177 



Gymnogramme ochracea, Fresl. Unknown to us, but said to have 

 l^een collected by Gerrard in Natal, and by Bolus in Transvaal. 



Lycopodium dacrydioides, Baker. Said to have been found in Natal, 

 but quite unknown to us. 



EQUISETACEiE. 



This Order contains one genus only, the species are usually found in 

 temperate regions and are rare in the tropics. The steins of several of 

 the species are rich in silica, and are iised for polishing, and sold in 

 Eurox)e in small bundles under the name of " Dutch rushes." 



Equisetum, Linn, 



Stem tall, simple or branching, ribbed. 



The on'y Natal species, usually found in 

 damp places " Mares tails." 



RAMOSISSIMUM, Desf. 



LYCOPODIACE.E. 



This Order includes more than 100 species, many of them aie very 

 difficult to rear in cultivation, except, perhaps, those that grow on rocks 

 or trees. The minute microspores are very inflamable, and are used 

 for several purposes, and some of the species are said to have medicinal 

 properties. 



Capsules uniform, reniform ; 1-celled. Lycopodium. 



Capsules 3-lobed, o-celled. Psilotu.m. 



Lycopodium, Linn. 



Stems erect or sub-erect. 



Stems pendidous. 



Stems procumbent. 



1 Capsules in axils of ordinary leaves all along 



the stem. Saururus, Lam. 



On rocks and trees in Midlands. 

 2 Capsules in axils of ordinary leaves. 



' On trees and rocks in Midlands. 

 2 Capsules in upper parts of stem, the bracts 



|)assing gradually into ordinary leaves. 



On rocks and trees 2000 to 4000 feet alt. 

 3 Fertile stem erect, leafy, branched. 



Moist ground Coast, to 3000 feet alt. 

 3 Fertile stem erect, nearly naked, branched. 



Wet places in Midlands. 

 3 Fertile stem erect, nearly naked, unl)ranched. caroltnianum, Linn. 



Very wet places, Coast to 3000 feet alt. 



VERTICILLATUM, Linn. 



GXIDIOIDES, Linn. 

 CERNTJUM, Linn. 

 CLAVATUM, Linn. 



PsiLOTUM, ISwartz. 



Rhizome wiry, creeping, stems 3-angled, almost 

 leafless. 

 On old trees in Coast districts ; rare. 



TRIQUETRUM, SlV 



