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Sphenophyta (Equisetum)

Lycopodium and Selaginella, Psilotum, Equisetum

young sporophyte young sporophyte; jointed stem; two sets of whorled leaves on each sporophyte vegetative sporophyte with obvious whorled branches

vegetative sporophyte with obvious whorled branches subtended by whorled leaves (in black) strobilus with whorled sporangiophores and the obvious sporangiphore shield one sporangiophore with meiosporangia on undersides of sporangiophore shield

cross section through stem with carinal canal, valecular canal, xylem, phloem, central air space, parenchyma cells, thickened corners in outer cortex.

far left: showing peltate sproangiophore with sporangiophore shield; sporangiophore attached to stem of strobilus; longitudinal section
near left: one sporangiophore with sporangiophore shield and meiosprangia on underside of sheild; meisopores; hygroscopic ribbons

go to: botany 105 page, word lists for -vascular plants, fungi, algae, bryophytes, pteridophytes, ferns, gymnosperms, angiosperms


young sporophyte	young sporophyte; jointed stem; two sets of whorled leaves on each sporophyte	vegetative sporophyte with obvious whorled branches

vegetative sporophyte with obvious whorled branches subtended by whorled leaves (in black)	strobilus with whorled sporangiophores and the obvious sporangiphore shield	one sporangiophore with meiosporangia on undersides of sporangiophore shield
	cross section through stem with carinal canal, valecular canal, xylem, phloem, central air space, parenchyma cells, thickened corners in outer cortex.
		far left: showing peltate sproangiophore with sporangiophore shield; sporangiophore attached to stem of strobilus; longitudinal section near left: one sporangiophore with sporangiophore shield and meiosprangia on underside of sheild; meisopores; hygroscopic ribbons