Plants and Animals
Isoetes engelmannii Engelmann's quilwort
Aquatic emergent quillwort (60 cm) of shallow acidic lakes; plants tufted and grasslike with onion-like leaves, swollen at base; sporangia borne in basal cavity of leaf.
Status and Rank
US Status: No Status/Not Listed
State Status: E - Endangered (legally protected)
Global Rank: G4 - Apparently secure
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.
This species is found in Intermittent wetlands and soft water lakes in lakeplain landscapes.
Natural Community Types
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.
Robbins spikerush, yellow pond-lily, waterthread pondweed, strict sedge, water smartweed, bluejoint grass, rush, grass-leaved arrowhead,and bulrush.
Quillworts require conservation and protection of hydrology of intermittent wetlands. They are especially vulnerable to ORVs which have caused damage within Michigan's sole site for this species.
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.
Survey Period: From first week of August to fourth week of October
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