gymnosperm

Any seed-bearing plant of the division Gymnospermae, in which the ovules are borne naked on the surface of the mega sporophylls, which are often arranged in cones. (Source: CED)

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Conway S 2013. Beyond Pine Cones: An Introduction to Gymnosperms. Arnoldia 70 (4) 1-13

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Attachment	Size
Beyond Pine Cones_An Introduction to Gymnosperms_2013.pdf	3.85 MB

Hesse M 1984. Pollenkitt is lacking in Gnetatae: Ephedra and Welwitschia; further proof for its restriction to the angiosperms. Plant Systematics and Evolution 144 (1) 9-16

Website link:http://link.springer.com/article/10.1007/BF00990796

Jacobson N, Jacobson P, van Jaarsveld E, Jacobson K 2014. Field evidence from Namibia does not support the designation of Angolan and Namibian subspecies of Welwitschia mirabilis Hook. Transactions of the Royal Society of South Africa Published online: 28 Aug 2014

Website link:http://www.tandfonline.com/doi/full/10.1080/0035919X.2014.950187#.VGmzQFItBHg

2002. 4.13 Plant diversity.

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Attachment	Size
Fig 4.13 Plant diversity.zip	143.89 KB

Bornman CH, Elsworthy JA, Butler V, Botha CEJ 1970. Welwitschia mirabilis: observations on general habit, seed, seedling, and leaf characteristics. Madoqua 2 (1) 53-66

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Attachment	Size
Welwitschia mirabilis_observations on general habit_seed_seedling_and leaf characteristics.pdf	2.31 MB