Search for ""

Yellowish disc florets (3-10) make up the central part, which is surrounded by 5 petal-shaped ray florets. They bloom from May to October. Yarrow has a dry, one-seeded fruit. Throughout the ages, yarrow has been used to stop blood flow, hence one common name, "nosebleed.

Several plants of family Gentianaceae, of the genus Gentiana, are commonly known as gentian.

Tropical Asian and N Australian pitcher plants of the genus Nepenthes belong to the family Nepenthaceae. The Australian flycatcher (Cephalotus follicularis) of SW Australia is the only species of the family Cephalotaceae.

Plankton [Gk planktos, "drifting"], plants and animals, phytoplankton and zooplankton, respectively, that float freely or drift with currents in oceans, freshwater ponds and lakes.

Popular classification usually divides living beings into plants and animals and, sometimes, microbes. Scientific classification long followed a similar system, with 2 principal kingdoms: the animal order and the vegetable order.

Poison ivy plants can spread by underground stems or seeds. Most are small shrubs (0.5-1 m tall); others are vinelike plants, 15 m or longer, supported by aerial roots. Shrubby forms are sometimes called poison oak.

A herbarium (Lat herba, "herb," formerly any medicinal plant) is a collection of dried specimens of plants mounted on sheets of heavy paper and stored in cabinets or bound in book form, as well as the building that houses such a collection.

Main Forest TypesWorldwide there are 3 main forest types related directly to climatic zones: equatorial- and tropical-region forests, temperate-zone forests, and forests associated with colder climates.

Mint belongs to the mint family (Lamiaceae, also called Labiatae), a large plant family that also includes several aromatic and ornamental plants like basil, rosemary, oregano, thyme, coleus and sage.

Taiga, see Vegetation Regions.

Tamarack, see LARCH.

Indian Pipe (Monotropa uniflora), a perennial plant, is the only native species of genus Monotropa found in Canada.

Mountain Ash (Sorbus) are a genus of small trees or shrubs of the rose family (Rosaceae), consisting of perhaps 100 species distributed in temperate Eurasia and North America.

Hawthorn, small, deciduous tree or shrub of genus Crataegus, family Rosaceae (rose).

Dandelion [Fr, dent-de-lion, "lion's tooth"], perennial, herbaceous plant of family Compositae or Asteraceae.

Plant disease can decrease the economic, aesthetic and biological value of all kinds of plants. Plant pathology (phytopathology) is the study of the nature, causes, prevention and socioeconomic aspects of plant diseases.

The poplar is a short-lived, deciduous, hardwood tree of genus Populus of the willow family, widely distributed in the northern temperate zone.

Ragweed is an annual or perennial plant of the genus Ambrosia, family Compositae or Asteraceae. Fifteen species are native to North America; 3 occur across Canada: common ragweed (A. artemisiifolia), perennial ragweed (A. coronopifolia) and giant ragweed (A. trifida).

Foresters use forest surveys to obtain information on the condition of the FOREST and monitor any changes, since there are not only surveys of standing trees, but also surveys after logging as well as forestry surveys aimed at prescribing treatments.

Bluebell, common name for several plants with bell-shaped flowers of Campanulaceae and Boraginaceae families.