White-stem stickleaf - Mentzelia albicaulis
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
Mentzelia albicaulis occurs in southwest and central Montana. Populations are scattered and occur in more counties than previously known.
- Details on Status Ranking and Review
ScoreU - Unknown
ScoreF - 20,000-200,000 sq km (~8,000-80,000 sq mi)
Area of Occupancy
ScoreE - 26-125 4-km2 grid cells
Number of Populations
ScoreC - 21 - 80
Number of Occurrences or Percent Area with Good Viability / Ecological Integrity
ScoreB - Very few (1-3) occurrences with excellent or good viability or ecological integrity
ScoreC - Moderate. Generalist or community with some key requirements scarce
ScoreU - Unknown
ScoreU - Unknown
ScoreD - Low
CommentNo known threats.
ScoreC - Not intrinsically vulnerable
Plants: Annual. Stems whitish and shining (Hitchcock et al. 1961), 8–30 cm in height, simple (Lesica 2012) or frequently branched from below, smooth below, smooth to rough above (McGregor et al. 1986).
Leaves: Leaves basal and cauline, scaberulous (roughened minutely), possessing ability to attach to clothes and hair (McGregor et al. 1986), 2–8 cm in length (Lesica 2012), 2-12 mm in width (McGregor et al. 1986); basal leaf blades mostly linear, the margins entire to shallowly lobed, tapering to a narrow petiole; cauline leaf blades from nearly entire to laciniate with linear lobes, with short petiole or none (Hitchcock et al. 1961).
Inflorescence: Flowers single to several in an open flat-topped inflorescence, with flowering beginning at the margins and progressing inward (McGregor et al. 1986).
10X(Lesica’s contribution adapted from Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.)
Flowers May – July (McGregor et al. 1986; Hitchcock et al. 1961).
resembles the more common M. dispersa
. M. dispersa
differs by possessing typically unlobed leaves as opposed to nearly entire to shallowly lobed, ovate rather than linear involucral bracts, and smaller papillae on the seed surface, requiring 20X lens to see as opposed to 10X (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
BC to SD south to CA, NM, TX and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Sparsely vegetated, often disturbed and sandy soil of grasslands, steppe, open forest; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Flowers: Flowers yellow with linear bracts, diurnal; sepals 2–3 mm long; petals 5, obovate, 3–5 mm long (Lesica 2012); stamens numerous, shorter than petals (McGregor et al. 1986).
Fruit: Capsule cylindric, 8–20 mm long (Lesica 2012), ca 2 mm in diameter (Hitchcock et al. 1961), opening at the top with a valve (McGregor et al. 1986); seeds angular, in 2 to 3 columns, papillose under 10X (Lesica 2012).(Lesica’s contribution adapted from Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.)
- Literature Cited AboveLegend: View Online Publication
- Great Plains Flora Association (McGregor, R.L., coordinator, and T.M. Barkley, R.E. Brooks, and E.K. Schofield - eds.). 1986. Flora of the Great Plains. Lawrence, KS: Univ. Press Kansas. 1392 pp.
- Hitchcock, C. L., A. Cronquist, M. Ownbey, and J. W. Thompson. 1961. Vascular Plants of the Pacific Northwest, Part 3. Saxifragaceae to Ericaceae. Seattle, WA and London, England: University of Washington. 614 pp.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Britton, N. L. and A. B. Brown. 1913. An Illustrated Flora of the Northern United States, Canada, and the British Possessions. 2nd Edition in 3 Volumes. New York, NY: Charles Scribner's Sons. B13BRI01PAUS.