Avena is a genus of Eurasian and African plants in the grass family. Collectively known as the oats, they include some species which have been cultivated for thousands of years as a food source for humans and livestock. They are widespread throughout Europe, Asia and northwest Africa. Several species have become naturalized in many parts of the world, and are regarded as invasive weeds where they compete with crop production. All oats have edible seeds, though they are small and hard to harvest in most species.
Smilax is a genus of about 300–350 species, found in the tropics and subtropics worldwide. In China for example about 80 are found, while there are 20 in North America north of Mexico. They are climbing flowering plants, many of which are woody and/or thorny, in the monocotyledon family Smilacaceae, native throughout the tropical and subtropical regions of the world. Common names include catbriers, greenbriers, prickly-ivys and smilaxes. Sarsaparilla is a name used specifically for the Jamaican S. ornata as well as a catch-all term in particular for American species. Occasionally, the non-woody species such as the smooth herbaceous greenbrier are separated as genus Nemexia; they are commonly known by the rather ambiguous name carrion flowers.
Ajuga, also known as bugleweed, ground pine, carpet bugle, or just bugle, is a genus of 40 species annual and perennial herbaceous flowering plants in the Ajugeae tribe of the mint family Lamiaceae, with most species native to Europe, Asia, and Africa, but also two species in southeastern Australia. They grow to 5–50 cm tall, with opposite leaves.
Lolium is a genus of tufted grasses in the bluegrass subfamily of the grass family. It is often called ryegrass, but this term is sometimes used to refer to grasses in other genera.
Zanthoxylum is a genus of about 250 species of deciduous and evergreen trees, shrubs and climbers in the family Rutaceae that are native to warm temperate and subtropical areas worldwide. It is the type genus of the tribe Zanthoxyleae in the subfamily Rutoideae. Several of the species have yellow heartwood, to which their generic name alludes.
Hakea is a genus of about 150 species of plants in the Family Proteaceae, endemic to Australia. They are shrubs or small trees with leaves that are sometimes flat, otherwise circular in cross section in which case they are sometimes divided. The flowers are usually arranged in groups in leaf axils and resemble those of other genera, especially Grevillea. Hakeas have woody fruit which distinguishes them from grevilleas which have non-woody fruit which release the seeds as they mature. Hakeas are found in every state of Australia with the highest species diversity being found in the south west of Western Australia.
Melissa is a genus of perennial herbs in the Lamiaceae, native to Europe and Asia but cultivated and naturalized in many other places. The name Melissa is derived from the Greek word μέλισσα (mélissa) meaning "honeybee", owing to the abundance of nectar in the flowers. The stems are square, like most other plants in the mint family. The leaves are borne in opposite pairs on the stems, and are usually ovate or heart-shaped and emit a lemony scent when bruised. Axillary spikes of white or yellowish flowers appear in the summer.
Ehrharta is a genus of plants in the grass family.
Najas, the water-nymphs or naiads, is a genus of aquatic plants. It is cosmopolitan in distribution, first described for modern science by Linnaeus in 1753. Until 1997, it was rarely placed in the Hydrocharitaceae, and was often taken as constituting the family Najadaceae.
Lactuca serriola, also called prickly lettuce, milk thistle, compass plant, and scarole, is an annual or biennial plant in the tribe Cichorieae within the family Asteraceae. It has a slightly fetid odor and is commonly considered a weed of orchards, roadsides and field crops. It is the closest wild relative of cultivated lettuce.
Cynosurus is a genus of Eurasian and North African plants in the grass family. Plants in this genus are known generally as dogstail grass. They are native to the Mediterranean Basin and neighboring regions, but some have been introduced into Australia as well as North and South America.
Polypogon is a nearly cosmopolitan genus of plants in the grass family, commonly known beard grass or rabbitsfoot grass.
Vulpia is a widespread genus of plants in the grass family, native to many countries around the world and naturalized in many of the nations to which it is not native. It is most common in temperate regions.
Ventenata is a genus of plants in the grass family, native to Europe, North Africa, and central + southwest Asia. One species, Ventenata dubia, is considered an invasive weed in many places.
Hedypnois is a genus of flowering plants in the family Asteraceae.
Reichardia is a genus of plants in the tribe Cichorieae within the family Asteraceae native to the Mediterranean and western Asia. In Crete, Greece the leaves and tender shoots of a variety of Reichardia picroides called galatsida (γαλατσίδα) are eaten raw, boiled, cooked in steam or browned with olive oil by the locals. Brighteyes is a common name for plants in this genus.
Bistorta is a genus of flowering plants in the family Polygonaceae. As of February 2019 about 40 species are accepted. It has been supported as a separate clade by molecular phylogenetic analysis. Bistorta species are native throughout much of the Northern Hemisphere, as far south as Mexico in North America and Thailand in Asia.
Urospermum picroides is a species of flowering plant in the family Asteraceae known by the common name prickly goldenfleece. It is native to Eurasia and it is known as an introduced species in many other regions, including North and South America, Australia, and southern Africa. It grows as a common weed in disturbed habitat. This annual herb grows up to 30 to 50 centimeters tall. It is coated in long hairs and bristles. The bristly leaves are variously shaped, often divided into many sharp-toothed lobes. The inflorescence bears flower heads on thick peduncles. The head is 1 to 2 centimeters long or more and filled with yellow ray florets. It is enveloped in several pointed phyllaries which are covered in bristly hairs. The fruit is an achene well over a centimeter in length which is tipped with a pappus of bristles.
Dysphania is a plant genus in the family Amaranthaceae, distributed worldwide from the tropics and subtropics to warm-temperate regions.
Hedypnois rhagadioloides, the Cretanweed or scaly hawkbit, is a species of plant in the tribe Cichorieae within the family Asteraceae. It is native to the Mediterranean Region and neighboring areas from Canary Islands to Iran, and naturalized in Australia and in parts of the Americas.
