Characteristics of Gymnosperms

• Gymnosperms don't have any protecting covering or shells around their seeds.
• Gymnosperms produce cones.
• Gymnosperms produce different male and female spores. 
• Gymnosperms do not produce fruits.
• Gymnosperms spread their seeds through the wind.

Bibliography:
MANOHAR, Uttara. Gymnosperms.
Available at: http://www.buzzle.com/articles/gymnosperms.html