Nonnative invasive species of southern forests: a field guide for identification and control, James H. Miller, 2003. SRS62, General Technical Rep. Asheville, NC: Southern Research Station, U.S. Department of Agriculture, Forest Service, 93 p.
Plant. Herbaceous, 65-foot (20-meter) long climbing vines that cover trees and shrubs in infestations. stalks with long petioles and heart-shaped leaves that twine and sprawl. spreading by suspending underground tubers and tubers that resemble potatoes at the axils of leaves. Monocots.
Stem. branched, hairless, and twining and covering vegetation For Chinese and water yams, internode cross sections are angled, as opposed to circular for air yams. Reddish and winged water yam nodes. Winter causes all stems to die back, but some little bulbils remain.
Leaves. (Air) alternately or in combination with the opposing (Chinese and water). Thin and hairless, 4 to 8 inches (10 to 20 cm) long and 2 to 6 inches (5 to 15 cm) wide, they can range in shape from heart-shaped to triangular with elongated points. lengthy petioles Broadly rounded (air) or frequently angled basal lobes (Chinese and water). margins are clean. parallel veins that converge at the base. Dark green with lighter green beneath and slightly indented curved veins on top that resemble quilting. Fall sees the brilliant yellowing of Chinese yam leaves.
Flowers. August until May. Rare, tiny, male and female blooms up to 4.5 inches (11 cm) long in the axils, in panicles or spikes on distinct plants White becomes green. Chinese yam has a cinnamon-like scent, making it fragrant (thus the common name cinnamon vine).
seeds and fruit. May to September (and year-round). The most conspicuous fruit are aerial tubers (bulbils), which can number from one to four and are found at the leaf axils and fall to the ground before sprouting into new plants. (Air and Chinese) spherical to oblong (water). Texture ranges from warty (Chinese) to rough (air) (water). Chinese yam are 1 inch (2.5 cm) long, water yam are 1.2 inches (3 cm) long and 4 inches (10 cm) wide, and air yam are up to 5 inches (12 cm) long. Winged seeds and capsules are extremely unusual, and their viability is in doubt.
Ecology. Water yams in Florida, air yams that spread from Florida to neighboring States, and Chinese yams in all States save Florida are all rapidly growing and occur on open to semi-shaded areas. Old vines serve as trellises for new growth while all of them die back during the winter but are still able to cover tiny trees in a year. Spread and thrive by buried tubers and prolific aerial yam production, which drop to create new plants and can travel through water.
resemble greenbrier, Smilax spp., which lacks aerial potatoes but has thorns and green to purple berries. The non-native Zanzibar yam, D. sansibarensis Pax, which is only found in Florida, and the fourleaf yam, D. quaternata J.F. Gmel., which has hairy upper leaf surfaces, are all Dioscorea species that do not produce dense vine infestations or develop aerial tubers (bulbils).
usage and history. introduced as potential food supplies from Africa (by air) and Asia (by Chinese and by water) in the 1800s. Unaware gardeners who are fascinated by the dangling yams frequently distribute ornaments. presently grown for medicinal use.
Recommendation for control measures:
- From July to October, thoroughly spray all leaves with a 2-percent solution of one of the following herbicides: Garlon 3A or Garlon 4. (8 ounces per 3-gallon mix). Sometimes the herbicide is taken up by the air yams; if not, they must be gathered and killed (not composted).
- Just above the soil’s surface, prune climbing plants, and then apply undiluted Garlon 3A to the newly cut stem (safe to surrounding plants).
A climber or a creeper, yam?
Yam plants feature large tubers, which are typically a growth at the stem’s base and frequently have thick, almost bark-like skin. The annual, climbing, long, slender stems with lobed or whole, alternate or opposite, leaves. Long clusters of the monosexual flowers are produced. The flowers are often modest in size and unremarkable on their own, yet spectacular when grouped together. Each has a six-pieced, greenish bell-shaped perianth that covers an ovary with three cells and three wings in the female flowers and six or fewer stamens in the male flowers. Three valves allow the ovary to rupture into a membrane capsule as it ripens, releasing a large number of flat or globose seeds.
A yam is what kind of a plant?
Yams are a monocot (a plant with one embryonic seed leaf) and a member of the Yam family, or Dioscoreaceae. Sweet potatoes, sometimes known as “yams,” are a type of dicot (a plant with two embryonic seed leaves) that belongs to the morning glory family, Convolvulacea.
What height can yams reach?
The robust herbaceous vines known as yams, a monocot related to lilies and grasses, produce an edible tuber.
 They are indigenous to the Americas, Asia, and Africa. A few yams are also invasive plants, frequently referred to as “noxious weeds” outside of places where they are grown.  There are 870 different varieties of yams, and 95% of these crops are farmed in Africa. 
Yam plants have a maximum height of 7.6 to 15.2 cm (3 to 6 in) and a maximum length of 15 m (49 ft).
 The tuber can penetrate the ground up to a depth of 1.5 m (4 ft 11 in).
 The plant spreads via its seeds. 
The edible tuber’s skin is tough and challenging to peel, but it can be easily softened by cooking. The skins range from dark brown to light pink in hue. In mature yams, the majority, or flesh, of the vegetable is made up of a much softer substance that can be white, yellow, purple, or pink in color.
Yam—is it a stem?
Most likely, the yams you are familiar with are not true yams. Actually, your “Yams, sweet potatoes, and regular potatoes all belong to separate plant families. However, they all are frequently farmed for their nutritious starchy belowground plant structures called “tubers. For the plants, tubers serve as store organs and provide energy for regeneration ” (the “eyes or sprouting buds of your potatoes when they sit in your kitchen for too long). Sweet potatoes have “root tubers,” whereas potatoes and yams officially have modified underground stems.
A number of Dioscorea vine species go by the common name “yam” (plant family: Dioscoreaceae). Those are
monocots (related to grasses and lilies). Yams are extensively grown all over the world, but West Africa accounts for 95% of global production. Yams are a crucial crop for times when food is scarce because they can be preserved for very extended periods of time. The length of yam tubers can reach five feet!
The term “sweet potatoes” refers to the morning glory family’s Ipomoea batatas vine species (Convolvulaceae). Most likely, this species is what you will be eating on Thanksgiving. In the US and Canada, sweet potatoes are frequently (and confusingly) “yams. However, sweet potatoes and yams are not even distantly related. As a result, the USDA mandates that any label that includes “yam” also include “sweet potato.” So why are sweet potatoes occasionally mistaken for yams? The term likely originates from colonial times when African slaves observed that some varieties of sweet potatoes resembled yams in Africa.
And finally, “Solanum tuberosum, the traditional potato. The nightshade family (Solanaceace), which includes many other significant crops like peppers, tomatoes, tomatillos, eggplant, tobacco, and more, includes potatoes as a member. Potatoes, the fourth most widely produced crop, are essential to the world’s food supply. Sweet potatoes and potatoes are merely distantly related. They also go by the name “Spuds likely got their name from the word for the shovel used to plant potatoes in holes centuries ago. There are tens of thousands of potato varieties grown all over the world. Around 7,000–10,000 years ago, in South America (Peru), a wild cousin potato species was tamed to produce the domesticated variety. It’s interesting that research on the origins of potatoes included DNA from specimens in a herbarium that were 200 years old! Similarly, using fungal DNA recovered from almost 160-year-old herbarium specimens, the cause of the Irish Potato Famine—caused by a fungus—was also identified!
What plants grow creepingly?
Large and tall plants are trees. Their “trunks” are solid, strong, and made of wood. Numerous branches that contain leaves, flowers, and fruits are sprouted from this one main stem, also known as the trunk. Some trees, like coconut trees, have no branches at all; instead, they have a single primary stem that produces leaves, flowers, and fruits all on its own. A tree has an extremely long life span. i.e., for a long time. Trees include banyan, mango, neem, cashew, teak, and oak.
There are two more plant types, in addition to these three, that require assistance to grow. Particular names for them include climbers and creepers.
Creepers are substantially less developed than climbers. Climbers are unable to stand on their own due to their weak, lengthy, and extremely thin stems, but they can use an external support to climb vertically and carry their weight. These particular plants have unique climbing organs called tendrils. Pea plant, grapevine, sweet gourd, money plant, jasmine, runner beans, green peas, and others are examples of climbers’ plant names.
Creepers are plants that creep across the earth, as their name suggests. They have incredibly brittle, long, thin stems that are unable to sustain their entire weight or stand upright. Watermelon, strawberries, pumpkin, and sweet potatoes are some examples.
A yam grows in what way?
Yams are a very old food crop that have reportedly been domesticated for more than 12,000 years.
They emerge from the ground as twining vines with glossy, heart-shaped, purple-tinged leaves.
Brown-skinned, white-fleshed tubers that can weigh several kilograms. Yams demand an abundant,
a soil with a high organic matter concentration and good drainage. Plant at the start of summer in designated places.
that experience a rainy season. They require a trellis but may grow in either full sun or partial shade. Plants
Before using as food, always peel. Yams can be prepared similarly to potatoes, however they are probably
The flavor is pretty bland and is best cooked. Yam is dipped in batter and fried as tempura in Japan.
When the temperature rises, stored tubers will typically start to sprout. Plant the tuber a few centimeters below the soil’s surface. Plant distance: Leave 50 cm between each plant.
When the vines start to die back in late autumn, the tubers are ready for harvest. Excavate cautiously to prevent
causing skin damage, begin a good distance from the leaf stem. Tubers can be kept for several months.
SORRY however no plants at all can be ordered because of quarantine limitations among Australian States.
the spread of diseases and pests in plants. No strawberries, shallots, potatoes, or tubestock