The Lady Slipper newsletter of the Kentucky Native Plant Society has been published since the Society’s founding in 1986. We occasionally feature an article from a past issue. This one, about one of Kentucky’s rarest genera, Hydrolea, first appeared in the fall of 2006, Vol. 21, No. 3. If you would like to see other past issues, visit the Lady Slipper Archives, where all issues from Vol. 1, No. 1, February 1986 to Vol. 34, No. 1, Winter/Spring 2019 (after which we moved to this blog format) can be found.
As a current update to this article, Hydrolea uniflora, the one-flower false fiddleleaf, was observed in full flower at Ballard Wildlife Management Area during the field trip there on July 31, 2021. Read about the field trip and see an image of H. uniflora at the article about the trip; Field Trip to Ballard WMA.
Hydroleas (the genus False Fiddleleaf) in Kentucky – Lost and Found
by Deb White
photo from www.biosurvey.ou.edu
The two species of Hydrolea in the state have both been lost and found within the last few years! Both the ovate false fiddleleaf (Hydrolea ovata) and the one-flower false fiddleleaf (H. uniflora) were reported in the 1960’s to 80’s from several western counties. We had checked all the sites where these wetland plants were reported, and the sites appeared to be extirpated – for instance one had turned into a church. As soon as their ranks1 were changed to “Historic,” meaning they had not been reported for 20 years, they were both found in new places in western Kentucky. Robert Dunlap, a budding botanist and all-around naturalist, found a nice population of H. uniflora in Winford Wildlife Management Area. Julian Campbell reported that H. ovata is found at a wetland site within the Paducah city limits.
photo from www.biosurvey.ou.edu
These are both wetland herbs with blue flowers. H.uniflora forms a rooted mat of creeping decumbent (laying close to the ground rather than erect) stems in shallow open pools in wetlands. The plants are usually less than a foot tall if that and generally bloom in the late summer. H.ovata is much taller,up to 3-4 feet, when it blooms and hard to miss if in flower. It has little spines at the leaf axils and has many branches.
Both of these species occur along the edges of bottomland hardwood swamps and marshy openings in western Kentucky. They are distributed in the southeast United States and into Texas and Missouri. Kentucky is at the northern limit of their ranges, not surprising since this is generally a genus of warm climates.
The number of species that become historic and ultimately extinct in the state give us some insight into the rate of loss of our native flora. To date, Kentucky State Nature Preserves Commission lists 61 historic plants for the state. It is thrilling to find a plant that has not been seen for 20 years and re-assuring to know that the species continues to find its way in our changing world. In fact I am sure there is more Hydrolea out there to be found. If you are interested in knowing what rare plants, including those that are historic, occur in your area please visit our web site, Office of Kentucky Nature Preserves, and visit the Rare Plant Database for the listing for your county or to our rare plant website.
1 Each plant in the Kentucky flora receives a rank expressing its status in the state, from rare to common, historic or even extinct.
Update to the article:
As was mentioned in the introduction above, H. uniflora was observed during the KNPS field trip to Ballard WMA on July 31, 2021. Here are a few images of H. uniflora from that trip.
