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The following other wikis use this file: Usage on fi.wikipedia.org Keskustelu käyttäjästä:Harriv; Käyttäjä:Ppntori; Keskustelu käyttäjästä:Ppntori
Helianthus (/ ˌ h iː l i ˈ æ n θ ə s /) [3] is a genus comprising around 70 species of annual and perennial flowering plants in the daisy family Asteraceae commonly known as sunflowers. [ 4 ] [ 5 ] Except for three South American species, the species of Helianthus are native to North America and Central America .
The plant has an erect rough-hairy stem, reaching typical heights of 3 metres (10 feet). The tallest sunflower on record achieved 9.17 m (30 ft 1 in). [3] Sunflower leaves are broad, coarsely toothed, rough and mostly alternate; those near the bottom are largest and commonly heart-shaped.
A sense of urgency has developed in documenting today's plant life for future generations. Original botanical illustrations rendered in traditional media (with which art conservators are more familiar) can and might serve as reference research materials for endangered species and climate change .
Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
It is a host plant for the larvae of the Bay checkerspot butterfly, a threatened species. Encelia californica is cultivated by specialty nurseries as an ornamental plant, for use in native plant and wildlife gardens, and natural landscaping projects. It is drought tolerant but not frost tolerant, and needs full sun.
People looking to save money for a big trip or financial investment may want to make plans around an "extra" paycheck in their pocket.. Employees who get paid on a biweekly basis (every other week ...
Helichrysum species are used as food plants by the larvae of some Lepidoptera species including the bucculaticid leaf-miners Bucculatrix gnaphaliella (which feeds exclusively on Helichrysum arenarium) and Bucculatrix helichrysella (feeds exclusively on H. italicum) and the Coleophora case-bearers C. caelebipennella, C. gnaphalii (feeds ...