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|Family: Salicaceae||View Description||Dichotomous Key|
|Genus: Salix||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Salix petrophila Rydb.
Habit: Shrub < 0.1 m, trailing, rooting. Stem: twigs yellow-green or -brown, sparsely soft-shaggy-hairy. Leaf: stipules 0 or vestigial; petiole 2--13 mm; young leaves long-soft-hairy; mature blade 19--44 mm, elliptic to obovate, acuminate to rounded (base wedge-shaped), entire, abaxial hairs long-soft-shaggy, wavy, to +- 0. Inflorescence: blooming with leaves, 18--60 mm, on leafy shoots 2--40 mm; flower bract +- tan to dark brown. Staminate Flower: stamens 2; nectaries generally only adaxial. Pistillate Flower: ovary silky, stalk 0.2--0.8 mm, style 0.4--1.6 mm. Chromosomes: 2n=76.
Ecology: Alpine tundra; Elevation: 1670--4000 m. Bioregional Distribution: CaRH (Lassen Peak), c&s SNH; Distribution Outside California: to western Canada, Colorado, New Mexico. Flowering Time: Jul--Aug Note: California, southern Rocky Mountains plants treated as part of Salix arctica Pall. in TJM (1993) treated here as a separate sp., Salix petrophila, elsewhere as Salix arctica subsp. petraea. Plants with narrow, sharp-pointed leaves approach Salix cascadensis Cockerell of Washington and northern, need study.
Synonyms: Salix arctica Pall., misappl.; Salix arctica subsp. petraea (Andersson) Á. Löve, D. Löve, & B.M. Kapoor
eFlora Treatment Author: George W. Argus
Jepson Online Interchange
Previous taxon: Salix orestera
Next taxon: Salix planifolia
Citation for this treatment: George W. Argus 2016. Salix petrophila, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=42690, accessed on April 28, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on April 28, 2016.