132 THE JOURNAL OF BOTANY 



SHOBT NOTES. 



PopuLus VTRGiNiANA Foug. — The following note by Dr. Moss 

 on a PopuUcs sent to the Watson Exchange Club by Mr. A. E. 

 Horwood is taken from the Eeport of the Club for 1910-11, 

 p. 310:— "Not P. monilifera Ait. (1789) = P. deltoidea Marsh. 

 (1785), which is very rare in Britain, even as a cultivated tree ; 

 nor is it P. monilifera Mich. fil. (= P. monilifera Loud.), which is 

 the common ' Black Italian Poplar ' of cultivation ; but it seems 

 to be P. virginiana Fougeroux (Mem. Soc. Agric. Par. 1787). I 

 have not seen this description, but I think this is the plant in- 

 tended by Continental writers (e. g. Ascherson and Graebner, Fl. 

 Mitteleur.) by their P. virginiana. Some examples of it in Kew 

 Gardens are named P. marylandica ; but the description of ' P. 

 marylandica Bosc' in Lamarck's Encycl. Suppl. iv. does not fit 

 the plant. This poplar does not appear in any of the British 

 floras or lists ; however, it is subspontaneous in several fenny 

 places in Suffolk, and this, I suppose, must count as its first 

 British record. It is sometimes planted, as on the roadside in 

 West Suffolk between Barton Mills and Icklingham, also in 

 grounds and gardens, as in Cambridge. The following poplars 

 belonging to this group are usually confused by British botanists : — 



(1) P. nigra Linn, (indigenous in southern and eastern England) ; 



(2) P. deltoidea Marsh, (very rarely cultivated in Britain ; indige- 

 nous in N. America) ; (3) P. canadeiisis Moench (the ' Black 

 Italian Poplar ' ; commonly cultivated ; origin unknown) ; and (4) 

 P. virginiana Foug. (cultivated; origin unknown). P. virginiana 

 is usually (? always) a pistillate tree ; P. canadensis is usually 

 (? always) a staminate tree. The above three introduced poplars 

 have 0, 1, or 2 glands at the base of each lamina : these glands 

 are absent in P. nigra. P. deltoidea is slightly ciliate at the 

 margin of the lamina. P. canadensis (the male tree) has terminal 

 leaves which are decidedly less acuminate than those of P. vir- 

 giniana (the female tree)." 



Utricularia ochroleuca E. Hartman. — During last October 

 Professor Hugo Gluck, of Heidelberg, spent a night at my house, 

 and looked through a good many of the aquatic plants in my her- 

 barium. To our surprise, he found that most of my sheets labelled 

 U. intermedia were typical U. ochroleuca ; as a rule, only barren 

 material is present, but the foliage of these two species is quite 

 different enough to separate them readily. They are from the fol- 

 lowing stations, the numbers referring to Watson's vice-counties: — 

 9. Dorset : Morden Decoy (flowering), and Talbot Heath, Bourne- 

 mouth, E. F. Linton. 88. Mid-Perth : Moorland above Crian- 

 larich, at 700 ft. 98. Argyle : Pools and lochs on Eannoch Muir, 

 near Kingshouse, above 1000 ft. 106. E. Eoss : Hill-bog near 

 Garve. at 900 ft. (one flower present), W. A. Shoolbred d- F. T. 

 Marshall. 108. W. Sutherland : Peaty lochan near the eastern 

 base of Quinag, at about 1000 ft. ; moorland pools, west of Loch 

 Hope, not much above sea-level. 112. Shetland : Pools by Loch 



