Plants and Animals

Boechera missouriensis Missouri rock-cress

species photo
Robert W. Freckmann

Key Characteristics

Biennial forb (50 cm) of sandy open woodlands; numerous lanceolate, entire, hairless leaves clasp the stem; basal leaves deeply pinnately lobed; fruit sickle-shaped, spreading.

Status and Rank

US Status:
State Status: SC - Special Concern (rare or uncertain; not legally protected)
Global Rank: G5T3?Q
State Rank: S2 - Imperiled

Occurrences

CountyNumber of OccurrencesYear Last Observed
Allegan32005
Barry11985
Berrien11981
Cass21950
Clinton11890
Ionia11890
Kalamazoo51947
Kent21898
Lake22004
Macomb11914
Monroe21958
Muskegon11950
Oakland21916
St. Joseph31950
Wayne11990

Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Habitat

Occurs in sandy, open woodlands and savannas, occasionally in association with coastal plain marshes, borrow pits in lakeplain prairies, and oak-pine woodlands.

For each species, lists of natural communities were derived from review of the nearly 6,500 element occurrences in the MNFI database, in addition to herbarium label data for some taxa. In most cases, at least one specimen record exists for each listed natural community. For certain taxa, especially poorly collected or extirpated species of prairie and savanna habitats, natural community lists were derived from inferences from collection sites and habitat preferences in immediately adjacent states (particularly Indiana and Illinois). Natural communities are not listed for those species documented only from altered or ruderal habitats in Michigan, especially for taxa that occur in a variety of habitats outside of the state.

Natural communities are not listed in order of frequency of occurrence, but are rather derived from the full set of natural communities, organized by Ecological Group. In many cases, the general habitat descriptions should provide greater clarity and direction to the surveyor. In future versions of the Rare Species Explorer, we hope to incorporate natural community fidelity ranks for each taxon.

Associated Plants

Sassafras, sumac, white oak, white pine, rockrose, little bluestem, big bluestem, sedge (Carex muhlenbergii), poverty grass, June grass, and pinweed.

Management Recommendations

Requires maintenance of hydrology and natural disturbance processes. It may also require prescribed fire to maintain openings and colonization areas.

Survey Methods

Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgment of the investigator.

  • Meander search

    • Survey Period: From first week of May to fourth week of July

      Survey Method Comment:
      Both flowers and fruit needed

References

Survey References

  • Elzinga, C.L., D.W. Salzer, and J.W. Willoughby. 1998. Measuring and Monitoring Plant Populations. The Nature Conservancy and Bureau of Land Management, Denver. BLM Technical Reference 1730-1. 477pp.
  • Goff, G.F., G.A. Dawson, and J.J. Rochow. 1982. Site examination for Threatened and Endangered plant species. Environmental Management 6(4): 307-316
  • Nelson, J.R. 1984. Rare Plant Field Survey Guidelines. In: J.P. Smith and R. York. Inventory of rare and endangered vascular plants of California. 3rd Ed. California Native Plant Society, Berkeley. 174pp.
  • Nelson, J.R. 1986. Rare Plant Surveys: Techniques For Impact Assessment. Natural Areas Journal 5(3):18-30.
  • Nelson, J.R. 1987. Rare Plant Surveys: Techniques for Impact Assessment. In: Conservation and management of rare and endangered plants. Ed. T.S. Elias. California Native Plant Society, Sacramento. 8pp.

Technical References

  • Flora of North America Editorial Committee. 2010. Flora of North America, North of Mexico. Volume 7: Magnoliophyta: Salicaceae to Brassicaceae. Oxford Univ. Press. New York, NY. 797 pp.
  • Gleason, H. A., and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second edition. The New York Botanical Garden, Bronx. 910pp.
  • Gray, A. 1950. Gray's Manual of Botany; eighth ed. Van Nostrand Reinghold, New York. 1632pp.
  • Holmgren, N.H. 1998. Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the vascular plants of Northeastern United States and adjacent Canada. New York Botanical Garden, Bronx. 937pp.
  • Voss, E. G. 1985. Michigan Flora. Part II. Dicots (Saururaceae-Cornaceae). Bulletin of the Cranbrook Institute of Science and University of Michigan Herbarium. 724pp.