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Sunflower
Asteraceae
Helianthus annuus


gardengeek
gardengeek

Asteraceae Family

Helianthus Genus

Location

This specimen was found in Utah.

Physical Description
The outer florets are the sterile ray florets and can be yellow, maroon, orange, or other colors. The florets inside the circular head are called disc florets, which mature into what are traditionally called "sunflower seeds," but are actually the fruit (an achene) of the plant. The inedible husk is the wall of the fruit and the true seed lies within the kernel.




Sunflower , Helianthus annuus - YouTube.com

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Asteraceae
Asterales
Asterales
Star Order (Daisies)
Euasterids II
Euasterids II
Real Stars Group Two
Asteridae
Asteridae
Class of Stars (Daisies)
Core Eudicots
Core Eudicots
Main, Real, Two First-Leaves (Dicots)
Eudicots
Eudicots
Real, Two First-Leaves (Dicots)
Mesangiospermae
Mesangiospermae
Half Capsule Seed Division
Magnoliophyta
Magnoliophyta
Magnolia Division
Spermatophytes
Spermatophytes
Seed Plants
Euphyllophytina
Real Land Plants
Polysporangiates
Multiple Spore Sub-Kingdom
Stomatophytes
Stomatophytes
Air Pores Sub-Kingdom
Embryophytes
Embryophytes
Multicellular Land Plants
Streptobionta
Streptobionta
Multicellular Plants
Plantae
Plantae
Plants
Eukaryota
Eukaryota
Cells with a Nucleus


General Information

The term "sunflower" is used to refer to all plants of the genus Helianthus, many of which are perennial plants.

The florets within the sunflower's cluster are arranged in a spiral pattern. Typically each floret is oriented toward the next by approximately the golden angle, 137.5°, producing a pattern of interconnecting spirals where the number of left spirals and the number of right spirals are successive Fibonacci numbers. Typically, there are 34 spirals in one direction and 55 in the other; on a very large sunflower there could be 89 in one direction and 144 in the other.This pattern produces the most efficient packing of seeds within the flower head.


Sunflowers in the bud stage exhibit heliotropism. At sunrise, the faces of most sunflowers are turned towards the east. Over the course of the day, they follow the sun from east to west, while at night they return to an eastward orientation. This motion is performed by motor cells in the pulvinus, a flexible segment of the stem just below the bud. As the bud stage ends, the stem stiffens and the blooming stage is reached.

The wild sunflower typically does not turn toward the sun; its flowering heads may face many directions when mature. However, the leaves typically exhibit some heliotropism.

Sunflower oil, extracted from the seeds, is used for cooking, as a carrier oil and to produce margarine and biodiesel, as it is cheaper than olive oil. A range of sunflower varieties exist with differing fatty acid compositions; some 'high oleic' types contain a higher level of healthy monounsaturated fats in their oil than even olive oil.

Sunflower Oil is the best oil for "Oil Pulling" an ancient practice of swishing oil in the mouth to pull out toxins, and maintain health.


Sunflowers also produce latex and are the subject of experiments to improve their suitability as an alternative crop for producing hypoallergenic rubber.

The sunflower is also the symbol of the Vegan Society.
one of the national emblems of Russia.

The following are varieties of sunflowers
* American Giant Hybrid
* Arikara
* Autumn Beauty
* Aztec Sun
* Black Oil
* Dwarf Sunspot
* Evening Sun
* Giant Primrose
* Indian Blanket Hybrid
* Irish Eyes
* Italian White
* Kong Hybrid
* Large Grey Stripe
* Lemon Queen
* Mammoth Sunflower
* Mongolian Giant
* Orange Sun
* Peach Passion
* Red Sun
* Ring of Fire
* Rostov
* Skyscraper
* Soraya
* Strawberry Blonde
* Sunny Hybrid
* Taiyo
* Tarahumara
* Teddy Bear
* Titan
* Valentine
* Velvet Queen




Sunflower - Plant
Sunflower - Plant - July 23, 2009



Sunflower - Plant
Sunflower - Plant - July 23, 2009



Sunflower - Plant
Sunflower - Plant - July 23, 2009



Sunflower - Plant
Sunflower - Plant - July 23, 2009



Sunflower - unknown - Plant
Sunflower - unknown - Plant - July 03, 2009



Sunflower - unknown - Plant
Sunflower - unknown - Plant - July 03, 2009

Comment: Sunflower , Helianthus annuus

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