112 THE FLORA OF HALIFAX. 



Sparganium simplex, Huds.— 99. Bur-reed. 



Native. British type. P. July-August. 

 In the old Cut, opposite Sterne Mill. -Herb. Leyland. 

 1862. Old Canal, Norland.— S. King; MialW Flora. 

 Rare, only in the dam of the soap works between Sterne 



Mill and Norland. 



AROIDE^ 



Arum maculatum, L.— 84. Cuckoo-pint, Lords & Ladies. 



Native. English type. P. May. 

 1832. Common about Luddenden. — Herb. S. King. 

 1867. Shibden.— J. Walker. 



Infrequent, in woods; Sun Wood, Lightcliffe ; Hipper- 

 holme; Elland Park Wood; Hollins Wood, Warley ; 



Hebden Bridge ; and no doubt elsewhere, but not 



abundant, and chiefly in the eastern part. 

 Acorus Calamus, L. — 31. Sweet Flag. 



Denizen. English type. P. July- August. 

 1862. Mill dam, Luddenden Foot, formerly planted.— 



C. Eastwood ; MiaWs Flora. 

 Still in Clay's mill dam ; the aromatic root stock, known 



as " flag root " is sought after by boys to chew. 



L.EMNACE.&]. 



Lemna trisulca, L. — 73. Duckweed. 



Native. English type. A. June-July. 

 Rare, only observed in the canal at Salterhebble 1 1888). 

 Lemna minor, L. — 106. Duckweed. 



Native. British type. A. June-July, 

 1867. Shibden.—/. Walker. 



Infrequent, in ponds and stagnant waters at low levels : 

 Tag Lock, Elland ; canal at Salterhebble ; North Dean 

 Wood ; and Copley. 



ALISMACE^l. 



Alisma Plantago-aquatica, L. — 100. Water Plantain. 



Native. British type. P. July. 

 1830. In the canal at Salterhebble. — Herb. S. King. 

 1867. In the canal below the Wharf, and in the dam at 



Lee Bridge.—/ Walker. 

 Chiefly in the canal, at Tag Lock and Salterhebble ; also 



in mill dams at West Vale and Bowers' Mill, Barkisland, 



all below 450 feet. 



