1. Spiral gingers ( Costus spp . ) produce blooms that attract hummingbirds. 2. The Costus gingers offer attractive foliage, unusual flowers and a curious growth habit. 3. It is one of the most commonly cultivated " Costus " species. 4. Costus speciosus, also known as the crepe ginger, can mature to 8 feet.5. The foliage of " Costus barbatus " is dark green and fuzzy underneath. 6. Costus was added unto these, being only twelve " maneh "-weight.7. Koenig was published in 1783, but subsequently determined to be a synonym of " Costus " 8. Ming rulers obtained opium via the costus root, pepper, ivory, rhino horn and peacock feathers. 9. The red flowers at the base are " Costus spectabilis ", Nigeria's national flower. 10. Other plants used include : mat root ( " Costus scaber " ) and given to the bitten.