,
sticky whiteleaf manzanita is eradicated from the site [20,26].  Safe
conditions exist for a late winter or early spring burning if each of
these elements is within the following range [19]:

                  Element                       Intensity
                                              low       high

          fuel stick moisture (%)              15         5
          relative humidity (%)                58        26
          wind speed (mi/h)                     0        10
          air temperature (degrees F)          40        84       

Fire suppression:  Fire suppression in sticky whiteleaf manzanita chaparral
results in unnaturally high fuel levels.  This eventually results in
severe wildfires that are extremely difficult to contain.  Prescribed
burning is recommended for reducing fuel loading in sticky whiteleaf manzanita
communities [20].


SPECIES: Arctostaphylos viscida
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