Pacific waterleaf, Hydrophyllum tenuipes Heller
Tender leaved, fibrous rooted rhizomatous perennial herb to 80 cm tall. Leaves to 25 cm long by 15 cm wide, alternate, 5-9 pinnapalmately lobed with toothed margins. Flowers greenish-white to purple to blue, 5-7 mm long, bell shaped with conspicuous strongly exerted stamens in branched cymes. (1,3)
middle to low elevation forests of
Moist maritime climate in low to middle elevation forests (1, 3)
to mid elevation
Moist, shady open conifer and hardwood forests (1, 3)
Plant strategy type/successional stage
found in the literature. Seems to found in fairly mature lowland mixed
conifer/hardwood forests indicating it
is probably a mid to late successional species. Locally in
May be collected as:
Not found in literature. Being a strongly rhizomatous species it can be assumed rhizomes pieces collected in fall would probably be successfully propagated. Seeds probably can also be collected in late summer.
Collection restrictions or guidelines
Typical conservative collection methods for genetic integrity and minimal ecosystem impact probably apply. Foliage is tender so fall/winter collection probably best.
found in literature. May need some period of cold stratification typical of
Not found in literature
Recommended seed storage conditions
Not found in literature. Probably typical low temperature, low humidity conditions
its rhizomatous, mat forming habit propagation using rhizome pieces that
includes roots as well as shoot buds would probably be successful. Has been
Soil or medium requirements
Not found in literature. Given its preference for shady, moist understories a standard high organic content potting soil would probably be best.
Not found in literature. Second year pot ups would probably be mature enough to install in field. Rhizome transplants directly from donor to restoration site might also be successful.
Recommended planting density
Not found in literature. Where English ivy invasions are a concern close (25cm or less) spacing might be best.
Care requirements after installed
Pacific waterleaf’s preference for moist understories would seem to indicate careful weekly watering during the first season would be vital if the installation site’s soils were not naturally moist enough.
Normal rate of growth or spread; lifespan
Not found in literature. Seems to be a vigorous moderate to quick spreader. Lifespan unknown but like most perennial clonal species Pacific waterleaf once established probably persists for a long time.
(1) Hitchcock, C. Leo and Cronquist, Arthur. Flora of the
(2) Kozloff, Eugene. Plants and Animals of the
(3) Pojar, Jim and McKinnon, Andy, eds. Plants of the
(4) USDA PLANTS National Database. http://plants.usda.gov/
Data compiled by
Rodney Pond 04.13.03