Linum sulcatum
Furrowed flax
Image of Linum sulcatum

Photo by Merel Black 

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Key Characteristics

Small slender forb of dry prairies and barrens; leaves narrow and scattered along the stem, with a pair of dark stipular glands at the leaf base; flowers yellow, the tiny outer sepals (4 mm) with minute glandular teeth on the margin.

Status and Rank

  • State Status: SC
  • State Rank: S2S3
  • Global Rank: G5


County NameNumber of OccurrencesYear Last Observed
Distribution map for Linum sulcatum

Updated 5/15/2018. 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 disturbed pockets with exposed mineral soil within oak barrens and dry prairie remnants.

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.

Associated Plants

Andropogon gerardii (big bluestem), Artemisia campestris (wild wormwood), Asclepias tuberosa (butterfly-weed), Carex pensylvanica (Pennsylvania sedge), Coreopsis lanceolata (sand coreopsis), Cyperus lupulinus (slender sand sedge), Danthonia spicata (poverty grass), Euphorbia corollata (flowering spurge), Galium pilosum (hairy bedstraw), Geum triflorum (prairie-smoke), Hesperostipa spartea (porcupine grass), Koeleria macrantha (June grass), Lechea mucronata (hairy pinweed), Lespedeza capitata (round-headed bush-clover), L. hirta (hairy bush-clover), Liatris aspera (rough blazing-star), L. cylindricacea (cylindrical blazing-star), Lupinus perennis (wild lupine), Monarda fistulosa (wild-bergamot), Opuntia humifusa (prickly-pear), Pinus strobus (white pine), Quercus alba (white oak), Q. velutina (black oak), Rubus flagellaris (northern dewberry), Rubeckia hirta (black-eyed Susan), Sassafras albidum (sassafras), Schizachyrium scoparium (little bluestem), Solidago nemoralis (gray goldenrod), Symphyotrichum oolentangiense (sky-blue aster), S. sericeum (silky aster).


This species likely needs openings and may respond positively to prescribed fire.

General Survey Guidelines

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

Survey Methods

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at [Accessed Aug 18, 2018]


Survey References

Technical References

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