worksheet comparing five coastal willows - northern Humboldt County
Larry Levine 3-19-03, 822-7190

On CNPS plant walks in the Table Bluff to Trinidad area, we commonly encounter four or more types of willows, distinguishable by field characters. Some of these entities clearly correspond to recognized species, while the remainder seem to belong to a pair of hybridizing species, S. lasiolepis, and S. hookeriana. While we often encounter individuals with the "ideal" characters of one of the two, usually we see mixed characters. S. laevigata may be absent in our coastal region. A comparison of it and S. lucida ssp. lasiandra was provided by John Bair, 826-7794 x14,

related five-stamen types lasiolepis complex (intergrade)
Salix sitchensis

Sitka willow
Salix lucida ssp. lasiandra

shining willow
Salix laevigata

red willow
Salix lasiolepis

arroyo willow
(inland name)
Salix hookeriana

coastal willow
growth form erect erect, tree-like,
near water
bud scale fused fused unfused fused
leaf shape oblanceolate tapered lanceolate long-tapered
lanceo- to oblanceolate broad
leaf underside silky green or glaucous green glaucous
when mature
leaf features
quilted above,
glands at base of blade, on margin, and on stipules glands at base of blade, stipules deciduous
twig red
(not from sun)
red or yellowish stout, hairy,
often glaucous
bark smooth furrowed smooth
catkin long, narrow on leafy stems robust, esp. male
stamens 1 5 2
flower bract yellow, hairy green, sparsely hairy, deciduous black, very hairy
flower timing before leaves after leaves before leaves

Last modified  03/29/03 02:24 EST