240 UMBELLIPERAE 



The submerged leaves are of large size and often very beautifully 

 dissected ; it w^as probably this state of the plant which was recorded 

 as * Slum medium foliis eleyantissime clissectls. In some ditches about 

 Oxford,' in Merrett's Pinax, 1 666. I have seen these finely cut submerged 

 leaves as early as January. 



A form of the plant has been gathered near Port Meadow and in the 

 large meadow at Abingdon, in which the bracteoles were so much 

 developed as to be foliaceous, while the segments of the stem leaves 

 were much narrower than usual and much more dentately cut. 

 Another form was seen under Wytham woods, with very narrow leaf 

 segments ; the plant before flowering much resembled Cicuta virosa ; it 

 is the var. angustatum, Doell, Fl. Bad. 1007 (1857). 



Siam latifolium occurs in all the bordering counties. 



S. erectum, Huds. Fl. Angl. 103 (1762). Water Parsnep. 



S. angusfifolium, Linn. Sp. PI. 1672 (1762). Berula angustifolia, Mert.. 



& Koch, in Deutsch. Fl. 2, 433. 

 Top. Bot. 193. Syme, E. B. iv. 118, t. 588. Nyman, 304. Fl. Oxf. 138. 

 Native. Paludal. Ditches, streams, &c. Rather common and widely 



distributed, but not so common near Oxford as the preceding 



species. P. July-August. 

 First record. S. angusti/uliurn, South Hinksey, Mr. Baxter, MSS. 1825. 



Included by Mr. T. B. Flower in Robertson's Env. of Reading, 1843, 



but without locality. 



1. Isis. Cum nor. Appleton. Near Lechlade, &c. 



2. Ock. In a ditch near the footpath leading from the Tollgate 



beyond Folly Bridge to South Hinksey, Baxter. Marcham, 

 Walker. Shippon. Abingdon. Cothill. Uffington. Wantage. 

 Lockinge. Hagborne. Meadow near Radley. 



3. Pang. Bradfield. Pangbourn. Moulsford. 



4. Kennet. Mortimer, Tufnail. Beenham. Theale. Newbury. 



5. Loddon. Shiplake, Stanton. Wargrave, Melvill. Near Windsor, 



Bolton King. Jouldern's Ford. Coleman's Moor. Twyford. 

 Ruscombe. Shurlock Row. Early. Wokingham. Waltham. 

 Wellington College. 

 S. erectum occurs in all the bordering counties. 



AEGOPODIUM, Linn. Gen. n. 330. 



Ae. Fodagraria, Linn. Sp. PL 265 (1753'. Gout Weed, Herb Gerard, 



Ground Elder. 



Podagraria, Rivinus, Pent. Irr. 47. Aegopodium, Tabernaemont. 

 Top. Bot. 191. Syme, E. B. iv. 108, t. 580. Nyman, 305. Fl. Oxf. 139. 

 Denizen or native. Septal. Hedges, waysides, and spinneys, near 



