According to Northwest Missouri State University, a leaf can be simple or compound. This is determined by the leaf’s blade and petiole attachment. Simple leaves have buds that are located where the petiole meets the stem of a single leaf. Compound leaves have the same petiole attachment, but are divided into multiple sections and can be palmate, pinnate or bipinnate. Leaves are also categorized by edge and blade shape.
Palmate leaves are composed of small leaflets that connect at a shared point and spread out like the fingers on a hand. Pinnate leaves have a center nerve, the midrib, with attached nerves that fan out like a plume. Bipinnate leaves are pinnate leaves that are divided into two halves.
Leaves with wavy edges are called sinuate leaves, while the edges of entire leaves are smooth. The edges of dentate leaves look like teeth, and serrate leaves are saw-like. Lobed leaves have rounded divisions that do not reach the center. Blades that are shaped like spears are called lanceolate, and blades shaped like needles are called acicular. Egg-shaped leaves, also referred to as ovate, have wide bases. Linear leaves have blades with a length that is much longer than their width. Elliptical leaves have a width that is two to three times shorter than their length.Learn More
Mushrooms, mildew and yeast are all types of fungi. Of the estimated 1.5 million types of fungi, approximately 300 of them are known to cause health problems in humans, according to the Centers for Disease Control.Full Answer >
According to Colorado State University, the parts of a leaf can be divided into internal features and external features. The internal features of a leaf include the epidermis, the cuticle, leaf hairs, the palisade layer, chloroplasts, the vascular bundle, spongy mesophyll, the stomata and guard cells. The external features include the leaf blade, the petiole and the stipules.Full Answer >
Tea tree oil is extracted from the leaves of the tea tree, which is a tree that is native to the eastern part of Australia. In research settings, tea tree oil has shown the potential to treat conditions like acne, lice, scabies and fungal infections, such as athlete's foot, herpes, insect bites and dandruff, and it may have antimicrobial properties as well, according to WebMD.Full Answer >
To identify an unknown flowering shrub, consider the size and shape of the leaves and the color, size and shape of the flower. Use these characteristics to search for a match in a plant database or consult an expert at a nearby garden center or nature preserve. To locate databases of plants likely to grow in the area, consult state agriculture organizations, nearby nature preserves or local university extension programs.Full Answer >