184 



The Naturalist. 



never found it. Castle Howard (H. Ibbotson), Linton-upon-Ouse 

 (F. T. Le Tall), Knavesmire (Mr. Backhouse in Newman's Ferns). In 

 1863 the Bootham collectors found it at Heslington. 



Lycopodlum clavatum. — Mr. Baker says — " Frequent upon heaths, 

 ascending from Stockton Forest and Strensall Common." 



Lycopodium inundatum. — Mr. Baker says — '* In many places among 

 the swampy heaths of the low country ; Pilmoor. Stockton Forest, 

 Strensall Common, Welburn Moor, Terrington Carr." 



Lycopodium Selago. — Strensall (Flora of Yorks.) Mr.^ Baker says — 

 " Ascending from the vale heaths to the peak of Micklefell." 



Selagmella selaginoides. — Mr. Baker says — In the Central Valley on 

 Stockton Forest and Strensall Common, and in the Howardian Tract 

 on Welburn Moor and Terrington Carr." 



Pilularia glohulifera. — Ponds near the station at Strensall, pond 

 between Bootham and Gate Helmsley (T. A. Smith), Stockton Forest, 

 near Copsie's Wood, i)ond near the rabbit warren on Tillmire. This 

 and the previous four species must be scarce on Strensall Common ; I 

 have been over it many times, but never seen one of them. 



Isoetes laciistris. — Castle Howard lake (Flora of Yorkshire), 

 according to H. Ibbotson. 



Eqidsetum arvense. — Very abundant. Early frosts cut it. 



Eq^imetmn maximum. — Castle Howard, &c , but not near York. 



Eqidsetum sylvaticum. — Castle Howard (Flora of Y'orks.). Mr. 

 Baker says of North Yorkshire, " area general." 



'Equhetum palustre. — Very common. Bishopthorpe, H'>l)moor, 

 Askham, Strensall, &c. The fertile spikes occur from June to 

 October. The var. nudum is common, and the var. polydacJdou is said 

 to have been found by Bootham collectors in 1847. 



Equisetum limosum. — Hobmoor, Askham, Bishopthorpe, &c., &c. ; 

 y'd,v.fluviatile equally common, Hobmoor, &c. 



Equisetum liyemaLe. — Mr. Baker gives " in the Central Valley at 

 Raskelf, Hazel Bush, near Strensall, and between Topcliffe and 

 Thorpfield." By the Malton-road beyond the Market Weighton 

 Eailway (Flora of Yorks.). I believe the collectors from Bootham 

 have never found this. « 



Chignal St. James, 



Near Chelmsford. 



