Glossary of Terms – ‘M’ WORDS Word or Term Definition Macrantha/Macranthus Botanical Latin term meaning larger flowers /Macranthum - macro + anther. Macronutrients Maculata/Maculatum /Maculatus Manure Manure Tea Marginal Plant Maritima/Maritimus /Maritimum Marsh Mealybug Media Meristem Microclimate Six elements that are used in relatively large amounts by plants and are essential for plant growth: nitrogen, potassium, magnesium, calcium, phosphorus, and sulphur. Botanical Latin term meaning spotted or mottled in some colour - sometimes variegated. In gardening terms, manure is decomposed animal waste material; the same way that compost is decomposed plant material. It is used as a soil amendment. Manure dissolved in water, resulting in a liquid organic fertilizer. Plants that will grow on the edges of ponds or lakes. Botanical Latin term meaning from a seashore or maritime area. Soft wet, low lying land characterized by herbaceous vegetation, often forming a transition between land and water. Scale-like plant-eating insect coated with a powdery waxy secretion. They are destructive pests that feed on various plant juices causing curling and contortion of leaves. Botanical Latin term meaning intermediate between two parent taxa. Also used for any substrate (organic or not) used to hold plant roots. The area of actively dividing cells (growing tissue) found at the tips of shoots, roots and in the cambium. All buds contain a meristem. A physical area with a set of conditions different from those in the surrounding area. A very local or small scale climate such as valley or woodland. The variations of the climate within this area, are usually influenced by hills, hollows, structures or proximity to bodies of water (i.e. when it's raining at your house, and the sun is shining on the other side of the street). Gardeners should be aware that Also see..... Microcutting Micronutrients Micropropagation Mid-Rib Mildew Moist Chilling Treatment Mould Mollis Monocotyledon /Monocot Monoecious Morifolium most yards provide a variety of environments for growing plants. A southern exposure has sun all day. A northern exposure may get no direct sun at all. Eastern exposures tend to provide shelter from the hottest rays of the sun. All these factors affect the warmth and humidity of the air in close proximity to a plant. A plant produced by micro propagation - a modern technique using tiny pieces of the parent plant on a sterile nutrient jelly. Used when a limited amount of plant material is available. Mineral elements which are needed by some plants in very small quantities for the proper growth and health. Eight have been identified: iron, zinc, molybdenum, manganese, boron, copper, cobalt, and chlorine. A tissue culture technique for plant propagation in which offspring are cloned from tissue taken from a single plant. The rib or central thick vein running down the centre of a leaf. Mildew is the collective name for a fungus of the variety Erysiphacae. Two popular types are downy mildew and powdery mildew. Although unrelated, both leave a white coating on the leaves. It's affect on plants can be anywhere from mild to devastating. Common to crepe myrtle, zinnias, grapes, and roses - even bee balms. It shows up in cool, wet weather. Drip irrigation can prevent some occurrences. Plant disease resistant varieties (if available) where mildew is a problem. A means of enhancing the germination of some seeds by storing them under moist conditions at low temperatures prior to planting them. A downy or hairy type of fungus found on decaying plant tissue. Botanical Latin term meaning soft. Usually referring to a covering of soft hairs on the leaves and stems. Seedling of flowering plant which has only one leaf when it first germinates. A plant which bears both male and female flowers on the same plant. Botanical Latin term meaning leaves Morphology Mother Block Mulch (folium) like mulberry (Morus). The study of the form and structure of organisms without consideration of function. A certified group of plants used to derive propagation tissues. An organic soil covering such as leaves, straw or peat, placed around plants to maintain soil temperature and prevent the evaporation of moisture, the freezing of roots, and the growth of weeds. Mulch improves soil fertility and structure, reduces pest and disease damage, prevents erosion and can even improve the flavour of crops. Some use it for decorative purposes as well (uniform look to landscape). There are many types of materials that make good mulch.