Phyllospadix serrulatus

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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Range Description

Phyllospadix serrulatus occurs in the Pacific from the Alaska Peninsula to Oregon, USA.

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International Union for Conservation of Nature and Natural Resources

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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NatureServe

Global Range: Limited to the coasts of Alaska, British Columbia, Washington, and Oregon.

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NatureServe

Herbs; nodes with 2 roots. Leaves: sheath 4--20 cm, margins not overlapping; blade 30--60 cm ´ 1--4 mm, margins serrulate distally, apex obtuse to truncate or rarely slightly notched; veins 5--7. Generative shoot 1--6 cm, nodes 1, without leaves, of 1(--2) spathes. Inflorescences: peduncles 11--40 ´ 1--2 mm; staminate bract 4--5.5 ´ 2--3 mm; pistillate bract 4--8 ´ 1.5--2 mm, base not narrowed, apex obtuse to truncate. Fruits 4--5 ´ 5 mm.

Source:

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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Habitat

Upper tidal to subtidal, attached to rocks or rarely on deep clay substrates; - 6m.

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License:

Rights Holder:

Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Habitat and Ecology

Along the Pacific coast of North America, this species grows in the upper intertidal zone (+1.5 m to mean lower low water) (Green and Short 2003). Phyllospadix spp. grow on rocky substrates in regions with high wave exposure (Hemminga and Duarte 2000).

Systems

Marine

Source:

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International Union for Conservation of Nature and Natural Resources

Comments: Surf-beaten rocky coasts, from +1.5 m to mean low tide level, according to Phillips and Menez, 1988 (B88PHI01AKUS).

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NatureServe

Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 6 - 20

Comments: Seventeen occurrences listed in Phillips, 1979 (A79PHI01AKUS). Additional occurrences are likely to be discovered as botanical inventories along the coast of British Columbia and southern Alaska proceed.

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NatureServe

Cyclicity

Flowering/Fruiting

Flowering and fruiting summer.

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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Conservation Status

IUCN Red List Assessment

Red List Category

Least Concern

Red List Criteria

Version

3.1

Year Assessed

2010

Assessor/s

Carruthers, T.J.B., Short, F.T., Waycott, M., Kendrick, G.A., Fourqurean, J.W., Callabine, A., Kenworthy, W.J. & Dennison, W.C.

Reviewer/s

Livingstone, S., Harwell, H. & Carpenter, K.E.

Contributor/s

Justification

This is a common species within suitable habitat and the population status is thought to be stable. There are no major threats although there are some localized declines due to coastal development and mechanical damage. This species is listed as Least Concern.

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International Union for Conservation of Nature and Natural Resources

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N4 - Apparently Secure

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe

NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

Reasons: Coastal marine monocot of rocky intertidal areas of Alaska, British Columbia, Washington, and Oregon; in British Columbia considered relatively common but of some conservation concern.

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NatureServe

Trends

Population

The population status of this species is thought to be stable.

Population Trend

Stable

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International Union for Conservation of Nature and Natural Resources

Threats

Major Threats

There are no major threats to this species. Localized threats include coastal development and modifications and over-water structures in the form of ferry terminals, commercial docks. Mechanical damage from boats and dredging is also a minor localized threat.

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International Union for Conservation of Nature and Natural Resources

Comments: No known threats.

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NatureServe

Management

Conservation Actions

There are no known species-specific conservation measures for this species. It is not clear if the federal, provincial or state, or local administrative laws and ordinances recognize this species in the Northeast Pacific (Green and Short 2003).

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