164 THE JOURNAL OF BOTANY 



Dr. Thellung (/. c. p. 93) includes under L. campestre proper 

 the var. foliosum Rouy & Fouc. mentioned in Journ. Bot. 1910, 

 p. 17. 



In looking over other examples of Lepidium, Dr. Thellung 

 noted the following from my herbarium : — L. heterophyllwn (DC.) 

 Benth. var. leiocarpitm Thell. Near Montrose, Forfar, W. Gardi- 

 ner, Aug. 1843. 



L. densijiorum Schrad. Among garden rubbish, Rugby, June, 

 1898, S. T. Dunn. Waste ground. West Dock Reservation, Hull, 

 v.-c. 61, Sept. 1902, G. Waterfall. 



L. neglectum Thell. Gravel pits near Burford Bridge, Surrey, 

 Aug. 1905, G. E. S. 



L. densiflorum is close to L. virginicum L., as indeed both 

 examples from the above localities had been named by the gather- 

 ers (see Watson Bot. Ex. Club Reports, 1898-99, p. 5, and 1902-3, 

 p. 8). It may be separated from that plant by its compact spike 

 of flowers and smaller seed vessels. 



L. neglectum Thell. is near L. ruderale (as I had called my 

 Burford Bridge plant), but is easily distinguished by its winged 

 seeds and more orbicular silicle. I have since noted the plant 

 from the following localities: — Waste ground. Putney, Surrey, 

 July, 1881, G. G. Druce d W. W. Neioboidd (Hb. Brit. Mus.). 

 Side of Port Meadow, Oxon., June, 1882, G. G. Druce (Hb. Brit. 

 Mus.). Earlston, Wigton, v.-c. 74, 7, 89, coll. Mc Andrew (Hb. 

 A. Bennett). In every case the plant was named L. ruderale. 



Both L. densijiorum and L. neglectum are N. American plants, 

 adventive in Europe, and Dr. Thellung wrote on both my speci- 

 mens : — " In Anglia nondum indicatum " ; in his Monograph, 

 however, under L. densijiorum, one finds the record, which I 

 print as given, — " England : East Greenwich, R. J. Mickfud ['?] 

 R. J., 1878, C. W. Congdon— Herb. Reut. & Barb." 



FLOWERS AND INSECTS. 

 By the Rev. E. Adrian Woodruffe-Peacock, F.L.S. 



The following notes are the outcome of a correspondence with 

 Mr. Charles Nicholson, of Chingford, who is much interested in 

 the cross-fertilization in the long and short styletl forms of Prim- 

 rose and Polyanthus. Observers usually do not begin to collect 

 the facts they require early enough in the year. The hive-bee 

 (A2)is melUjica) and flies (Diptera) were out this year in January ; 

 beetles soon followed ; Lepidoptera and other orders have not 

 been taken yet (March 18, 1911) as visitors to flowers. 



As a result of forty years' interest in this subject, I find insects 

 move pollen from fiower to flower under the following circum- 

 stances : in seeking (1) honey, or (2) pollen ; in (3) sunning (or 

 taking daylight rest '?) ; seeking (4) rest at night or during dull or 

 cold days (sleep '?) ; while taking temporary (5) shelter during 



