any five main characteristics of male cycas cone and female cycas cone
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Male cycas cone:
-it is a compact, woody, a conical or oval structure attached to the tip of the stem by a short stalk.
-Initially, the cone is terminal but later it becomes lateral.
-The cone consists of the central axis which bears many microsporophylls in a compact spiral manner.
-It bears microsporangia on its lower fertile surface
-The upper surface is sterile. There is a long sterile spiny appendage at the distal surface is called apophysis.
Female cycas cone:
- Female cones of Cycas are very large.
-It is formed of megasporophylls. Megasporophylls are loosely arranged to form crowns.
-The upper portion of the sporophyll is pinnate.
-Ovules (megasporangium) are arranged in two rows in the basal half of the sporophyll.
-The whole sporophyll and young ovules are covered by a dense mat of hairs. The ovules loose this hairy covering on maturity. Each ovule is covered by a single massive integument.
-it is a compact, woody, a conical or oval structure attached to the tip of the stem by a short stalk.
-Initially, the cone is terminal but later it becomes lateral.
-The cone consists of the central axis which bears many microsporophylls in a compact spiral manner.
-It bears microsporangia on its lower fertile surface
-The upper surface is sterile. There is a long sterile spiny appendage at the distal surface is called apophysis.
Female cycas cone:
- Female cones of Cycas are very large.
-It is formed of megasporophylls. Megasporophylls are loosely arranged to form crowns.
-The upper portion of the sporophyll is pinnate.
-Ovules (megasporangium) are arranged in two rows in the basal half of the sporophyll.
-The whole sporophyll and young ovules are covered by a dense mat of hairs. The ovules loose this hairy covering on maturity. Each ovule is covered by a single massive integument.
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