CPC Plant Profile: Jones' Cycladenia
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Plant Profile

Jones' Cycladenia (Cycladenia humilis var. jonesii)

This picture shows two plants, closeup, including lovely pink flowers. Photo Credit: ©R. Delmatier
Description
  • Global Rank: T2 - Imperiled
  • Legal Status: Federally Threatened
  • Family: Apocynaceae
  • State: AZ, UT
  • Nature Serve ID: 129973
  • Date Inducted in National Collection: 02/09/1992

This federally threatened species is threatened by off-road vehicle activity, as well as the presence of mining claims and oil and gas leases on or adjacent to known locations of this plant. (State of Utah Natural Resources 2002) Jones' cycladenia is a long-lived perennial herb that grows to only 10-15 cm (4-6 in) tall. Though tiny, it produces beautiful pinkish-rose flowers from mid-April to early June. Leaves are round and somewhat succulent. This species is well adapted to its habitat of mixed desert shrubs by overwintering as belowground rhizomes (roots). (Arizona Ecological Services 2002; State of Utah Natural Resources 2002)

Participating Institutions
Updates
  • 10/17/2020
  • Demographic Research

Genetic and ecological studies to estimate clone size in order to accurately determine overall population size. (Sipes et al. 1997)

  • 10/17/2020
  • Genetic Research

Genetic and ecological studies to estimate clone size in order to accurately determine overall population size. (Sipes et al. 1997)

  • 10/17/2020
  • Propagation Research

.In vitro propagation protocols have been developed at CREW for this species. Cultures can be initiated either from seedling shoots or shoots taken from plants growing in situ. Preliminary studies on seed germination have been conducted, and conditions for normal growth in vitro are being studied. Rooted shoots have been produced in vitro, and research is underway to improve the low survival during acclimatization. A protocol for shoot tip cryopreservation has also been developed, using droplet vitrification (Pence et al., 2017).

  • 10/17/2020
  • Cryo

Tissue culture lines of this species are being maintained and studied at CREW. Shoot tips have been cryopreserved and are being held in long-term storage in liquid nitrogen in CREW's CryoBioBank. In vitro propagation protocols have been developed at CREW for this species. Cultures can be initiated either from seedling shoots or shoots taken from plants growing in situ. Preliminary studies on seed germination have been conducted, and conditions for normal growth in vitro are being studied. Rooted shoots have been produced in vitro, and research is underway to improve the low survival during acclimatization. A protocol for shoot tip cryopreservation has also been developed, using droplet vitrification (Pence et al., 2017).

  • 10/17/2020
  • Tissue Culture

Tissue culture lines of this species are being maintained and studied at CREW. Shoot tips have been cryopreserved and are being held in long-term storage in liquid nitrogen in CREW's CryoBioBank. In vitro propagation protocols have been developed at CREW for this species. Cultures can be initiated either from seedling shoots or shoots taken from plants growing in situ. Preliminary studies on seed germination have been conducted, and conditions for normal growth in vitro are being studied. Rooted shoots have been produced in vitro, and research is underway to improve the low survival during acclimatization. A protocol for shoot tip cryopreservation has also been developed, using droplet vitrification (Pence et al., 2017).

Valerie Pence
  • 01/08/2018

In vitro propagation protocols have been developed  at CREW for this species. Cultures can be initiated either from seedling shoots or shoots taken from plants growing in situ.  Preliminary studies on seed germination have been conducted, and conditions for normal growth in vitro are being studied.  Rooted shoots have been produced in vitro, and research is underway to improve the low survival during acclimatization. A protocol for shoot tip cryopreservation has also been developed, using droplet vitrification (Pence et al., 2017).

Valerie Pence
  • 01/08/2018

Tissue culture lines of this species are being maintained and studied at CREW.  Shoot tips have been cryopreserved and are being held in long-term storage in liquid nitrogen in CREW's CryoBioBank.

Nature Serve Biotics
  • 05/02/2017

Known from a few areas in and around the Canyonlands region of southeastern Utah and in northern Arizona. Some sites are separated by over 160 km; most are threatened by impacts from mineral and oil and gas exploration, and/or habitat damage from off-road vehicles. This species has very exacting soil requirements, and also has low fruit set.

Sylvia Torti
  • 01/01/2010

Oil and mineral exploration Mining and tar sands development Global warming Mountain bike and off-road vehicle use One population threatened by natural erosion

Sylvia Torti
  • 01/01/2010

There are four known locations in Utah (Grand, Emery, Kane and Garfield Counties) and one population in Coconino County, Arizona. (Arizona Ecological Services 2002).

Sylvia Torti
  • 01/01/2010

Genetic and ecological studies to estimate clone size in order to accurately determine overall population size. (Sipes et al. 1997)

Sylvia Torti
  • 01/01/2010

In Utah, this species occurs on Bureau of Land Management land.

Sylvia Torti
  • 01/01/2010

Developing reliable ways to estimate population size and examine the degree of inbreeding the possible reasons as to the low success of sexual reproduction. Determine if the variety jonesii should be categorized as a separate species. ORV use and other threats must be monitored.

Sylvia Torti
  • 01/01/2010

The seeds of this species are difficult to germinate. Plants have extremely low seed viability. Ex situ work should focus on vegetative propagation.

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Photos
Nomenclature
Taxon Cycladenia humilis var. jonesii
Authority (Eastw.) Welsh & Atwood
Family Apocynaceae
CPC Number 1204
ITIS 527611
USDA CYHUJ
Common Names Jones cycladenia | Jones' cycladenia | Jones' waxy dogbane | Jones' waxydogbane
Associated Scientific Names Cycladenia jonesii | Cycladenia humilis var. jonesii
Distribution Found in the Canyonlands region of Utah in four counties, as well as in adjacent Coconino county, Arizona. (Arizona Ecological Services 2002)
State Rank
State State Rank
Arizona S1
Utah S2
Habitat

This species exists on salt clay and gypsum soils derived from the Chinle, Cutler and Summerville formations at elevations between 4,400 and 6,000 feet elevation.Communities where this species is found include mixed desert scrub, juniper, or wild buckwheat-Mormon tea. (Arizona Ecological Services 2002)

Ecological Relationships

This is a rhizomatous perennial, which means that individuals reproduce by sending up new individuals from their roots. Sexual reproduction does not seem to be an important reproduction strategy, and pollinators are rarely seen to visit this species.

Pollinators
Common Name Name in Text Association Type Source InteractionID

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