Plants and Animals
Rubus acaulis Dwarf raspberry
Small tufted forb of calcareous peatlands in the Upper Peninsula; stems upright and spineless, bearing trifoliate leaves, the terminal one broadly ovate and short-stalked, the lateral ones sessile, often with a small thumb-like lobe on the side; 5- parted flowers are deep pink, borne on long glandless stalks.
Status and Rank
State Status: E - Endangered (legally protected)
Global Rank: G5T5
State Rank: S1 - Critically imperiled
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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.
A boreal species found in open to partially forested poor to rich fens, often on hummocks at the margins of large peatland complexes.
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.
Northern white-cedar, tamarack, black spruce, sphagnum moss, sedges, tufted bulrush, twig-rush, leatherleaf, bog rosemary, round leaved sundew, cotton grass, swamp-laurel, small cranberry, three-leaved false Solomon's seal, Labrador tea, chokeberry, marsh fern, royal fern, dwarf raspberry (R. pubescens), pitcher-plant, and bog birch.
The species primarily requires perpetuation of hydrological regime and protection of habitat. It is likely vulnerable to logging activities that impact peatlands.
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgment of the investigator.
Survey Period: From third week of May to second week of September
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- 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.
- 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.
- Scoggan, H.J. 1978. The Flora of Canada. National Museum of Natural Science Publications Botany 4: 1711pp.
- Voss, E. G. 1985. Michigan Flora. Part II. Dicots (Saururaceae-Cornaceae). Bulletin of the Cranbrook Institute of Science and University of Michigan Herbarium. 724pp.