Fig.1.8. Psilotum spp. A, a vertical section of stem apex bearing a young leaf and a sporangiophore; B-C, successive stages in the development of sporangia; D, transverse of a portion of an older sporangiophore and through the time of dehiscence of a sporangium.

Fig.1.8. Psilotum spp. A, a vertical section of stem apex bearing a young leaf and a sporangiophore; B-C, successive stages in the development of sporangia; D, transverse of a portion of an older sporangiophore and through the time of dehiscence of a sporangium.

Fig.1.8. Psilotum spp. A, a vertical section of stem apex bearing a young leaf and a sporangiophore; B-C, successive stages in the development of sporangia; D, transverse of a portion of an older sporangiophore and through the time of dehiscence of a sporangium.

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