Search Field Guide
Advanced Search
Montana Animal Field Guide

Montana Field Guides

Small Camissonia - Camissonia parvula
Other Names:  Oenothera parvula

Google for more images Google for web pages
Species of Concern

Global Rank: G5
State Rank: S1S2
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM: SENSITIVE
MNPS Threat Rank: 3

External Links






State Rank Reason (see State Rank above)
Camissonia parvula is currently known from one extant location in Montana on the southern edge of the Pryor Mountains in Carbon County. Populations are thought to be small, but may vary widely from year to year. As an annual plant, it may tolerate - or even respond positively to - moderate levels of disturbance. Additional population and site data are needed for this species in Montana.
  • Details on Status Ranking and Review
    Small Camissonia (Camissonia parvula) Conservation Status Review
    Review Date =
 
General Description
Small Camissonia is an annual herb with branching stems up to 15 cm high. The strap-shaped leaves are alternate and 1-3 cm long. Foliage is sparsely hairy to glandular. Small flowers are attached to the stem at the base of upper leaves. The four separate, yellow petals are 2-4 mm long, and the four sepals are reflexed. The stigma is ball-shaped. Petals and sepals are attached at the top of the ovary, which matures into a linear capsule, 2-4 cm long, that becomes twisted or coiled at maturity.

Phenology
Flowering and fruiting occur in May

Diagnostic Characteristics
Camissonia andina has white or pink flowers. Camissonia scapoidea has leafy stems and stalked fruits, whereas the fruits of C. parvula lack stalks. Camissonia minor has smaller petals than C. parvula.

General Distribution
Mapped Observations

 


Distribution Comments
WA to MT, south to CA, AZ, UT, CO. Known from Carbon County (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 2
Number of Occurrences: 2

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

Recency

 

(Records associated with a range of dates are excluded from time charts)



Habitat
In Montana, Camassia parvula grows from 5200-5500 feet elevation on the southern edge of the Pryor Mountains. It occupies sandy soil weathered from calcareous sandstone, in ecotonal areas between juniper woodland and sagebrush steppe (Lesica and Achuff 1992). Associates include Juniperus osteosperma, Artemisia arbuscula, A. tridentata, Phacelia ivesiana, Streptanthella longirostris, Stipa comata, Bouteloua gracilis, and Gilia inconspicua.

Ecology
This plant is an annual, and population sizes may vary widely from year to year depending on conditions. Seeds can remain dormant in unfavorable years. The habitat is sparsely vegetated suggesting that the small plants are poor competitors for light, water or nutrients. Camissonia parvula may respond positively to moderate disturbance that reduces competition.

Management
As an annual plant, this species can likely tolerate and may respond positively to moderate levels of disturbance (Lesica and Achuff 1992). Populations are relatively small and localized, with the total occupied habitat in Montana estimated at about 2 acres.

References
  • Additional ReferencesLegend:   View WorldCat Record   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.
    • Lesica, P. and P. F. Stickney. 1994. Noteworthy collections: Montana. Madrono 41:228-231.
    • Lesica, P. and P. L. Achuff. 1992. Distribution of vascular plant species of special concern and limited distribution in the Pryor Mountain desert, Carbon County, Montana. Unpublished report to the Bureau of Land Management. Montana Natural Heritage Program, Helena, MT. 105 pp.
  • Web Search Engines for Articles on "Small Camissonia"
Login Logout
Citation for data on this website:
Small Camissonia — Camissonia parvula.  Montana Field Guide.  Montana Natural Heritage Program.  Retrieved on July 30, 2014, from http://FieldGuide.mt.gov/detail_PDONA03190.aspx
 
There are currently 12 active users in the Montana Field Guide.