26 The Scottish Naturalist. 



353 albida Rich., B. Scalpa, near mill of Sebay, Bridge at Crantit, 

 1 20 yards from H., Swanbister. Scarce, but apparently pretty 

 generally distributed over the Mainland. 



Habenaria Br. 



354 viridis Br. Houton and Barnosie, B. Common D. I have 

 seen it only at the Standing Stones of Stennis. 



Listera Br. 



355 cordata Br., B. Hoy, Evie, &c, D. ; Rousay, Orphir, H. ■ 

 Walls, not rare. 



356 ovata Br. "Pastures rare; between Seater and sea-shore D. 

 Quendal, Rousay, G. Robson." D. and H.'s list. Harray, 

 hardly rare, J. W. H. T. 



IRIDACE^E. 

 Iris L. 



357 Pseudacorus L., B. Common. 



LILIACE-^. 



SCILLA L. 



358 verna Huds., B. Common. 



Narthecium Huds. 



359 ossifragum Huds., B. Common. 



Note.— B. stands for Dr. J. T. Boswell, of Balmuto ; D. for Dr. A. R. 

 Duguid ; H. for Mr. Robert Heddle ; and J. W. H. T. for Dr. James W. H. 

 Trail, in the above list. 



{To be continued.) 



MEMORANDA OP A SUMMER'S WORK ON THE 



POTAMOGETONACEJG IE PERTHSHIRE. 1882. 



By A. STURROCK. 



The following extracts from my note-book may interest the botani- 

 cal readers of the Naturalist. It will be seen that they fully bear 

 out the opinion I expressed in these pages two years ago, that a 

 rich harvest of plants remained to be gathered in our lochs and 

 streams. 



July 6th. — Glenballoch Moor, in the parish of Rattray. 

 P. polygonifolius Pour. 



var. ericetoruiti Syme ; fide Bennett. 



A very tiny form. Abundant in the water-courses of a small 

 bog on the moor. 



