Bachelor’s Button — Bachelor’s button (Cornflower, Centaurea cyanus, Basket flower, Bluebottle, Boutonniere flower, Hurtsickle) is a small annual flowering plant in the family Asteraceae, native to Europe. It is an annual plant growing to 40-90 cm tall, with grey-green branched stems. The leaves are lanceolate, 1-4 cm long. The flowers are most commonly an intense blue colour, produced in flowerheads …

Azalea — Azaleas are flowering shrubs making up part of the genus Rhododendron. Originally azaleas were classed as a different genus of plant, but now they are recognised as two of the eight sub-genera of rhododendrons – subgenus Pentanthera (deciduous), and subgenus Titsushi (evergreen). One major difference between azaleas and the rest of the rhododendron family is their size. Another …

Avocado — The avocado (Persea americana) is a tree native to Mexico, Central America, and Guam, classified in the flowering plant family Lauraceae. The name “avocado” also refers to the fruit of the tree with an egg-shaped pit. P. americana has a long history of being cultivated in Central and South America; a water jar shaped like an avocado, dating …

Aster — Aster (syn. Diplopappus Cass.) is a genus of flowering plants in the family Asteraceae. The genus once contained nearly 600 species in Eurasia and North America, but after morphologic and molecular research on the genus during the 1990s, it was decided that the North American species are better treated in a series of other genera. After this split …

Aspens — Aspens are trees of the willow family and comprise a section of the poplar genus, Populus sect. Populus. The five typical aspens are all native to cold regions with cool summers, in the far north of the Northern Hemisphere, extending south only at high altitudes in mountains. The White Poplar by contrast is native to much warmer regions, …

Ash, Flowering — An ash can be any of four different tree genera from four very distinct families, but originally and most commonly refers to trees of the genus Fraxinus (from Latin “ash tree”) in the olive family Oleaceae. The ashes are usually medium to large trees, mostly deciduous though a few subtropical species are evergreen. The leaves are opposite …

Arum — Arum is a genus of about 25 species of flowering plants in the family Araceae, native to Europe, northern Africa, and western Asia, with the highest species diversity in the Mediterranean region. They are rhizomatous, herbaceous perennial plants growing to 20-60 cm tall, with saggitate (arrowhead-shaped) leaves 10-55 cm long. The flowers are produced in a spadix, surrounded …

Arbutus — Arbutus is a genus of at least 14 species of flowering plants in the family Ericaceae, native to warm temperate regions of the Mediterranean, western Europe, and North America. North American members of the genus are called Madrones, from the Spanish name madroño. The European species are called Strawberry Trees from the superficial resemblance of the fruit to …

Arborvitae — Thuja is a genus of coniferous trees in the Cupressaceae (cypress family). There are five species in the genus, two native to North America and three native to eastern Asia. They are commonly known as arborvitae (from Latin for tree of life) or thujas; several species are widely known as cedar but because they are not true cedars …

Apple — The apple is the pomaceous fruit of the apple tree, species Malus domestica in the rose family Rosaceae. It is one of the most widely cultivated tree fruits. The tree is small and deciduous, reaching 5–12 m tall, with a broad, often densely twiggy crown. The leaves are alternately arranged simple ovals 5–12 cm long and 3–6 cm …