EQUISETUM 615 



plants at Hinksey became much dwarfed — var. hreve, Milde, Mon. Equis. 

 248, but it is only a state. 



Equisetum maximum is recorded for all the bordering counties. 



E. arvense, Linn. Sp. PI. 1061 (1753), and Herb. Field Horsetail. 



E. segetale, Gerard, 952. 

 Top. Bot. 531. Syme, E. B. xii. 152, t. 1889. Nyman, 859. Fl. Oxf. 356, 

 Native. Agrestal. Cultivated and waste ground, railway-banks and 

 sidings. Abundant through the county. P. Fi'uiting stems 

 appear in March. 

 First record. Hinksey, Mr. Baxter, MSS. 1820. 



A very variable species with barren stem varying from four inches 

 to four feet in height, according to situation. 



Var. NEMOROSUM, A. Braun in Doell, Ehein. Fl. 27 (1843) {E. pratense, 

 Roth), is a large shade form found in damp shady situations, as at 

 Wytham and South Hinksey. 



The teeth of the sheath on the sterile stem are broader and not so 

 subulate as in the ordinary plant. 



Var. DECUMBENS, Meyer, Chlor. Hannov. (1836), is a prostrate, 

 caespitose form, not unfrequent on railway-ballast in sandy places, as 

 at Padworth, Sandhurst, and in cornfields. 



Var. RAMULOSUM, Rupr. Beitr. iii. ^^1845) 21, a form compoundly 

 branched, occurs on dry sandy soil, as near Cothill. 



E. ariense is found abundantly in all the bordering counties. 



E. sylvaticum, Linn. Sp. PI. 106 (1753), and Herb. Wood Horsetail. 



E. sijlvaticum, Gerard, 953. 

 Top. Bot. 532. Syme, E. B. xii. 156, t. 189 1. Nyman, 859. Fl. Oxf. 356. 

 Native. Ericetal and sylvestral. Shady woods, damp heathy places. 



Very local. P. Fertile spike appears in April. 

 First record. In ericetorum montanorum locis udis cum Gramine 



tomentoso pone Chilswell, Prof. Dillenius in Herb. Oxf. circa 1730, 



and Sir Joseph Banks in Herb. Brit. Mus. 1760. 



2. Ock. Above Childswell Farm, Dillenius. [Still there.] Bagley 



Wood, Baxt. Stirp. Crypt. Ox. 1828. 



3. Pang. In Oare Wood. In Fence Wood and near Cold Ash 



Common. 



4. Kennet. Aldermaston Woods, near the Decoy. Mortimer West 



Wood and near Aldermaston Soak. Greenham Common. 



5. Loddon. Included iu the Well. Coll. List. Arborfield, Tayler. 



Finchampstead. Sandhurst. 



Var. CAPILLARE (Hoffm. Deutsch. Fl. 3 (1795), as a species), Milde, 

 Nov. Act. xxvi, ii. (1858) 433. In Aldermaston Woods, see the Rep. of 

 Bot. Exch. Club, 1888. Mortimer West Wood. 



E. sylvaticum is recorded for all the bordering counties, but it is 

 probably extinct in Oxfordshire. 



