Biology:Salix petrophila

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Short description: Species of shrub

Salix petrophila
Salix petrophila - Flickr - aspidoscelis (2).jpg
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Salicaceae
Genus: Salix
Species:
S. petrophila
Binomial name
Salix petrophila
Rydb.

Salix petrophila, commonly known as alpine willow[1] and Rocky Mountain willow, is a Northwest American mountain shrub in the willow family (Salicaceae).[2]

Habitat and range

It can be found in the subalpine zone and alpine zone of the Sierra Nevada range in wetlands such as moist banks and wet meadows, up to 9,900 to 13,000 feet (3,000 to 4,000 m).[2]

Growth pattern

It is often overlooked because although sprawling and mat-forming, it is very small for a shrub, growing to only 4 inches (0.10 m) tall.[2]

Leaves and stems

Leaves are 34 to 1 34 inches (0.019 to 0.044 m) long, elliptic, with soft hairs on the surface when young.[2] The other mat forming Sierra Nevada alpine willow, Salix nivalis, has smaller leaves (14 to 78 inch (0.0064 to 0.0222 m) that are hairless when young.[2]

Inflorescence and fruit

Each plant has either all male or all female flowers, with an inflorescence that is a dense, upright catkin, growing to 2 inches (0.051 m).[2]

Ecological interactions

It is pollinated by ants, as are some other willows.[2]

References

Wikidata ☰ Q17525974 entry