CPC Plant Profile: Southern Island Mallow
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Plant Profile

Southern Island Mallow (Lavatera assurgentiflora ssp. glabra)

Photo Credit: Dean Wm Taylor
Description
  • Global Rank: T1 - Critically Imperiled
  • Legal Status: N/A
  • Family: Malvaceae
  • State: CA
  • Nature Serve ID: 154501
  • Date Inducted in National Collection: 09/01/2001

Lavatera assurgentiflora ssp. glabra is a species of flowering plant in the mallow family. It is a sprawling perennial herb or bushy shrub ranging from one to four meters in height. The leaves are up to 15 centimeters long and wide and are divided into 5 to 7 toothed lobes. The showy flowers have five dark-veined deep pink petals which are somewhat rectangular in shape and 2.5 to 4.5 centimeters long. The disc-shaped fruit is divided into 6 or 8 segments each containing a seed. L. assurgentiflora ssp. glabra blooms from February through July. [Jepson]

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 1 accessions of Lavatera assurgentiflora subsp. glabra in orthodox seed collection. There are as many as 190 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, Santa Barbara Botanic Garden holds 2 accessions of Lavatera assurgentiflora subsp. glabra in orthodox seed collection. There are as many as 40 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, Santa Barbara Botanic Garden has collected 2 seed accessions of Lavatera assurgentiflora subsp. glabra from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 12 maternal plants

  • 08/05/2020
  • Seed Collection

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 1 seed accessions of Lavatera assurgentiflora subsp. glabra from 1 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

Endemic to San Clemente and Santa Catalina islands of the southern Channel Islands, California. Believed to have been far more common in its native range prior to the introduction of non-native herbivores. Now reduced to about 10 populations in total. Non-native, feral herbivores have been removed from San Clemente Island, but they probably continue to threaten populations on Santa Catalina. Subspecies distinctiveness is questioned.

  • 01/01/2010

Unexplainable decline in known populations.

  • 01/01/2010

Wilken reports 7 populations in 2001 proposal.

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Photos
Nomenclature
Taxon Lavatera assurgentiflora ssp. glabra
Authority R. Philbrick
Family Malvaceae
CPC Number 9615
ITIS 524214
USDA
Common Names Southern Island Lavatera | Southern Island Mallow
Associated Scientific Names Lavatera assurgentiflora ssp. glabra
Distribution There are 12 known occurrences of  on Santa Catalina and San Clemente Islands of the Channel Islands group in California. [CNPS]
State Rank
State State Rank
California S1
Habitat

Lavatera assurgentiflora ssp. glabra grown in coastal sage scrub habitat. [Jepson]

Ecological Relationships

Pollinators
Common Name Name in Text Association Type Source InteractionID
Butterflies & Moths
Brush-footed butterflies West Coast Lady Butterfly Not Specified Link
Brush-footed butterflies West Coast Lady Butterfly Not Specified Link
Skippers Common Checkered Skipper Not Specified Link
Brush-footed butterflies Painted Lady Butterfly Link
Butterflies Confirmed Pollinator Link
Birds
Hummingbirds Hummingbirds Confirmed Pollinator Link

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