482 IXIACEAE 



Native. Sylvestral. Woods, thickets, usually on chalk or limestone 



soil. Local and rare, P. May-July. 

 First record. Bagley Wood, Mr. Baxter in Walker's Flora, 1833. 



1. Isis. Reported near Cumnor, Boswell. In a copse near Stratten- 



borough Castle. 



2. Ock. Bagley Wood, Baxter, I. c. ! Denchworth. Wait. Near 



Kingston Lisle. 



3. Pang. Streatley, Pamplin. [Probably in Oxfordshire.] Plentiful 



in a coppice near Hawpit Farm. Moulsford. Tilehurst. 



4. Kennet. Hampstead Marshall, near the Kennet Canal. 



5. Loddon. New Lock, abundantly, Mill [? Bucks'. Bisham Wood. 



Britten. Park Place, Rose Hill, Stanton. 

 Iris foetidissima is found in all the bordering counties. 



This is another case in which a tabular arrangement would show the 

 plant equally distributed Avith the Yellow Iris, but the number of individuals 

 of the one would be vastly outnumbered by the other. 



I. Pseudacorus, Linn. Sp. PI. 38 (1753'. Yellow Flag. 



Pseudacorus, Bock. I. vulgaris, Gerard, 46. 



Top. Bot. 397. Syme, E. B. ix. 145, 1. 1495. Nyma,n, 702. Fl. Oxf. 300. 

 Native. Paludal. By rivers, brooks, streams, and marshy places. 



Common and widely distributed. P. May-July. 

 First record. Very common in muddy ditches, grows in Hagbourn 

 Moor, in Church Moor at Blewburj^, and in all the ditches that 

 have much mud in the Vale of Berks, Mr. J. Lousley in Russell's Cat. 

 1839. Wash Water and Bagnor Marsh, Dr. J. Bunmj. 



In Berkshire, I. Pseudacorus is foimd under two modifications — the 

 true I. Pseudacorus of Boreau, Fl. du Centi-e Fr. ed. 3, ii. 635, described 

 as var. genuinus in Syme, 1. c, is the rarer form in the Thames Valley 

 and probably in Berkshire, but I have seen it in Wytham Wood, 

 at Cothill, at Benham, near Sandhurst and in Windsor Park. 



The second is the common plant of the Thames Valley, and is the 

 var. ACORiFORMis, Syme, I.e. Iris acoriformis, Boreau, I.e., which is 

 abundant in all the districts. Dr. J. T. Boswell Syme says it is 

 common by the Thames from Streatley downwards. See Eep. of Bot. 

 Exch. Club, 1867. 



The Iris, which is figured on p. 163 of Our River, by Mr. G. D. Leslie, 

 occurs abundantly in all the bordering counties. 



**I. GERMANicA, Linn. Sp. PI. 38 (1753), not of Sibthorp. 



Alien. Occurs as a reUc of cultivation by the railway near Twyford. 



**SisYRiNCHiUM ANGUSTiFOLiuM, Miller, Gard. Diet. ed. 8 (1768). Syme, E. B. 



ix. 138, t. 1491. 

 S. Bermiidiana, Linn. Sp. PI. 954, p. m. p. 

 Alien. Found in Wellington College ground^ by Mr. -E. Willett, 1874. It 



was not known in the gardens there. 



