348 BOTANICAL NOTES, NOTICES, AND QUERIES. [NovembeV, 



finds tliat the theory of its being due to parasitical growth is correct. A 

 seed of the parasite when placed on the leaf, he finds, will penetrate the 

 tissue in twelve hours, and in sixteen hours it bursts through the leaf, and 

 is ready to reproduce itself at the rate of 19,630 zoospores for every square 

 line of its surface." 



Our northern friends need not be told that we shall give their magazine 

 a cordial reception, for they know tbis ; but their good example may be 

 earnestly commended to the imitation of their southern brethren. 



3. Enteromorpita Hopkirkii. — Our fair and obliging correspondent, 

 of Dorset Gardens, Brighton, sent the following note on Etiteromorpha 

 HopkirJdi. 



Our Huddersfield correspondent, " C, C. P. H.," is hereby informed 

 that the specific name of the above Algal was " bestowed as a tribute of 

 grateful respect to Mr. Thomas Hopkirk, author of ' Flora Glottiana,' from 

 whom Mr. M'AUa had received kindness while resident in the neighbour- 

 hood of Belfast." 



4. The London Flora. — Many kind offers of help in compiling a 

 list of species in the metropolitan counties have arrived from time to time, 

 and the following have been sent since our last issue : — 



'< 18, Shawfield Street, Chelsea, Sept. 4, 1862. 



" Sir, — Allow me to oifer you the following habitats of the rarer plants, 

 which 1 have met with in this neighbourhood during the last two or three 

 years. A note from ' J. W. C in your last led me to suppose that such 

 hints would not be unacceptable. 



"1. Impatiensfulva. Banks of Thames (Surrey side) between Putney 

 and Hammersmith Bridges. Sept., Oct., 1861. 



" 2. Mercm-ialis annua. Gravel-pit near south entrance of Battersea 

 Park. Aug., Sept., 1862. 



" 3. Teesdalia midicaulis. Wimbledon Common. May, 1862. 



" 4. Butomus umbellatus. Paddington Canal, near Kensal Green Ce- 

 metery. July, 1862. 



" 5. Scutellaria galericulata, with Butomus umbellatus, as above. July, 

 1862. 



" 6. Scutellaria minor. Sparingly in damp places on Wimbledon, 

 Wandsworth, and Clapham Commons, and on Hampstead Heath. June, 

 July, 1862. 



" 7. Linaria Cymhalaria. Yery general on walls in Battersea and 

 Chelsea. June, August, 1862. 



"8. Thalictrmn flavtim. Ditch by Thames (Surrey side) near Hammer- 

 smith Bridge. July, 1862. 



" 9. Genista anglica. Wimbledon Common. June, 1862. 



"10. Oxalis comiculata. In waste ground about Chelsea College and 

 Wfst Brompton. June, July, 1862. 



"11. Melilotus letmmtha. Wandsworth Common, by railway. July, 

 1862. 



" 12. Trifolinm subterraneum. Wandsworth Common. June, 1862. 



"13. Orobus tuherosns. Wimbledon Common. May, 1862. 



" 14. Malva rotundi folia. Waste ground, by walls near Putney Heath, 

 Chelsea College. July, 1862. 



