134 THE JOURNAL OF BOTANY 



and seventy new for their respective districts. These numbers 

 are exclusive of casuals. Unestablished aliens that seem likely 

 to spread are listed. It seems desirable to have a note of the 

 appearance of such plants, as they may become in the future real 

 competitors with the native plants. Several aliens have become 

 thoroughly established and have spread widely during the last ten 

 years. For example, Matricaria suaveolens now occurs abundantly, 

 not only in the neighbourhood of towns and villages, but also far 

 from cultivated areas. Lycium is also greatly on the increase. 

 Sisymbrium pannonimtm, of which a single plant was first seen 

 as a roadside alien near Eowsley in 1910, is now abundant in 

 many other places, and is established in its first mentioned 

 station. A curious feature in the Chesterfield district is the dis- 

 appearance of Senecio Jacohma from many fields and tracts of 

 waste land where it was extremely abundant a few years ago. 

 The disappearance has been very rapid and is difficult to account 

 for. On the other hand certain plants have become common 

 in districts where they were formerly unknown ; thus, in the 

 Chesterfield district Einlohium roseum was apparently absent 

 until a few years ago, but is now quite common. 



Clematis Vitalba L. Does not appear to be native anywhere. 

 It is occasionally cultivated, as at Spital (C), and is becoming 

 naturalised at Matlock (L). That it does not occur as a native 

 of the Limestone districts is rather surprising. — Banunculus 

 fluitans Lam. var. Bachii (Wirtg.). (^'^Y) Hope.— i?. peltattis 

 Schrank. (L) Arborlow. — B. Lenormandi F. Schultz. (G) Stanage. 

 — B. kederaceus L. (C) Nether Loads. — Helleborus fcetidus L. 

 First recorded from Matlock in W. H. Purchas' MS. list (1865) ; 

 it still grows freely there. 



Berberis V2tlgaris L. Very rare, and when it does occur it is 

 generally in shrubberies ; (C) Spital, Hasland ; (G) Kiber. 



CorydaUs claviculata DC. (C) Wingerworth Bole Hill. — 

 Fumaria Borcsi Jord. (C) Totley. Only once previously recorded 

 for the county. 



Badicula Nasturtium-aquaticum Kend. & Brit. var. siifolia 

 Druce. (^^G) Nether Loads.— ylra^^'s hirsuta Scop. (G) Ashover 

 Hill Top. — A. albida Stev. (''C) Established near Stretton. — 

 Erophila verna E. Meyer. (L) Milltown.— Coc/z/caria alpina Wats. 

 (L) Middleton-by-Wirksworth. — Sisymbrium pannonicum Jacq. 

 (-C) Waste ground at Calow. — \ Sisymbrium Columnce Jacq. ('''C) 

 Waste ground at Calow. — \Brassica Butabaga DC. (=''L) Eyam. 

 — Thlasjn arvense L. ("C) Calow. — Iberis amara L. (=''C) Waste 

 ground near Chesterfield. With the ordinary form were curious 

 psedogenetic plants about 1 inch in height, bearing from 1 to 3 

 flowers. — Baphanus Baphanistrum L. (G) Dethick. 



Beseda lutea L. ('-^L) Middleton-by- Wirksworth.— i?. Luteola L. 

 (L) Milltown. 



Helianthemum Chamcecistiis Mill. (P) Stoney Houghton. 



Viola odorata L. (P) Glapwell ; (L) Ashover, the blue flowered 

 plant ; the white flowered plant is generally commoner in North 

 Derbyshire.— f F. nemorosa Neum. W. & M. (-C) Wingerworth.— 



