OENANTHE 247 



the greater portion of the Loddon district it is too abundant to need 

 the mention of localities. All the bordei'ing counties are recorded for 

 it, but it is very rare and local in Oxfordshire, being practically confined 

 to the county near Caversham, and is not found in E. Gloucestershire. 



Oe. Phellandrium, Lam. Fl. Fr. iii. 432 (1778). Water Horsebane, 

 Water Hemlock. 



Oe. aquatica, Poir in Lam. Enc. Meth. iv. 530 (1797). Phellandrium 

 aquaticmn, Linn. Sp. PI. 255 (1753). Phellandrium, Tournefort. 



Top, Bot. 198. Syme, E. B. iv. 130, t. 598. Nyman, 297. Fl. Oxf, 133. 



Native. Uliginal. In pools and ditches of stagnant water and in 

 marshes. Very local. Curiously rare or absent from the Isis 

 and Ock districts. P. June-August. 



First record. P. aquaticum, Water Hemlock. Rivers and ditches, 

 Mavor's Agr. Berks, 1809, but this is probably a mistake for the next 

 species. It is definitely recorded by Mr. G. G. Mill, in Phyt. i. 987, 



1843. 



3. Pang. In a pond between Tilehurst and Calcot Park. 



4. Kennet. In Southcote Moat. 



5. Loddon. Ponds at the foot of Cookham Down, Mill, I. c. Bul- 



marsh. White Knight's Lake, Tufnail. Near Wellington 

 College, Penny. Near Windsor, Dyer in Phyt. (1862-3) 528. 

 Wargrave, in Holme's Lane, Melvill. Ruscombe. Broadwater. 

 Waltham. Near Shottesbrooke. Abundant on Coleman's Moor. 

 Hurst. Winkfield. Abundant in a wood between Shurlock Row 

 and Shottesbrooke. Near Henley. 

 Rather frequent on the London Clay in this district. 

 Oe. Phellandrium is recorded for .all the bordering counties except 

 Wilts. 



Oe. fluviatilis, Coleman, in Ann. and Mag. Nat. Hist. xiii. (1844) 188. 

 Top. Bot. 196. Syme, E. B. iv, 131, t. 599. Nyman, 297. Fl. Oxf. 134. 

 Native. Lacustral. Rivers, abundant in shallow places in all our larger 



streams. P. July-September. 

 First record, and probably the first description of the species, Cicutaria 

 palustris tenuifolia, C. B. P. In rivulis et aquis caenosis, qualibus 

 gaudet Sium de quo supra egimus, frequens nascitur haec Cicufa. 

 Folia tenuia pluriftiriam divisa aquis innatant, et non semper 

 caulescere planta observatur. Caulis pollicaris et brachialis 

 crassitudinis. geniculatus supra aquam ad cubitalem et bicubitalem 

 altitudinem se erigit ; ad nodos folia Cicutae, jam ante explicatarum 

 foliis breviora, alternatim nascuntur, glabra et viridia {Bobart), 

 Morison, Hist. Ox. iii. 291, 1699. Oe. fluviatilis, abundant in Thames 

 and tributaries, Mr. H. Boswell, in Phijt. iv. n. s. 100, i860. 

 [The specimen of submerged leaves labelled Oe. fluviatilis in Herb. 



