322 HYDROCHARIDACEiE ORCHIDACE^. 



ALISMA, L. 



673. A Plantag-o, L. Greater Water Plantain. 



Native ; in or by ponds, ditches, and rivers. Common. July to 

 September. 

 c. I. Seaton Valley. By Sconner Lake. Between Pillaton Mill and 

 Clapper Bridge. Killa. 

 II. Banks of the Tamar, near Calstock ; Keys, Fl. iii. 245. Pool by 

 a lane leading to Antony village from the field-path between 

 Trevol and St Johns. Kingsmill. Pentillie. 

 j>. III. At the mouth of a small stream by Weston Mills Lake, below 

 Barn Copse, 1879. Tamerton Foliot. Warleigh Marsh. 

 IV. Compton, 1844 ; by the river Plym ; Chelson Meadow ; Keys, ih. 

 Laira, 1849 ; specimen, Herh. Gould. In the mill pond be- 

 tween Lipson and Compton village, 1872. Shalaford, Egg 

 Buckland. 

 V. Near Puslmch, &c., in the Yealm Valley. Blackpool. 

 VI. Ivybridge ; Keys, ib. Flete, and between that and Mothecombe. 



HYDROCHARIDACE^. 



EIODIA, Rich. 



674. E. canadensis, Mich. Water Thyme. 



Alien. Very rare. 

 D. IV. In the mill pond between Lipson and Compton village, in plenty, 

 1873, but introduced there some years previous. 



ORCHIDACE^. 



ORCHIS, L. 



675. O. pyramidalis, L. Pyramidal Orchis. 



Native ; on banks about the borders of fields, and in waste rocky 

 or bushy places on limestone ; also on grassy sand-banks on or 

 near the coast. Rare and local. Part of June, July. 



D. IV. In great plenty in a small pasture on the Yealmpton Road, 1858 ; 

 sparingly near Oreston Quarries ; Phyt. v. N.S. 371. Saltram 

 Wood ; near Elburton ; Holmes, Keys, Fl. iii. 228. In 1858 

 the plant was in greater quantity in the pasture situated near 

 Elburton than I have ever seen it elsewhere, but shortly after 

 . the ground was broken and brought into cultivation : I noticed 

 one plant there with nearly white flowers. It occurs in many 

 spots on the limestone beds between the Plym estuary and 



