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Asparagus is the name of a genus of plants, a member of the family Asparagaceae (formerly placed in the Liliaceae). There are up to 300 species, all from the Old World, introduced in many countries in both hemispheres and throughout temperate and tropical regions. Many species from Africa are now included in the genera Protasparagus and Myrsiphyllum. However, recent studies have shown that the taxonomic level genera may not be appropriate; instead, division into subgenera or no division at all may be more appropriate. They range from herbs to somewhat woody climbers. Most species have flattened stems (phylloclades), that serve the function of leaves. Three species (Asparagus officinalis, "Asparagus schoberioides and Asparagus cochinchinensis) are dioecious species, i.e. with male and female flowers on separate plants. The others may or may not be hermaphroditic. The best known member of the genus is the vegetable asparagus (Asparagus officinalis). Other species of asparagus are grown as ornamental plants. Some species such as Asparagus setaceus have branches that resemble 'ferns', hence they are often called "Asparagus fern" (though they are not true ferns). They are often used for foliage display, and as houseplants. Commonly-grown ornamental species are Asparagus plumosus, Asparagus densiflorus, and Asparagus sprengeri. Some other species have been introduced as weeds. Species include the following;
Pests and diseases Weed Bridal Creeper, Asparagus asparagoides, is a major weed species in southern Australia. It was introduced to Australia from South Africa around 1857, for use as a foliage plant, especially in bridal bouquets (hence the common name). It has escaped into the bush and smothers the native vegetation with the thick foliage and thick underground mat of tubers which restrict root growth of oher species. It is recognised as one of the 20 "weeds of national significance". The seeds are readily spread in the droppings of birds, rabbits and foxes, as well as the plant extending its root system.• CSIRO have introduced several biological controls in an attempt to reduce the spread and impact of the weed.• | |||||||||||||||||||||||||||||
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