O74 NOTES ON THE FLORA OF HOLSTEIN. 
Sedum reflercum. Common on the gravel hills on the Elbe, below 
Blankenese. 
Sedum Telephium. Common in the hedges round Schenefeld. 
Serratula tinctoria | met with in thickets near Schenefeld. 
Setaria viridis and glauca. Very common among Buckwheat and 
in cornfields round Schenefeld. 
Sisymbrium Sophia. Abundant in the hedges on the high road- 
sides near Altona. 
Sium latifolium. Common in ponds, lakes, and mill-dams, as at 
Pinneberg, Schenefeld, and the Elbe marshes. 
Solanum nigrum. Very common on the roadsides and on rubbish 
heaps, Schenefeld. 
Spirea salicifolia. Met with only once or twice in hedges, 
Schenefeld. 
Malachium (Stellaria) aquaticum. Common in the ditches and 
marshes on the Elbe, below Blankenese. 
Stratiotes aloides. Also frequent in the above station. 
Teesdalia nudicaulis. Met with frequently on the moors, but 
never of any great size. 
Typha latifolia. Common in the lakes, pools, mill-dams, ete., as 
at Pinneberg, Wedel, and Schenefeld. 
Verbascum nigrum. Common on roadsides, Schenefeld. 
Viburnum Opulus. Very common in the hedges. 
Salicornia herbacea. This plant plays a very important part 
in the formation of the marshes on the banks of the 
Elbe. When a bed of mud is deposited in the river to such 
an extent as to be permanently above low-water mark, this 
plant begins to appear, and Prof. Forchhammer supposes it 
to act beneficially in two ways.—l. Mechanically, from 
the rigidity of the stem and branches standing out at right 
angles from it; he says, “‘ It would be impossible to select a 
plant better fitted for preventing the little wave-stroke of the 
daily high tides, and so favouring the growth of the marsh.” 
—2. Chemically, “since it, like all other salt-water plants, 
abstracts from the sea-water the materials generally favour- 
able to plant-growth, and by its decay deposits these in the 
mud.” 
Zostera marina is thrown up in such abundance on the coasts, 
that it is employed in the manufacture of mattresses. 

