314 FLORA OF OXFORDSHIRE. 
Native. Pascual. Fields and pastures. Common in all the districts. 
P. April, May. 
First record, Sib., Juncus campestris. 
Both forms umbellata and congesta occur. 
Orv. LXXXIV. AROIDEA, Juss. 
ACORUS. L. 
A. Calamus, L. Sweet Flag. 
Top. Bot. 428. Syme, E. B. ix. 11.1391. Nym. 754. Bx. 330. 
Native or denizen. Paludal. Riversides. Local. P. June~Aug. 
First record, Sib. 1794. 
4. Ray. Mesopotamia, it was planted here by Mr. Baxter. 
6. Thame. Dorchester, Stb./ Between Oxford and Iffley, and Iffley 
and Sandford, Bz./ in Purton. Thame River, Bx. Abundant by 
the Thame near Dorchester. 
7. Thames. Banks of the Thames above Reading, Oxford side, F. A. 
Lees. Near Pangbourne, Newb. ! 
Berks. Typha aromatica clava rugosa, nobis circa piscinas et canales 
Honoratissimi et Maecenatis insignis, H. Comitis de Clarendon apud 
Swallowfield in com. Bercher., Morison, iii. 275. Iffley, Sandford. Bucks, 
Marlow. Northants, planted. Warwick, planted. 
ARUM. L. 
A. maculatum, L. Lords and Ladies. Cuckoo-pint. 
Top. Bot. 427. Syme, E. B. ix. 13. 1392. Nym. 755. Bx. 261. 
Native. Sylvestral. Woods, thickets, hedges. Common in all the 
districts, but owing to the trimming of hedgerows less frequent than 
formerly. P. April, May. 
First record, Sib. 1794. 
The form with unspotted leaves is nearly as frequent as the type. 
Orv. LXXXV. LEMNACE, Durt. 
LEMNA. L. 
L. trisulca, LD. Ivy leaved Duckweed. 
Top. Bot. 426. Syme, E. B. ix. 17.1394. Nym. 756. 
Native. Lacustral. Ponds, ditches, stagnant water. Not uncommon. 
A. June. 
First record, Sib. 1794. 
8. Swere. Ditch beyond Mill Meadow. Cherwell near Grimsbury, 
Bees, 
