Crass I1.—MONOCOTYLEDONES. 
OrpDER L.—TYPHACE. 
Genus CLXXXVI.—TYPHA (Linn.) 
386. T. LATIFOLIA (Linn.), Reed-mace. Rare. 
Loch of Aikerness—probably introduced. It occurs 
only in one patch covering about half-an-acre of the 
swamp, once a loch (Dr Fortescue). 
Genus CLXXXVII.—SPARGANIUM (Linn.) 
387. S. ERECTUM (Linn.), Bur-reed. 
Local, but fairly common in some streams running 
into Loch Kirbuster ; Cleenmar Burn, Orphir ; Harray, 
Birsay, &c. My specimens were gathered near 
Greemeshall. 
388. S. SIMPLEX (Huds.), Bur-reed. 
Scapa Burn (Dr Duguid); Howan, Birsay (Prof. J. 
We f,- Trail). 
389. S. AFFINE (Schnizl.), Floating Bur-reed. Rare. 
Hoy (Syme); Standing Stones of Stenness (M. 
Spence); Sands Water, Walls; Lowrie’s Water, Birsay ; 
and Knitchin Loch, Rousay (G. Searth). 
b. microcephalum (Neum.) This variety grows in 
