by Carrie Stevenson | Mar 13, 2018
The swollen base and smooth gray bark of the swamp blackgum are identifying characteristics in wetlands. Photo credit: Carrie Stevenson, UF IFAS Extension
In the river swamps of northwest Florida, the first tree to come to mind is typically the cypress. The “knees” protruding from the water are eye-catching and somewhat mysterious. Sweet bay magnolia is an easily recognizable species as well, with its silvery leaves twisting in the wind. The sweet bay (Magnolia virginiana) is a relative of the Southern magnolia (Magnolia grandiflora) in many of our yards, but its buds and leaves are smaller and it is found most often in very wet soils.
However, the often-unsung trees of the swamps are the tupelo and blackgum trees, including three species of Nyssa that go by a variety of overlapping common names. In the western Panhandle, one is most likely to see a swamp tupelo/swamp blackgum (Nyssa sylvatica var. biflora). The trees are tall—60-100’ at maturity—and have unremarkable elliptical green leaves. However, those leaves turn a lovely shade of red in the fall before dropping in the winter. Their most distinguishing characteristic year-round–but especially in the winter–is its swollen lower trunk, which expands at the base to twice or three times the size of the remaining trunk. These buttresses, also found on bays (more subtly) and cypress (along with knees), are an adaptation to stabilizing a tree growing in large pools of wet, loose soil or standing water.
A young blackgum tree in full fall color. Photo credit: UF IFAS Extension
The swamp tupelo has two more relatives in the region, water tupelo (Nyssa aquatica) and Ogeechee lime/tupelo (Nyssa ogeche), both with hanging edible (but tart) fruit. In the early days of William Bartram’s explorations of Florida, explorers used the acidic Ogeechee lime as a citrus substitute. Typically found in a narrower range from Leon County east to southeast Georgia, the Ogeechee lime is the nectar source for the famous and prized multi-million dollar tupelo honey industry.
Blackgum or tupelo trees (missing the “swamp” in front of their common name—aka Nyssa sylvatica) are actually excellent landscape trees that can thrive in home landscapes. Like their swamp cousins, the trees perform well in slightly acidic and moist soil, although they can thrive even in the disturbed, clay-based soils found in many residential developments. Blackgums can grow in full sun or shade, are highly drought tolerant, and can even handle some salt exposure. Their showy fall color is a nice addition to many landscapes, and the fruit are an excellent source of nutrition for native wildlife.
by Carrie Stevenson | Jan 25, 2018
Ghost plant/Indian pipes emerging from the ground. Photo credit: Carol Lord, UF IFAS Extension
Imagine you are enjoying perfect fall weather on a hike with your family, when suddenly you come upon a ghost. Translucent white, small and creeping out of the ground behind a tree, you stop and look closer to figure out what it is you’ve just seen. In such an environment, the “ghost” you might come across is the perennial wildflower known as the ghost plant (Monotropa uniflora, also known as Indian pipe). Maybe it’s not the same spirit from the creepy story during last night’s campfire, but it’s quite unexpected, nonetheless. The plant is an unusual shade of white because it does not photosynthesize like most plants, and therefore does not create cholorophyll needed for green leaves.
In deeply shaded forests, a thick layer of fallen leaves, dead branches, and even decaying animals forms a thick mulch around tree bases. This humus layer is warm and holds moisture, creating the perfect environment for mushrooms and other fungi to grow. Because there is very little sunlight filtering down to the forest floor, the ghost flower plant adapted to this shady, wet environment by parasitizing the fungi growing in the woods. Ghost plants and their close relatives are known as mycotrophs (myco: fungus, troph: feeding).
Ghost plant in bloom at Naval Live Oaks reservation in Gulf Breeze, Florida. Photo credit: Shelley W. Johnson
These plants were once called saprophytes (sapro: rotten, phyte: plant), with the assumption that they fed directly on decaying matter in the same way as fungi. They even look like mushrooms when emerging from the soil. However, research has shown the relationship is much more complex. While many trees have symbiotic relationships with fungi living among their root systems, the mycotrophs actually capitalize on that relationship, tapping into in the flow of carbon between trees and fungi and taking their nutrients.
Mycotrophs grow throughout the United States except in the southwest and Rockies, although they are a somewhat rare find. The ghost plant is mostly a translucent shade of white, but has some pale pink and black spots. The flower points down when it emerges (looking like its “pipe” nickname) but opens up and releases seed as it matures. They are usually found in a cluster of several blooms.
The next time you explore the forests around you, look down—you just might see a ghost!
by Mary Salinas | Dec 14, 2017
Monarch butterflies. Photo credit: Pia-Riitta Klein.
We have grown to love monarch butterflies, with their striking orange and black markings and their fascinating annual migration from southern Canada 3,000 miles south to Mexico. To help them, we have increasingly planted milkweed, the only plant on which their caterpillars will feed. In northwest Florida, the milkweed species most planted has been tropical milkweed, Asclepias curassavica, as it is lush, showy and easy to grow.
Tropical milkweed, Asclepias curassavica, was visited by this monarch caterpillar who is now off to find a suitable place to make his transformation into a chrysalis. Photo by Mary Salinas, UF/IFAS Extension.
Tropical milkweed, unlike our native milkweeds that die back in late fall, will continue to grow through the winter unless killed by a hard freeze. Even if the cold kills the stems, it may regrow quickly from the roots. This seems like an advantage, but maybe not. The availability of a host plant for the caterpillars may be prompting adult females to stay and lay eggs rather than migrate south and be protected from deadly freezes.
Experts are also exploring links between the longer persistence of the tropical milkweed into winter and a build-up on those plants of a serious parasite Ophryocystis elektroscirrha, commonly referred to as OE.
So, what is the answer?
- Cut back any tropical milkweed to the ground at Thanksgiving. That may encourage female monarchs to migrate and prevent a deadly build-up of OE spores on the plants.
- Consider adding some native milkweed species to your butterfly garden. Here are some recommended species from Dr. Jaret Daniels:
- Aquatic Milkweed (Asclepias perennis)
- Swamp Milkweed (Asclepias incarnata)
- Pinewoods Milkweed (Asclepias humistrata)
- Redring Milkweed (Asclepias variegata)
Swamp Milkweed, Asclepias incarnata. Photo credit: Chris Evans, University of Illinois.
For more information:
Are non-native milkweeds killing monarch butterflies?
Monarch Joint Venture: Potential risks of growing exotic (non-native) milkweeds for monarchs
Monarch Butterfly, Danaus plexippus Linnaeus (Lepidoptera: Nymphalidae: Danainae)
MonarchWatch.org
Gardening Solutions: Milkweed
by Sheila Dunning | Dec 14, 2017
Photo by Sydney Park Brown UF/IFAS
Holly has been considered sacred in some cultures because it remained green and strong with brightly colored red berries no matter how harsh the winter, even when most other plants would wilt and die. According to Druid lore, hanging the plant in homes would bring good luck and protection.
Later, Christians adopted the holly tradition from Druid practices and developed symbolism to reflect Christian beliefs. Today, the red berries are said to represent the blood that Jesus shed on the cross when he was crucified. Additionally, the pointed leaves of the holly symbolize the crown of thorns Jesus wore on his head.
Several holly species are native to Florida. Many more are cultivated varieties commonly used as landscape plants. Hollies (Ilex spp.) are generally low maintenance plants that come in a diversity of sizes, forms and textures, ranging from large trees to dwarf shrubs.
The berries provide a valuable winter food source for migratory birds; however, the berries only form on female plants. Hollies are dioecious plants, with male and female flowers on separate plants. Both male and female hollies produce small white blooms in the spring. Bees are the primary pollinators, carrying pollen from the male hollies 1.5 to 2 miles, so it is not necessary to have a male plant in the same landscape.
Several male hollies are grown for their compact formal shape and interesting new foliage color. Dwarf Yaupon Hollies (Ilex vomitoria ‘Shillings’ and ‘Bordeaux’) form symmetrical spheres without extensive pruning. ‘Bordeaux’ Yaupon has maroon-colored new growth. Neither cultivar has berries.
Hollies prefer to grow in partial shade but will do well in full sun if provided adequate irrigation. Most species prefer well-drained, slightly acidic soils. However, Dahoon holly (Ilex cassine) and Gallberry (Ilex glabra) naturally occur in wetland areas and can be planted on wetter sites.
For a more comprehensive list of holly varieties and their individual growth habits refer to ENH42 Hollies at a Glance: http://edis.ifas.ufl.edu/mg021
by Molly Jameson | Nov 27, 2017
If you are a regular reader of Gardening in the Panhandle, you know that this e-newsletter covers many topics related to ornamental and vegetable gardening, Florida-friendly landscaping, pest management, and lawn and garden fertility.
But did you also know that UF/IFAS Extension in the Florida Panhandle has four other E-newsletters covering topics such as Florida agriculture, wildlife and natural resources, 4-H youth, economic well-being, health and nutrition, and overall life quality for individuals and families?
These other E-Extension in the Panhandle newsletters include Panhandle Agriculture , Panhandle Outdoors, 4-H in the Panhandle, and Living Well in the Panhandle.
[notice]Additionally, UF/IFAS also has an extensive collection of publications on many of these e-newsletter topics. If you haven’t already, check out the Extension Data Information Source (EDIS) website. It is a comprehensive, single-source repository of all current UF/IFAS numbered peer-reviewed publications. Visit EDIS for a complete listing.[/notice]
As a Gardening in the Panhandle enthusiast, here is a list of horticulture and gardening related EDIS publications you might find useful:
Vegetable Gardening
Home Lawns and Landscapes
Soil and Fertility
Pest Management
by Matthew Orwat | Oct 26, 2017
Encroaching brush, whether native or invasive, can be a problem for properties large and small. Fighting woody brush and other hard-to-kill weed species can be challenging for property owners. Many factors affect the effectiveness and efficiency of control efforts.
Timing of the application is a key factor that many property owners fail to consider. The cooler, fall and winter months are an excellent time to control a wide variety of troublesome brush species. With this in mind, the Washington County Extension Agents will be presenting a class, Controlling Brush & Invasive Species on November 9, 2017. The class will focus on plant identification and specific chemical control strategies that are effective in the fall and winter months. Herbicide selection and application techniques will be addressed in detail.
Controlling Brush & Invasive Species will be held at the Washington County Agricultural Center (1424 Jackson Ave., Chipley, FL) on Thursday, November 9, 2017 at 6:30 in the evening. Refreshments and printed reference materials will provided. There is a $5 registration fee for the class, payable at the door. Advanced registration for the class is appreciated. If you have questions or would like to register please contact Mark Mauldin at the Washington County Extension Office (850-638-6180 or mdm83@ufl.edu).
Photo by Sydney Park Brown UF/IFAS