44. Erythraea capitata (Willd.), _var._ sphaerocephala (Towns.). Isle of Wight. "A form of _E. centaurium_ utterly anomalous in its genus in the insertion of the stamens. A monster rather than a species." (J. D. H.) 45. *Erythraea latifolia (Sm.). On the sandy dunes near Liverpool. "A local form." (J. D. H.) 46. Myosotis collina (Hoffim.), _var._ Mittenii (Baker). Sussex. 47. Veronica officinalis (L.), _var._ hirsuta (Hopk.). Ayr, Scotland. 48. Veronica arvensis (L.), _var._ eximia (Towns.). Hampshire. 49. Mentha alopecuroides (Hull). Nearest to _M. dulcissima_ (Dum.). 50. Mentha pratensis (Sole). Only once found. 51. Chenopodium rubrum (L.), _var._ pseudobotryoides (H. C. Watson). 52. Salix ferruginea (Forbes). England, Scotland. "Probably a hybrid between _S. viminalis_ and _S. cinerea_." (J. D. H.) 53. Salix Grahami (Borr.). Sutherland, Perth. "A hybrid?" (J. D. H.) 54. Salix Sadleri (Syme). Aberdeen. "A hybrid?" (J. D. H.) 55. *Spiranthes Romanzoviana (Cham.). Ireland (N. America). 56. *Sisyrinchium angustifolium (Mill.). Ireland. (Arctic and Temp. N. America.) 57. Allium Babingtonii (Borrer). West England, West Ireland. "A form of _A. ampeloprasum_, itself a naturalised species." (J. D. H.) 58. *POTAMOGETON LANCEOLATUS (Sm.). Anglesea, Cambridgeshire, Ireland. Mr. Bennett writes:--"Endemic! I have taken a good amount of trouble to ascertain this. Nearly 400 specimens I have distributed all over the world with requests for information as to anything like it. The response is everywhere the same, 'nothing.' The nearest to it occurs in the Duchy of Lauenberg but is referable to _P. heterophyllus_." 59. Potamogeton Griffithii (Ar. Bennett). Carnarvon. "Nearest to this is a probable hybrid from N. America, but not identical." (Ar. Bennett.) 60. Potamogeton pusillus (L.), _sub-sp._ Sturrockii (Ar. Benn.). Perth. 61. Potamogeton pusillus (L.), _var._ rigidus (Ar. Benn.). Orkneys, Shetlands. 62. Ruppia rostellata (Koch.), _var._ nana (Bosw.). Orkneys. 63. *Eriocaulon septangulare (With.). Hebrides, Ireland. N. America. 64. Scirpus uniglumis (Link), _var._ Watsoni (Bab.). Scotland, England. "This is a variety of a sub-species of the common _S. palustris_." (J. D. H.) 65. Luzula pilosa (Willd.), _var._ Borreri (Bromf). 66. *Carex involuta (Bab.). Cheshire. "A distinct enough plant but probably a hybrid between _C. vesicaria_ and _C. ampullacea_, found in one place only." (J. D. H.) 67. Carex glauca (Murr.), _var._ stictocarpa (Sm.). Scotland. {363} 68. Carex precox (Jacq.), _var._ capitata (Ar. Benn.). Ireland. "A remarkable plant (monstrosity?) simulating _C. capitata_ (L.)." (Ar. Bennett.) 69. *Carex Grahami (Boott). "A mountain form of _C. vesicaria_." (J. D. H.)