CPC Plant Profile: San Clemente Island Bird's-foot-trefoil
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Plant Profile

San Clemente Island Bird's-foot-trefoil (Acmispon argophyllus var. adsurgens)

This shot shows the flowers. Photo Credit: Mark Elvin
Description
  • Global Rank: T2 - Imperiled
  • Legal Status: N/A
  • Family: Fabaceae
  • State: CA
  • Nature Serve ID: 132250
  • Date Inducted in National Collection: 06/01/2017

Lotus argophyllus var. adsurgens, a shrubby perennial with silvery leaves and yellow-orange flowers, is endemic to San Clemente Island, part of the Channel Islands, California. The Island's recent history of intense grazing has eliminated much of the natural vegetation. Currently, Lotus argophyllus var. adsurgens is known from three sites on the island that support less than 100 individuals (USFWS 1996) and is listed as state endangered (CDFG 2002).

Participating Institutions
Updates
  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 7 accessions of Acmispon argophyllus var. adsurgens in orthodox seed collection. There are as many as 8458 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 08/05/2020
  • Seed Collection

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 3 seed accessions of Acmispon argophyllus var. adsurgens from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass an unknown number of maternal plants

Nature Serve Biotics
  • 05/02/2017

CNSP List: 1B; R-E-D Code: 3-3-3; State/Fed. Status: CE/C2.

  • 01/01/2010

The introduction of alien herbivores more than a century ago has had dramatic negative effects on plant community composition on all of the Channel Islands. These effects include the reduction of native plant cover, density and biomass. Intensive herbivor

  • 01/01/2010

Lotus argophyllus var. adsurgens is known from 10 populations at the southern tip of San Clemente Island. (USFWS 1996)

  • 01/01/2010

Liston and colleagues (1990) found a low degree of hybridization between Lotus species on San Clemente Island. Although hybridization was not extensive, it may still pose a long-term threat (Liston et al. 1990).

  • 01/01/2010

Since the U.S. Navy has removed goats, as a part of its Feral Animal Removal Program, the general condition of native species has improved (CDFG 2002).

  • 01/01/2010

Population monitoring and continued habitat restoration as well as understanding reproductive ecology and habitat needs through various life stages will all aid in conservation efforts.

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Photos
Nomenclature
Taxon Acmispon argophyllus var. adsurgens
Authority (Dunkle) Brouillet
Family Fabaceae
CPC Number 2684
ITIS 821003
USDA LOARA5
Common Names San Clemente Island Bird's-foot-trefoil | Santa Cruz Island silverhosackia
Associated Scientific Names Lotus argophyllus var. adsurgens | Acmispon argophyllus var. adsurgens | Lotus argophyllus ssp. adsurgens
Distribution Lotus argophyllus var. adsurgens is endemic to the southern tip of San Clemente Island, part of the Channel Islands, California. (CDFG 2002).
State Rank
State State Rank
California S1
Habitat

This species grows on marine terraces in the cholla phase of maritime desert scrub vegetation (CDFG 2002).

Ecological Relationships

Ecological relationships are unknown.

Pollinators
Common Name Name in Text Association Type Source InteractionID
Bees
Generalist bees Floral Visitor Link
Leaf-cutting bees Megachile rotunda Not Specified Link
Leaf-cutting bees Osmia bruneri Not Specified Link
Leaf-cutting bees Osmia calla Not Specified Link
Leaf-cutting bees Anthidium collectum Not Specified Link
Leaf-cutting bees Osmia exigua Not Specified Link
Leaf-cutting bees Anthidium collectum Not Specified Link
Leaf-cutting bees Osmia exigua Not Specified Link
Leaf-cutting bees Anthidium collectum Not Specified Link
Leaf-cutting bees Osmia gabrielis Not Specified Link
Leaf-cutting bees Anthidium utahanse Not Specified Link
Leaf-cutting bees Osmia juxta Not Specified Link
Anthophorine bees Anthophora urbana Not Specified Link
Leaf-cutting bees Osmia kincaidii Not Specified Link
Leaf-cutting bees Osmia kincaidii Not Specified Link
Leaf-cutting bees Ashmeadiella californica californica Not Specified Link
Leaf-cutting bees Osmia nemoris Not Specified Link
Sweat bees Augochlorella pomoniella Not Specified Link
Leaf-cutting bees Osmia nemoris Not Specified Link
Bumble bees Bombus caliginosus Not Specified Link
Leaf-cutting bees Osmia nigrifrons Not Specified Link
Bumble bees Bombus vosnesenskii Not Specified Link
Leaf-cutting bees Osmia nigrifrons Not Specified Link
Leaf-cutting bees Osmia nigrifrons Not Specified Link
Leaf-cutting bees Osmia nigrifrons Not Specified Link
Leaf-cutting bees Osmia Not Specified Link
Leaf-cutting bees Hoplltis sambuci Not Specified Link
Leaf-cutting bees Megachile gentilis Not Specified Link
Leaf-cutting bees Pegachile parallela facunda Not Specified Link
Leaf-cutting bees Megaghile brevis onubrychia Not Specified Link
Leaf-cutting bees Megaghile brevis onubrychia Not Specified Link
Sweat bees Sphecodes Not Specified Link
Long-horned bees Synhalonia actuosa Not Specified Link
Leaf-cutting bees Ashmeadiella timberlakei Not Specified Link
Leaf-cutting bees Anthidium formosum Not Specified Link
Leaf-cutting bees Anthidium mormonum Not Specified Link
Leaf-cutting bees Osmia dolerosa Not Specified Link
Leaf-cutting bees Osmia laeta Not Specified Link
Leaf-cutting bees Osmia malina Not Specified Link
Leaf-cutting bees Osmia nifoata Not Specified Link
Leaf-cutting bees Osmia regulina Not Specified Link
Leaf-cutting bees Osmia sanctae-rosae Not Specified Link
Leaf-cutting bees Osmia visenda Not Specified Link
Mining bees Perdita trisignata Not Specified Link
Butterflies & Moths
Blues Plebejus acmon Not Specified Link
Skippers Polites sabuleti Not Specified Link
Skippers Pyrgus cummunis Not Specified Link
Beetles
Flower beetles Mordella atrata albosuturalis Not Specified Link
Leaf beetles Acanthoscelides fraterculus Not Specified Link
Flower beetles Mordella hubbsi Not Specified Link
Jewel beetles Acmaeodera angelica Not Specified Link
Jewel beetles Acmaeodera feneysi Not Specified Link
Jewel beetles Agrilus sierrae Not Specified Link
Weevils Apion Not Specified Link
Lady beetles Coccinella trifasciata juliana Not Specified Link
Leaf beetles Diachus auratus Not Specified Link
Lady beetles Hippodamia convergens Not Specified Link
Leaf beetles Pachybrachys hybridus Not Specified Link
Leaf beetles Pachybrachys signatifrons Not Specified Link
Checkered beetles Phyllobaenus scaber Not Specified Link
Leaf beetles Saxinis saucia Not Specified Link
Checkered beetles Trichodes ornatus Not Specified Link
Flies
Syrphid flies Paragus Not Specified Link
Other
Omalus granti Not Specified Link
Potter wasps Leptochilus menkei Not Specified Link
Plant bugs Lopidea Not Specified Link
Psenelus Not Specified Link
Potter wasps Stenodynerus blandus Not Specified Link

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