CPC Plant Profile: Pedate Checker-mallow
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Plant Profile

Pedate Checker-mallow (Sidalcea pedata)

Closeup of Sidalcea pedata Photo Credit: Scott Eliason
Description
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: Federally Endangered
  • Family: Malvaceae
  • State: CA
  • Nature Serve ID: 151180
  • Date Inducted in National Collection: 09/22/2021

The Pedate or Bird-footed checkerbloom (Sidalcea pedata) is a perennial herb with a fleshy tap-root. Stems are few, hairy (slightly to bristly), frequently reddish, and can reach 25 [40] cm. The majority of the leaves are basal, but cauline leaves are also present. Leaves are linear to elliptical and 3[5]-parted. Flowers are deep rose-pink with darker veins and are produced from May to August. Fruits mature between June and August, breaking into 5-6 smooth, slightly beaked parts. Two classes of specimens have been identified, those from the North Baldwin Lake area, and all other populations. The North Baldwin Lake plants have fewer (1-3) flowering stems per plant (versus 10-12) and an earlier flowering time (May-June versus June-August) (Krantz 1979, 1985).

Participating Institutions
Updates
  • 09/29/2020
  • Reproductive Research

Most recent research activities have focused on life history and reproductive biology of the bird-footed checkermallow. Dr. J.M. Leong and her students have examined pollination biology and pollinator preference (Leong and Jones 2006, Jones et al. 2007). Their studies show a marked preference (=higher visitation by potential pollinators) for hermaphroditic flowers (over female flowers). This preference may be due to higher sugar content of the nectar content in the hermaphroditic flowers.

  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 6 accessions of Sidalcea pedata in orthodox seed collection. There are as many as 2621 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

Nature Serve Biotics
  • 05/02/2017

Endemic to California, Sidalcea pedata is known from approximately ten extant occurrences in the Big Bear Basin in San Bernardino County. Its habitat of wet meadows has been reduced by 85% over the last hundred years. Development remains a serious threat to this taxon, in addition to grazing, vehicle activity, and other threats. It is protected in part at Baldwin Lake Ecological Reserve and at Eagle Point.

Linda Prince
  • 01/01/2010

Approximately 80% of the remaining habitat is privately owned and open for future development. Major threats include: Development Grazing Trampling Off-road vehicles Competition from non-native species These factors have secondary impacts due

Linda Prince
  • 01/01/2010

Seventeen populations remain. Last surveys (1988-1992) found approximately 10,000 plants. Several locations have never been accurately surveyed.

Linda Prince
  • 01/01/2010

Most recent research activities have focused on life history and reproductive biology of the bird-footed checkermallow. Dr. J.M. Leong and her students have examined pollination biology and pollinator preference (Leong and Jones 2006, Jones et al. 2007). Their studies show a marked preference (=higher visitation by potential pollinators) for hermaphroditic flowers (over female flowers). This preference may be due to higher sugar content of the nectar content in the hermaphroditic flowers.

Linda Prince
  • 01/01/2010

Fencing to minimize trampling (Ski Beach, Baldwin Lake Ecological Reserve, Belview Meadow) Interpretive signage (Belview Meadow) Removal of non-native herbivores (YMCA: Bluff Lake)

Linda Prince
  • 01/01/2010

Ecological studies to determine soil and hydrologic parameters for transplantation success. Transplanting wild individuals has been done in the past [but was] somewhat unsuccessfully (http://fwie.fw.vt.edu/WWW/esis/lists/e701011.htm) Determine seed germination requirements.

Linda Prince
  • 01/01/2010

Supplement and maintain the seed bank of 4 populations currently housed at RSABG.

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Photos
Nomenclature
Taxon Sidalcea pedata
Authority Gray
Family Malvaceae
CPC Number 3984
ITIS 21901
USDA SIPE4
Common Names Pedate Checker-mallow | birdfoot checkerbloom
Associated Scientific Names Sidalcea pedata
Distribution Bird-footed checkerbloom was first collected over 200 years ago by noted naturalist Samuel Parish and was considered locally abundant at the time. Historically, the checkerbloom could be found over m
State Rank
State State Rank
California S1
Habitat

Bird-footed checkerbloom is restricted to high elevation (18502350 m) seasonally moist alkaline meadows of the Big Bear Basin in San Bernardino County, California (Federal Register 148). These wet meadows are located within the Yellow Pine Forests (Pinus jeffreyi, Pinus monophylla, or P. contorta var. murrayana) of the Transverse Ranges. Most populations are associated with clay soils that become saline upon drying (Krantz 1979, 1985).

Ecological Relationships

Associated species include salt tolerant plants such as Distichlis spicata and Atriplex species. Other non salt-tolerant associates include native perennial grasses (Poa atropurpurea, P. fendleriana, and P. pratensis) and sedges (Carex and Juncus species), and a suite of endemic taxa (Castilleja cinera, Taraxacum californicum, Thelypodium stenopetalum, etc.).

Pollinators
Common Name Name in Text Association Type Source InteractionID

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