Uinta Basin hookless cactus (Sclerocactus wetlandicus)
Where Listed: WHEREVER FOUND
Uinta Basin hookless cactus - Sclerocactus wetlandicus S. wetlandicus is a barrel-shaped cactus that ranges from 4 to 18 centimeters (cm) (1.5 to 7 inches (in.)) tall, with exceptional plants up to 30 cm (12 in.) tall. The stems have typically 12 to 15 ribs that extend from the ground to the tip of the plant. Along the ribs are areoles (small, cushion-like areas) with hooked spines radiating out (Heil and Porter 2004). There are two types of spines, radial and central, defined by the size and position on the plant (74 FR 47112, September 15, 2009). The 6 to 14 radial spines are located around the margin of the areole, extending in a plane parallel to the body of the plant. The radial spines are white or gray to light brown, and are 6 to 20 mm (0.24 to 0.8 in.) long. The one to five central spines (usually three) are 15 to 30 mm (0.5 to 2.0 in.) long, are generally longer than radial spines, and extend from the center of the areole. The central spines include abaxial and lateral forms. Abaxial spines are typically single and are noticeably bent at an angle usually less than 90 degrees. Lateral spines are usually present in pairs on either side of the abaxial spine, but are more or less straight and diverge from the abaxial spine at an acute angle (usually 20 to 50 degrees). The funnel-shaped flowers usually have pink to violet tepals (petal-like flower parts not differentiated into petals and sepals) with yellow stamens (the male reproductive organ of the flower), and are 2 to 5 cm (0.8 to 2 in.) long and 2 to 5 cm (0.8 to 2 in.) in diameter (74 FR 47112, September 15, 2009). The fruit is short, barrel-shaped, reddish or reddish grey when ripe, 7 to 12 mm (0.3 to 0.5 in.) wide, and 9 to 25 mm (0.35 to 1.0 in.) long.
- States/US Territories in which the Uinta Basin hookless cactus is known to or is believed to occur: Utah
- US Counties in which the Uinta Basin hookless cactus is known to or is believed to occur: View All
- USFWS Refuges in which the Uinta Basin hookless cactus is known to occur:
Ouray National Wildlife Refuge
- Additional species information
|Status||Date Listed||Lead Region||Where Listed|
|09/15/2009||Mountain-Prairie Region (Region 6)|
» Federal Register Documents
|Date||Title||Plan Action Status||Plan Status|
|04/14/2010||Sclerocactus wetlandicus (Uinta Basin hookless cactus) Recovery Outline||Recovery efforts in progress, but no implementation information yet to display||Outline|
|Date||Citation Page||Title||Document Type|
|05/27/2016||81 FR 33698 33700||ETWP; Initiation of 5-Year Status Reviews of 21 Species in the Mountain-Prairie Region||
|03/28/2008||Uinta Basin hookless cactus 5-Year Review|
» Critical Habitat
No critical habitat rules have been published for the Uinta Basin hookless cactus.
» Conservation Plans
No conservation plans have been created for Uinta Basin hookless cactus.
» Life History
Sclerocactus wetlandicus is generally found on coarse soils derived from cobble and gravel river and stream terrace deposits, or rocky surfaces on mesa slopes at 1,350 to 1,900 meters (4,400 to 6,200 feet) in elevation (Service 1990; Heil and Porter 1994, 2004).
A broad assemblage of native bees and possibly other insects, including ants and beetles, pollinate Sclerocactus wetlandicus (Service 1990). Under pollination may be a problem for S. wetlandicus, but more studies are needed (Tepedino 2000).
Associated desert shrubland vegetation includes Atriplex confertifolia, Pleuraphis jamesii, Artemisia nova, and Achnatherum hymenoides (Service 1990). Relative size of individual plants within a population covering one habitat type is primarily a function of the age of the plant and only secondarily a function of relative site quality (Service 1990).
» Other Resources
NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
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