44 



1324 Mentha Pulegium, L. (Penny Royal) 



1386 Scleranthus annuus, L. (Knowel) 



1460 Thesium humifusum, DC. (Flax-leaved Toad-Flax) 



1529 Hydrocharis Morsus-ranae, L. (Frog-bit) 



1 531 Malaxis paludosa, Sw. (Bog Orchis) 



J S59 Orchis incarnata, L. (Common Marsh Orchis)* 



1 561 latifolia x maculata (Natural Hybrid) 



1581 Crocus officinalis, Huds. (Purple Spring Crocus) 



1665 Typha angustifolia, Linn, (Less Reed-mace) 



1755 Rynchospora fusca, Ait. (Brow Beak-rush) 



1756 ,, alba, Vahl. (White Beak-rush) 

 1758 Schcenus nigricans, L. (Bog-rush) 



1988 Asplenium marinum, L. (Sea Spleenwort) 



1907 Ceterach ofhcinarum, Willd. (Rustybach) 



2007 Lastrea Thelypteris, Bory (Marsh-Fern) 



2008 ,. montana, Moore. (Sweet Mountain Fern) 



2013 Lastrea spinuiosa, Presl. (Narrow Prickly-toothed Shield Fern) 



2031 Equisetum palustre, b. polystachyum, Weigel. Marsh Norsetail) 



2039 Lycopodium inundatum, L. (Marsh Club-moss) 



Reference to Plate I. 



Orchis latifolia x masculata. — This Orchid was found near Edmondsham by 

 Messrs. Linton and Sherring, and is referred to in "Flora of Bourne- 

 mouth" (Linton), page 208, and also 10th Edit. "London Catalogue" 

 under No. 1561. Mr, Linton says, " You may safely call the Orchis, O. 

 latifolia x maculata (I arrange the names alphabetically) though it 

 presents more of the general features of O. maculata than the other 

 parent." 



t PIERID^: DESTROYED BY DROSERA — Mr. R. Vowell Sherring, F.L.S. has reported 

 the folio wing interesting incident. He was on the 20th July. 1911. botanizing in a bog to 

 the south east of Corfe Oastle to Wareham Road, Dorset, when he noticed what he 

 took to be a number of white flowers in the bog. Upon examination these proved 

 to be the wings of Pieris rapse and P. napi, which insects had been captured by the 

 Sundew— Drosera rotundifolia. The most likely explanation for the butterflies 

 having come to an untimely end in this manner that suggests itself to me is 

 the following. The summer of 1911 was abnormally hot and abnormally drv. 

 The Pieridse are a notoriously thirsty family and I had noticed myself at other 

 places that this year they had congregated very much in the bog. The Droseras, 

 especially longifolia and anglica, practically grow out of the water. I think the 

 unfortunate Pierids settled on the plants as being convenient stands from which to get 

 a drink and the Droseras closed on them and devoured them. 



* Mr. R. Vowell ^herring, F.L.S., has establish-d the fact that the nale coloured Orchis at 

 Culease is O. incarnata L. The plant was forwarded to the Rev. E. F. Linton, 

 m.a., and returned as true to type. See Flora of Dorset, 2nd Edit. 1895, page 

 257. 



Acting Chairman : George de Castro, esq., m.r.c.s. eng. 



Owing to the sudden death of Mr. Alexander Scott, b.a., in 

 the month of November, this section was deprived at the very 

 beginning of the winter session of its Chairman, who, from his 

 experience as a distinguished teacher, was so well fitted to lead it to 

 do good work in the Society. 



Amongst the fixtures for the month of December was a paper, 

 to be read at the opening of the session by Mr. Scott himself, on 

 " The System generally adopted by the Romans in the laying out of 

 rural estates, roads, etc." 



