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Montana Field Guide

Montana Field Guides

Tower-mustard - Turritis glabra
Other Names:  Tower Rockcress, Arabis glabra

Non-native Species

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

External Links






 
General Description
Taprooted annual or biennial (monocarpic) with an unbranched caudex. Stems usually unbranched, 40–120 cm. Vestiture of simple or branched hairs on basal leaves and stem base, glabrous above. Basal leaves petiolate, oblong, shallowly dentate, 2–10 cm long. Stem leaves lance-shaped, auriculate, strongly clasping. Inflorescence an unbranched raceme. Flowers white; petals 4–6 mm long. Fruits siliques 5–10 cm × 1–1.5 mm, nearly terete, strictly erect (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range

Non-native
 


Range Comments
Circumboreal; widespread in North America. Apparently native in parts of the U.S. and Canada, but may be introduced in other parts.

Possibly introduced in parts of Canada (Moss, 1994). Native in the U.S. but apparently introduced from southern Alaska-Yukon-District of Mackenzie-British Columbia-Alberta to Saskatchawan, Manitoba, Ontario, Quebec, and perhaps New Brunswick (Scoggan, 1978). Rare in North Carolina and Virginia; possibly introduced there (Weakley, 2000).


Observations in Montana Natural Heritage Program Database
Number of Observations: 161

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Disturbed or sparsely vegetated soil of streambanks, meadows, grasslands, open forest; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Management

References
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Ament, R.J. 1995. Pioneer Plant Communities Five Years After the 1988 Yellowstone Fires. M.Sc. Thesis. Bozeman, MT: Montana State University. 216 p.
    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
    • Saunders, J.K., Jr. 1954. A two-year investigation of the food habits and range use of the Rocky Mountain goat in the Crazy Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 22 p.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
    • Simanonok, M. 2018. Plant-pollinator network assembly after wildfire. Ph.D. Dissertation. Bozeman, MT: Montana State University. 123 p.
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Citation for data on this website:
Tower-mustard — Turritis glabra.  Montana Field Guide.  .  Retrieved on , from