Shrubby reed-mustard (Schoenocrambe suffrutescens)
Where Listed: WHEREVER FOUND
The shrubby reed-mustard (Glaucocarpum suffrutescens) is a perennial herb in the mustard family (Brassicaceae). The clumped stems are 10 to 25 cm (4 to 12 inches) tall arising from a branching woody root crown. The leaves are entire with a smooth margin, 1.0 to 2.5 cm (0.4 to 1 inch) long and 0.3 to 1.0 cm (0.12 to 0.4 inch) wide. The leaf blades are alternately arranged on the stem and are attached to the stem by a short petiole. The shrubby reed-mustard flowers have petals that are light yellow or greenish yellow and spatulately shaped measuring about 10 mm (0.4 inch) long and 3 mm (0.12 inch) wide. The entire flowers are displayed in a raceme of, commonly, 5 to 20 flowers at the end of the plantís leafy stems (Rollins 1938; Welsh and Chatterley 1985; Welsh et al. 1987).
- States/US Territories in which the Shrubby reed-mustard is known to or is believed to occur: Utah
- US Counties in which the Shrubby reed-mustard is known to or is believed to occur: View All
|Status||Date Listed||Lead Region||Where Listed|
|10/06/1987||Mountain-Prairie Region (Region 6)|
» Federal Register Documents
|10/06/1987||52 FR 37416 37420||Final Rule to Determine Glaucocarpum suffrutescens (Toad-flax Cress) to be End. Species; 52 FR 37416-37419|
|10/06/2008||73 FR 58261 58262||5-Year Reviews of Three Wildlife Species and Eight Plant Species in the Mountain-Prairie Region|
|07/01/1975||40 FR 27924||Review of Status of Vascular Plants|
|09/05/1985||50 FR 36118 36122||Proposal to Determine Glaucocarpum suffrutescens to be End. Species w/ Crit. Hab.; 50 FR 36118-36122|
|05/27/2016||81 FR 33698 33700||ETWP; Initiation of 5-Year Status Reviews of 21 Species in the Mountain-Prairie Region|
|09/23/1993||58 FR 49522 49523||Availability of a Draft Recovery Plan for Three Utah Reed-Mustards; Clay Reed-Mustard (Schoenocrambe argillacea), Barnaby Reed-Mustard (Schoenocrambe barnebyi), and Shrubby Reed-Mustard (Schoenocrambe suffrutescens) for Review and Comment|
|Date||Title||Plan Action Status||Plan Status|
|09/14/1994||Utah Reed-Mustards (3 spp.)||View Implementation Progress||Final|
|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||
|09/23/1993||58 FR 49522 49523||Availability of a Draft Recovery Plan for Three Utah Reed-Mustards; Clay Reed-Mustard (Schoenocrambe argillacea), Barnaby Reed-Mustard (Schoenocrambe barnebyi), and Shrubby Reed-Mustard (Schoenocrambe suffrutescens) for Review and Comment||
|10/06/2008||73 FR 58261 58262||5-Year Reviews of Three Wildlife Species and Eight Plant Species in the Mountain-Prairie Region||
|11/08/2010||Schoenocrambe suffrutescens (Shrubby Reed-mustard) 5-Year Review|
» Critical Habitat
|Date||Citation Page||Title||Document Type||Status|
|09/05/1985||50 FR 36118 36122||Proposal to Determine Glaucocarpum suffrutescens to be End. Species w/ Crit. Hab.; 50 FR 36118-36122||Proposed Rule||Unknown|
To learn more about critical habitat please see http://ecos.fws.gov/crithab
» Conservation Plans
No conservation plans have been created for Shrubby reed-mustard.
» Life History
Shrubby reed-mustard occurs along semi-barren, white-shale layers of the Evacuation Creek member of the Green River Formation in the Uinta Basin of eastern Utah (52 FR 37416; Franklin 1995). The habitat of this plant is disjunct knolls and benches resembling small extremely dry desert islands surrounded by mixed desert shrub and pinyon-juniper woodland (52 FR 37416; Franklin 1995).
Flowering occurs from April to May and fruiting occurs May to June (Service 1994b). Shrubby reed-mustard plants produce a few (four) to many (over one hundred) inflorescence each year. The five to twenty flowers on each inflorescence open acropetally (Trepedino and Bowlin n.d.; Service 1994b). Flowers are fragrant in the mornings, but the fragrance declines throughout the day, and over the bloom time of each flower (3-5 days) (Trepedino and Bowlin n.d.; Service 1994b). Reproduction is sexual (Service 1994b; Tepedino 2000). Pollinator exclusion experiments demonstrated that the shrubby reed-mustard is capable of automatic self-pollination (autogamy), but that significantly fewer seeds are set than when open pollination (assumed to be primarily cross-pollination) occurs (Tepedino and Bowlin n.d.; Service 1994b; Tepedino 2000). The following prospective pollinators, all native bee species, were captured while foraging on the flowers: Dialictus perdifficilis, D. sedi, Evylaeus pulveris (all Halictidae), and Andrena walleyi (Andrenidae) (Tepedino and Bowlin n.d.; Service 1994b; Tepedino 2000). These species are small to medium sized solitary bees (Bartlett et al. 2008; DiTerlizzi et al. 2008).
» 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.
ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.