extraction of oil from plants is normally done through either distillation or "cold press" method.
distillation involves taking the plant material and boiling it up in water, the boiling water causes the cells to rupture releasing the oil, normally the oil is lighter and floats on the water where it can be removed and then further refined.
cold press method is simply putting the plants through a press where it is squashed to release the plant sap (including the oil), this is then refined to remove the debris and leave just the oil this method is used where high temperature could damage the oil.
You certainly can extract oil from Gumamela flowers. You can extract oil from any flower that is found on Earth for example.
how can i extract color from hibiscus flower
All flowers are plants but not all plants are flowers.
the plants without flowers HAVE no flowers ! and the plants with flowers DO HAVE flowers :P
flowers grow on plants not all plants have flowers
Flowers are plants
Oil extract: 1 cup of mullein blossoms in .5 cup of olive oil. Heat slowly for about 3 hours, strain. Cold Extraction: cover flowers in olive oil and set aside in sun to steep for 7 - 10 days. Strain. And more . . .
Yes the oil is derived from the extract
Non-polar, i imagine. it's used to extract oils from plants, and oil is non-polar.
You can extract castor with an oil extracting machine like a screw oil press.
Flowers are parts of plants.
Oil wells extract oil from far beneath the ground.