| Gratiola virginiana |
| Round-fruited Hedge Hyssop |
Key Characteristics
Small annual forb (40 cm) of wet prairies; leaves lanceolate, broadest above middle; flowers white with purple nectar guide lines, tubular, and borne on stout pedicels.
Status and Rank
- State Status: T - Threatened (legally protected)
- State Rank: S1 - Critically imperiled
- Global Rank: G5 - Secure
Occurrences
| County Name | Number of Occurrences | Year Last Observed |
|---|---|---|
| Berrien | 2 | 1991 |
| Cass | 1 | 2003 |
![Occurrence Map for [Sname]](https://webarchive.library.unt.edu/eot2008/20090116110018im_/http://web4.msue.msu.edu/mnfi/maptmp/NFR_Distributions12321033992844.png)
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
Collected on periodically flooded sand flats in southwest Michigan, in sites well-known for many coastal plain disjunct species.
Natural Community Types
Associated Plants
Panic grass (Panicum spretum), soft-stemmed rush, Canada rush, and marsh St. John's-wort, tooth-cup, grass-leaved arrowhead, waterpepper, and spike-rushes.
Management
A status survey is the primary need for this species. If found, it would likely require maintenance of the hydrological regime and protection from disturbances such as ORV impacts.
General Survey Guidelines
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.
Survey Methods
- Meander search
Survey Period: From first week of June to fourth week of September
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
- Deam, C. C. 1940. Flora of Indiana. Department of Conservation, Indianapolis. 1236pp.
- 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.
- Godfrey, R.K. and Wooten. 1981. Aquatic and Wetland Plants of Southeastern United States. Dicotyledons. University of Georgia Press, Athens. 712pp.
- 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.
- Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region, 4th ed. Indiana Academy of Science, Indianapolis. 921pp.
- Voss, E.G. 1996. Michigan Flora. Part III. Dicots (Pyrolaceae-Compositae). Bulletin of the Cranbrook Institute of Science and University of Michigan Herbarium. 622pp.