Casuarina Species, Australian Pine, Dune Sheoak, Horsetail Casuarina, Horsetail She Oak

It's a shame that so many recreation parks in the southern half of florida have these, and they are used as shelterbelts for citrus farms...Read More. I even saw where they are being used as a hedge in west palm beach. You might call it a staple of the south florida landscape because they're hard to miss and are found all over.

What's an even bigger shame however, is that propery owners, the parks, and citrus farmers that do have these....still have them!! The problem is not going to go away if people continue to do nothing. But I suspect some education and perhaps a little law enforcement would do the trick.

Looks like progress is being made in the eradication programs that I saw along US-27 in Broward and Dade counties.

Unfortunately, this invasive, harmful tree does grow in central Florida. It is even worse along the coastline.

Australian Pine, Beefwood, Australian Oak, She-oak, or Horsetail Tree is very invasive in many habitats in coastal central and southern F...Read Morelorida from Cape Canaveral and Saint Petersburg/Tampa Bay southward throughout the Keys, including in my area. I see a lot of these trees growing on the barrier islands, where they interfere with native vegetation, both on the oceanfront (where it crowds out valuable, hardy, salt-tolerant native plants such as sea grapes, sea oats and railroad vines that hold the dune in place and prevent erosion) as well as along the Intracoastal Waterway (where it destroys important mangrove swamp habitat for wildlife by crowding out the native plants such as mangroves and littering the ground with its seedlings, causing it to spread, as well as its needles, which smother up vegetation by forming a thick "mat" above the soil and releasing special chemicals that hurt vegetation, and finally with its roots, that raise the low swamp vegetation by creating small - to- large, highish, sandy ridges so that mangroves can't grow there, also allowing over non-natives such as Brazilian Peppertree to spread) and can compete with some other troublesome exotics and is now banned here in Florida and is on the EPPC Plant List One despite its attractive looks. In some areas, especially further south, I have seen it even more extremely invasive, with hundreds of young, new trees and seedlings sprouting and taking over around the tall adult trees, especially along canals and waterways on its banks, especially in sandy, dry areas. In those areas it is just as or even more worse than Brazilian Peppertree. And even worse, the plant can fall over very easily in hurricanes and damage property and homes and buildings as well as possibly hurt or kill people and wildlife, and also the trees can cause massive erosion along shorelines with it's thick but shallow, invasive roots. If you have these trees, get rid of them as soon as possible, or try to do so!

MORE FACTS - Native to Australia. Tolerates wide range of soils, especially acidic or dry, sandy soils or coastal soils. Grows very quickly. Also naturalized (and invasive) in Bermuda, the Bahamas, the West Indies and Caribbean, Hawaii and on many of the Pacific Islands. In Hawaii and other areas, it is often called 'Ironwood'. It is also sometimes called the 'Whistling Pine' because of the somewhat whispery sounds the needles make when a breeze blows through them.

The trees also grew in Cuba, where I was born. I remember the lovely sound produced as the wind coming from our bay played among the bea...Read Morenches......a unique, long and soft whooooosh that immediately brings childhood memories when I hear it.

As punaheledp says, it is quite invasive also on the Island of Hawaii, though not slated for biological control at this time either.

There is a State Park (McKenzie) in the SE Coastal area of Puna on this island where the trees have taken over......no grass grows and the "pine needles" have formed a thick carpet that covers almost the whole area of the park. An eerie site and feeling as it also cushions most noises. Even though there might be other people around, the whole effect is quite lonely feeling and ghostly.

in Hawaii it is called "ironwood" and is on the pest plant list, though not slated for biological conntol at this time because it is bene...Read Moreficial for windbreak, erosion control and nitrogen fixation. it can grow to 40m and up to 500m elevation. Most commonly seen along shoreline, see lots on windward and north shores. They can be kind of attractive from a distance, but don't want to walk barefoor thru' them on way to beach... the little cones are hard and pokey, ouch.

The Aborigines made a mouthwash from the twigs

It´s a great tree to block wind and dust, specially in coastal areas. Because of this utility, this species of Australian pine became ou...Read Moret of control, since its seeds also are carried away by the winds. That´s how it turned out to be one of the most dangerous species to the coastal ecossystems, taking over the place once ocupied by native species.

As for blocking the wind, other species, preferably native ones, should be planted instead of Casuarina, because there´s no way to control it.

Invasive species. Attempts are being made to eradicate it in Florida.

Australian pine is not a pine, though it has cone-like fruit and wispy bracts of scaly deciduous leaves that resemble needles. It is nati...Read Moreve to Malaysia, Southern Asia, Oceana & Australia. Other common names are Ironwood, Horsetail Tree, She Oak, & Beefwood.

Australian pine can grow 5 to 10 feet per year, sometimes reaching a height of 100 feet, thus producing dense shade. As well, it drops its fruit and leaves, completely covering the ground below, altering the light, temperature, and chemistry of the soil and destroying the habitat.

Australian pine was introduced into Florida in the 1800's to stabilize ditches & canals, as well as producing lumber and affording shade. Unfortunately, the root system is shallow and they blow over easily, the wood tends to shatter when cut into lumber, and the shade it offers excludes all other species from sharing its space.

Australian pine produces copious amounts of small, winged seeds that the wind spreads, and it is able to flower all year long. Introduction into a new environment should be done cautiously.

Australian pine is a deciduous tree with a soft, wispy, pine-like appearance that can grow to 100 feet or more in height. It bears a supe...Read Morerficial resemblance to the conifer genus Pinus because of its small, round, cone-like fruits and its branchlets of scale-like leaves that look like pine needles. Its flowers are tiny, brown and wind-pollinated. The fruit is a nutlet about ½ inch in diameter that contains winged seeds. The ground below Australian pine trees becomes ecologically sterile and lacking in food value for native wildlife. Australian pine occurs in open, coastal strand habitat, characterized by sand and shell beaches, rocky coasts, sand dunes, and sand bars in subtropical climates.