As we move into late summer more species of purple-flowering plants are appearing in the undisturbed woodland and beach areas of Central Florida. Here I detail a few of the many purple-blooming native species that I've encountered recently.
#1. Downy Milkpea(Galactia volubilis)
This twining vine is found in Florida pinelands, hammocks and thickets (or just about anywhere that hasn't been disturbed for a number of years). It blooms year-round, is a larval host for a number of butterflies and has multiple medicinal uses.
Name Galactia from the Greek galaktos "milk," presumably because some of the 140 species of Galactia have a milky sap. Linnaeus who first named this species seems to have had considerable problems with twining legumes. This species he called Hedysarum volubile. Later, Patrick Browne studied the plants in Jamaica, and named the genus Galactia, in 1756. It was not until 1894 that the botanist Nathaniel Lord Britton moved the Linnean species into Galactia. Then as now, this species is mostly overlooked.
The Seminoles used the roots of milk-pea in "Baby Sickness" medications, also for "Cow Creek Sickness," in childbirth, against appetite loss, fever, headache, and diarrhea.
Milk Pea is the larval host plant for Cassius Blue (Leptotes cassius), Ceraunus Blue (Hemiargus ceraunus), Gray Hairstreak (Strymon melinus), Silver Spotted Skipper (Epargyreus clarus) and Zarucco Duskywing (Erynnis zarucco) butterflies.
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#2 Beach Morning Glory
aka Railroad Vine, Bay Hops
(Ipomoea pes-caprae)
The beach morning glory is an herbaceous vine that grows wild on ocean shores from Florida to Texas and Georgia. This plant reaches a height of 4 to 6 inches, but the stems may creep along the ground to a length of 75 feet. It roots and occasionally branches from the nodes and develops a long, thick, starchy root. The 2 1/2- to 4-inch long leaves are thick, smooth, and two-lobed; the leaf shape reminds one of a goat’s footprint or perhaps an orchid tree leaf. The beach morning glory is truly charming when in bloom. Funnel-shaped flowers that are 2 ½ to 3 inches wide occur in the summer and fall. The flowers are pinkish lavender with purple-red throats. They open in the early morning and close before noon each day that the plant is in bloom. Small, round seedpods that contain four velvety, dark brown seeds appear on this plant after flowering.The beach morning glory is well adapted to beaches and coastal dunes. It is useful as a sand binder and ground cover, even on the ocean side of the primary dune. They grow right down to the high tide mark on the beach. Plant on 3-foot centers to quickly form a ground cover. It may not be well suited for home landscapes because it grows too quickly and has a very open growth habit. This full sun plant will prosper on most well-drained soils. It grows very rapidly and needs to be pruned and contained if planted in a landscape. The beach morning glory will tolerate very high levels of salt spray but cannot endure over watering. Basically, plant it, water a few times and leave the sprinkler off.
Ipomoea pes-caprae (goat's foot) so-named from the Greek ips, ipos "worm" or "bindweed" and homios, hoimios, "resembling," referring to the twining habit of the plant. The plant has many names in the Americas. In the Dominican Republic its called "Little Potato," in Cuba and Puerto Rico its Boniato de Playa (Beach Sweet Potato), in the Bahamas and parts of Florida its Bay Hops (Winders). In Veracruz they call it Bejuco de Playa (Beach Vine). In Mesoamerica it is Turtle Vine (Bejuco de la Tortuga). In Belize it is Cowslip. In Haiti it is Hog-food Vine (Liane Manger Cochon) and in the French Antilles it is Wild Beach Potato or Seaside Potato (Patate bord de la Mer or Patate lan Mer). In large parts of the USA it is simply Railroad Vine.
Used against arthritic pain and internal upset, as a purgative and diuretic, and to lower blood pressure it was an important species for Native Floridians. Elsewhere it has been used against "weakness in women," for bathing sores and wounds, as a febrifuge and emollient, and to treat animal stings and bites. Recent studies indicate that Beach Morning Glory contains compounds as effective as Benadryl. So next time you're stung at the beach break off a piece and rub into your bite. Beware, however, in other parts of the Americas the milky sap is used to make a dye so it will stain skin and clothes.
#3 Bay Bean or Seaside Bean
(Canavalia rosea)
In Florida this plant is found in large stands only where there has been little human activity near beaches. This stand was photographed in August of 2017 at Canaveral National Seashore between New Smyrna Beach and Cape Canaveral.
Canavalia is derived from the Malabar common name in India, Kavavali, from kanam, "forest," valli, "climber."
Later it became "Jack-bean" (after 1885 from the Portuguese jaca which was in turn derived from the Malayalam chakka), and "Sword-bean" (from the large, flat shape of the legumes; first applied to Canavalia in 1883.
This plant has so many common names its hard to recount them all. Most refer to the beans it produces in one way or another; Bay Bean, Horse Bean (Bahamas), June Bean (Suriname) Pois Bord de Mer (Guadeloupe and Martinique), Pois Cabrit, Pois Liane (Haiti), Pois Makendal (Makendal's Bean after the Haitian slave revolt mystic), Malfaisants Pois de Mer (Damned Sea Peas), and Pois Zombi (Zombie Bean).
The beans of this species (pictured below) are considered by many to be toxic, containing proteins and alkaloids that if not properly prepared are poisonous. Among the toxic chemicals found in Canavalia are lectins, cyanides, complex proteins, and alkaloids.
No records of C. rosea being used for food have been found in the New World. Only in Asia has it been recorded as food, although there were many records of other species of Canavalia being eaten in the New World.
There are historical records of people feeding the foliage to livestock. In the Caribbean, the seeds are considered toxic and corrosive, but the leaves are used in medicines. "Dicen que ahuyenta las bibijaguas" (they say it expels intestinal worms). In Hispaniola the leaves are used in bitter tonics, and the roots are considered antiblennorrhagic. The plant is also used to treat asthma, although its toxic properties make that unadvisable.
#4 Spotted Beebalm
or Dotted Horsemint, or Horsemint
(Monarda punctata)
#5. Slender Blazing Star
(Liatris gracilis)
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or Dotted Horsemint, or Horsemint
(Monarda punctata)
Horsemint is a 12-18-inch-tall, upright, herbaceous perennial that has long been used by Native Americans to make a "sweating tea." The branched stems of this plant bear opposite, lanceolate to oblong leaves that are 3 inches long. Horsemint produces fragrant, beautiful lavender to pink flowers which are held above the foliage in summer and fall. It is native to moist, coastal upland sites in Florida.
Dotted horsemint was used by the Meskwaki to treat colds and catarrh (runny nose, congested chest) in a mixture with the leaves of Ranunculus delphinifolius (Buttercup) and the disk florets of Helenium autumnal (Sneezeweed). This plant, along with other plants were ground into a powder and snuffed up the nostrils to relieve a sick headache.
Horsemint taken with the roots of Asarum canadense (Wild Ginger), Euphorbia corollata (Spurge), and Brauneria angustifolia (Echinacea) relieved stomach cramps.
The Delaware washed patients' faces with an infusion of dotted horsemint to treat skin problems. They also used an infusion of dotted horsemint to reduce fevers. The Mohegan made an infusion of the plant to reduce fevers as well. The Nanticoke used an infusion of the entire plant to treat colds. The Navajo hung the plant in the hogan for its pleasing odor.
#5. Slender Blazing Star
(Liatris gracilis)
Found in well-drained, undisturbed sites across Central Florida. Blazing Star is becoming rare. Its flowers erupt on 2-4 foot tall stems from August to October. Pictured here these specimen were found in a roadside ditch in southern Volusia County after much searching.
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