GISSING : FLORA OP WAKEFIELD. 



271 



BuTOMUS. Linn. Flowering Rush. 

 B. umhellatus, L. Common Flowering Rush.. P. June — July. Hems- 

 worth Dam (Mrs. Watson), formerley found in the stream below Porto 

 Bello, Wakefield. (Mr. C. F. Tootal.) 



Order— TYPHACE^, 

 Typha. Linn. Cat's Tail, or Reed Mace. 

 T. latifolia, L. Great Reed Mace. P. July — September. Ryhill, Walton, 

 Darfield, &c. 



Sparganium. Linn. Bur Reed. 

 S. mmosum, Huds. Branched Bur Reed. P. July. Frequent. 

 S. simiJlex, Huds. Unbranched Bur Reed. P. July. Stanley Canal. 



Order— ARACE^. 

 Arum. Linn. Cuckoo-pint, &c. 

 A. maculatum, L. Cuckoo-pint, Wake-robin, &c. P. April — June. 

 Common. 



AcoRUS. Linn. Sweet-sedge. 

 A. Calamus, L. Common Sweet-sedge. P. July — September. Winterset, 

 (Mrs. Watson), Sandal, Walton, &c. The root of this plant is much 

 used in perfumes, on account of its delicate aromatic odour. 



Order— LEMNACE^. 

 Lemna. Linn. Duckweed. 

 L. trisulca L. Ivy-leaved Duckweed. A. June — August. Frequent. 

 L. minor, L Lesser Duckweed. A. July. Common. 

 L. polyrhiza. L. Greater Duckweed. A. Alverthorpe. 



Order— NAIAD ACE^. 

 PoTAMOGETON. Linn. Pondweed. 

 P. pedinatus, L. Fennel-leaved Pond-weed. P. June — August. Common. 



The form P. filiformis, occurs in the Barnsley Canal. 

 P. pusillus, L. Small Pondweed. P. July — August. Frequent. 

 P. gramineus, L. Grassy Pondweed. P. July. Barnsley Canal. 

 P. crispus, L. Crisped Pondweed. P. June — August. Common. 

 P. perfoliatus, L, Perfoliate Pondweed. P. July. Near Barnsley. 

 P. prcdongus, Wulf. Long stalked Pondweed. P. July. Canal, Silkstone. 

 P. lucens, L. Shiny Pondweed. P. June — July. Nostel, &c. 

 P. natans, L. Broad leaved Pondweed. P. June — July. Common. 

 Zannichellia. Linn. Horned Pondweed. 

 ' Z. palustris, L. Common Horned Pondweed. A. August. Pond near 

 the Union House, Wakefield. 



(To he continued.) 



