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Home/Species/ Daubenmire's Dasynotus

Dasynotus daubenmirei

I.M. Johnston

Daubenmire's Dasynotus

G2Imperiled Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
High - mediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.153266
Element CodePDBOR0C010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderLamiales
FamilyBoraginaceae
GenusDasynotus
Concept Reference
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Rank MethodLegacy Rank calculation - Biotics v1
Review Date2020-01-09
Change Date2020-01-09
Edition Date2020-01-09
Edition AuthorsTomaino, A. (2020)
Threat ImpactHigh - medium
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences1 - 20
Rank Reasons
Endemic to the Clearwater Mountains of northern Idaho. The species is known from seven occurrences of which three are historical. Most populations are large. Threats include lack of disturbance, fire suppression, and roadside herbicide spraying.
Range Extent Comments
Known only from Idaho county, Idaho (Hitchcock and Cronquist 2018). Located in the vicinity of Walde Mountain, north of the confluence of the Lochsa and Selway Rivers on the Clearwater National Forest, and north for five miles to Canyon Junction, Idaho.
Occurrences Comments
Seven occurrences, of which three are historical (Northern Idaho Rare Plant Working Group 2016).
Threat Impact Comments
Species responds well to management activities that create openings in the forest, such as timber harvest; some of these activities may be declining (Northern Idaho Rare Plant Working Group 2016). Other threats that may impact this species include fire suppression, roadside herbicide spraying, and climate change (Northern Idaho Rare Plant Working Group 2016). Grazing by sheep and horses could be detrimental according to Crawford (1980).
Ecology & Habitat

Description

Dasynotus is a perennial herbaceous plant with annual shoot reduction to shoot buds on rhizomes. Its oblanceolate cauline leaves are nearly sessile 9-17 cm long by 1.5-3.5 cm wide. Flowers are all white, approximately 5 cm wide and are borne in false racemes. Fruits are 1-4 nutlets per flower, each with a hispid upper surface (Johnson and Crawford 1978).

Diagnostic Characteristics

A large Hackelia-like borage; all leaves on the upper 2/3 of the stem. Flowers few, subsalvarform, 2-2.5 cm across, white. Pedicels deflexed somewhat in Hackelia manner after flowering. In open situations dasynotus forms dense clusters of stems and appears shrub-like by midsummer. On shaded sites stems grow singly in widely spread groups.

Habitat

Openings in mid-elevation mixed-coniferous forest communities. Requires cool, moist conditions in the spring and early summer. Occurs in mid-elevation forest openings, roadsides, and clearcuts (Northern Idaho Rare Plant Working Group 2016).

Ecology

Dasynotus daubenmirei is a shade intolerent species which requires a moist, cool environment especially in the spring and early summer. As a trend, coverage of dasynotus decreases as a stand approaches climax. Using the classification of Steele et al., it occurs on four habitat types, most commonly on Abies grandis/ and Thuja/Asarum caudatum, rarely on Thuja/Clintonia uniflora and Abies lasiocarpa/Calamagrostis canadensis-Ledum glandulosum phase. It is absent from wet sites, ie. near bogs or wet meadows, but is frequent along small seasonal and perennial streams. It is fire tolerant. Its reaction to grazing is not known. Favorable environments for Dasynotus daubenmirei invasion are created during some land management activities thus expanding its populations (Crawford 1980).

Reproduction

Seed production is much greater in open disturbed sites than in forested stands. D. daubenmirei is vigorous in vegetative reproduction.
Terrestrial Habitats
Forest/WoodlandForest - MixedForest Edge
Other Nations (1)
United StatesN2
ProvinceRankNative
IdahoS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureUnknownUnknown—
2.3 - Livestock farming & ranchingUnknownUnknown—
4 - Transportation & service corridorsRestricted (11-30%)Moderate - slight—
4.1 - Roads & railroadsRestricted (11-30%)Moderate - slight—
5 - Biological resource useLarge - restrictedSerious or 31-70% pop. decline—
5.3 - Logging & wood harvestingLarge - restrictedSerious or 31-70% pop. decline—
7 - Natural system modificationsRestricted (11-30%)Moderate - slight—
7.1 - Fire & fire suppressionRestricted (11-30%)Moderate - slight—
11 - Climate change & severe weatherUnknownUnknown—

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (1)
Idaho (1)
AreaForestAcres
North Lochsa SlopeNez Perce-Clearwater National Forest117,662
References (14)
  1. Caicco, S. L. 1989. Field investigations of selected sensitive plant species on the Nez Perce National Forest. 12 pp. plus appendices.
  2. Crawford, R. C. 1980. Ecological investigations and management implications of six northern Idaho endemic plants on the proposed endangered and threatened lists. Unpublished thesis, University of Idaho, Moscow. 200 pp.
  3. Davis, R.J. 1952. Flora of Idaho. Brigham Young Univ. Press, Provo, UT. 836 pp.
  4. Graf, P. E. 1974. Successional stages of red alder in Bonner County, Idaho. Unpublished thesis, University of Idaho, Moscow. 146 pp.
  5. Heidel, B. 1979. Endangered and threatened plants in the Northern Idaho BLM District. Unpublished report. 100 pp.
  6. Hitchcock, C.L., and A. Cronquist. 2018. Flora of the Pacific Northwest: An illustrated manual. Edited by D.E. Giblin, B. S. Legler, P.F. Zika, and R. G. Olmstead. 2nd edition. Univ. Washington Press, Seattle. xiii + 822 pp.
  7. Johnson, F. D., and R. C. Crawford. 1978. Ecology and distribution of six species of sensitive plants of northern Idaho: Clearwater Basin sensitive plants study. 9 pp. plus appendices. Conservation Data Center, Boise, Idaho.
  8. Johnston, I. M. 1948. Studies in the Boraginaceae, XVI. Journal of the Arnold Arboretum 29: 227-241.
  9. Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
  10. Lorain, C. C. 1991b. Action plan for sensitive plant species on the Clearwater National Forest. Unpublished report. 63 pp. plus appendices.
  11. Moseley, R. K. 1988b. Idaho natural areas: Daubenmire's Dasynotus Botanical Area, Clearwater National Forest. Sage Notes: the Idaho Native Plant Society Newsletter 11(1): 4-5.
  12. Northern Idaho Rare Plant Working Group (NIRPWG). 2016. Species accounts and rank calculators.
  13. Packard, P. L. 1978. Status report for <i>Dasynotus daubenmirei</i>. 6 pp.
  14. Steele, B., F. Johnson, and S. Brunsfeld, eds. 1981. Vascular plant species of concern in Idaho. Forest, Wildlife and Range Experiment Station, Moscow, ID. 161 pp.