What is the flower shape of a sunflower?
With its strong stature, its giant round shape and its brilliant yellow color, the sunflower truly looks like a droplet of golden sun. It’s no wonder its proper name, Helianthus anuus, comes from the Greek words “helios” (or “sun”) and “anthos” (or “flower”).
Is Helianthus annuus a complete flower?
, sunflowers, Helianthus annuus), for instance, the outer (or ray) flowers have a well-developed zygomorphic corolla, and the inner (disk) flowers have a small actinomorphic corolla. The inner disk flowers generally are complete flowers, and the ray flowers generally are sterile.
Why is it called Helianthus annuus?
The term Helianthus is derived from the Greek Helios, meaning sun, and anthos, meaning flower, and from Latin annuus, meaning annual. The property of this flower ‘turning with the sun’ is clearly expressed by the French and Spanish languages when naming this plant.
Are sunflowers Zygomorphic?
The inflorescence of sunflower (Helianthus annuus L.) is heterogamous with zygomorphic ray flowers located in the outermost whorl of the head and actinomorphic disk flowers arrayed in arcs radiating from the center of the head.
Is a Helianthus annuus a perennial?
The genus Helianthus includes the much loved annual sunflower, Helianthus annuus, as well as several perennial species that make great, long-blooming garden plants. These are late-season flowers, blooming at the end of summer and into the fall.
What is a Helianthus mean?
Sunflower
Helianthus definition Sunflower. noun. A taxonomic genus within the tribe Heliantheae — the sunflowers.
Is Helianthus an invasive annuus?
Wild Helianthus annuus is an excellent model species for studying the role of seed banks in the invasion process because it is an invasive alien species, found in ruderal and agrestal habitats in several regions of the world, in some of which it interacts with the domesticated sunflower (Dry and Burdon 1986; Muller et …
Are sunflowers radial or bilateral?
The interesting thing about a sunflower is that it contains both radial and bilateral symmetry. What appear to be “petals” in the outer ring are actually small flowers, or ray florets, which are bilaterally symmetrical. The dark inner ring, on the other hand, is a cluster of radially symmetrical disk florets.
Is sunflower a Bracteate?
Hint:The inflorescence of flowers belonging to the family asteraceae is called floret. It is seen in helianthus annus (sunflower). Complete answer: The floret is located in the center of head, bracteate, actinomorphic, bisexual, tubular, pentamerous.
How do you care for annuus Helianthus?
Water when the soil is dry in the surface (just brush your fingers across it and if it feels dry, add water). Feed with fertilizer every fortnight in summer, but stop feeding in winter. Give it proper light, but don’t set it near sources of heat that would dry the air around it too much.
What is the common name for Helianthus?
Common Sunflower
Common Sunflower (Helianthus annuus L.) Common sunflower is a member of the Asteraceae, the Sunflower family.
What does Helianthus annuus look like?
Helianthus annuus (Common Sunflower) is a tall, fast-growing annual with broad, oval to heart-shaped, roughly hairy leaves. In summer, it produces huge, brilliant flowers, up to 12 in.
What is the difference between Sunflower and Helianthus?
Other similar Helianthus species found here have different leaves (grayish-green in color or shaped differently), are shorter plants, and/or have smaller flowers. Common Sunflowers have many cultivars and are grown as a seed and oil crop, as ornamental garden flowers, and as a wildlife food plant.
What is the scientific name for Helianthus annuus lenticularis?
Helianthus annuus var. lenticularis (Dougl. ex Lindl.) Steyermark Helianthus annuus var. macrocarpus (DC.) Cockerell
What is steamed Helianthus used for?
Steamed buds have an artichoke flavor. More information on Helianthus. Indians ground the seeds into flour and baked into cakes. They applied a poultice of crushed plants to snakebites and also used an infusion of the flowers for chest pains or pulmonary problems.