List of Illustrations. 



COMMON SCOURING-RUSH. Eqiiiscfnin hientalc. \\n colours.) 



Frantisfu 



SECTION OF SOOURING-RUSH STEM 



JOINT OF SCOURING-RUSH STEM 



SPORE-CASES 



SPORES, ENLARGED ... 



CROSS SECTION OF STEM OF COMMON SCOURING-RUSH 



YOUNG STEMS OF COMMON SCOURINGRUSH 



FERTILE STEM OF COMMON SCOURING-RUSH. Egitisetum hicni 



SHEATH OF GREAT SCOURING-RUSH. K<inisetuni robiistuni 



EQUISETUM FERRISSI, SECTION OF STEM 



EQUISETUM FERRISSI, TIP OF STEM 



SMOOTH SCOURING-RUSH. Eqitisetum lievigatum 



SHEATH OF SMOOTH SCOURING-RUSH ■ 



CATKIN OF SMOOTH SCOURING-RUSH 



BRANCHED EQUISETUM. E.juisctuni Funstoni 



SHEATH OF EQUISETUM FUNSTONI 



CATKIN OF EQUISETUM FUNSTONI 



SHEATH OF VARIEGATED SCOURING-RUSH 



VARIEGATED SCOURING RUSH. Equisdtuni variegatum 



CATKIN OF VARIEGATED SCOURING-RUSH. 



SECTION OF VARIEGATED SCOURING-RUSH STEM 



DWARF SCOURING-RUSH. Eqniscinm scir/a./cs 



SHEATH OF DWARF SCOURING-RUSH 



CATKIN OF DWARF SCOURING-RUSH ■ 



STERILE FROND OF FIELD HORSETAIL. E^uisetiim arvcnse 



FERTILE FROND OF FIELD HORSETAIL 



SECTION OF FIELD HORSETAIL STEM 



WOOD HORSETAIL. EguisetunL silvaticunt. (In colours) 



EQUISETUM ARVENSE DECUMBENS 



EQUISETUM ARVENSE CAMPESTRE 



BUDS AND TUBERS OF FIELD HORSETAIL • 



FERTILE FROND OF IVORY HORSETAIL Eijuisetum tctmateia 



SECTION OF STERILE FROND OF IVORY HORSETAIL 



STERILE FROND OF SHADE HORSETAIL. Eguisctum fratcnse . 



FERTILE FROND OF SHADE HORSETAIL • 



STERILE FROND OFWOOD HORSETAIL. Eijnisctuin silvaticnin 



FERTILE FROND OF WOOD HORSETAIL 



BUDS AND TUBERS OF WOOD HORSETAIL 



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