28 CRUCIFERA. [Brassica. 
From sea-level, to 1,000 feet among crops in the upper 
Roughty valley (R.W.S.). 
First record in 1881: Barrington, Proc. R.I.A. 
B. alba Boiss. Sinapis alba Linn. White Mustard. 
Districts [I.] II. III. [IV.] [V.] [VI] VI. VOT. — 
Colonist. Cultivated ground and waste places. Rare and 
chiefly in the north. Ann. June—August. 
[I. Sparingly in the grounds of the Southern Hotel, 
Kenmare, 1913].—II. By the roadside north of West Cove, 
Kenmare Bay, 1907 ; a weed in Darrynane gardens, 1904.— 
III. Sparingly in waste ground about Portmagee and among 
crops near Ballycarbery, Valencia Harbour, 1911.—[IV. A 
weed in Churchtown gardens, Beaufort, 1904.—V. On 
railway ballast near Camp, Tralee Bay, 1894.—VI. A weed 
in Woodlawn and Southhill gardens, 1909]._VII. Frequent 
in crops about Kilfenora, &c., Tralee Bay, and about Barrow 
Harbour, especially on the south side: R.W.S. 1891, and 
in 1914.—VIII. In several localities to the west and north 
of Ardfert and about Banna, 1902 ; in two or three places 
by the roadside east of Abbeydorney, 1907: R.W.S. 
First record in 1891: R.W.S., Journ. of Bot. 
DIPLOTAXIS DC. 
D. muralis DC. Wall Mustard. 
Districts — — IM. — — VI. VII. VII. IX. 
Colonist. On roadsides, railways and walls. Rare. Ann. 
and Peren. May—August. 
III. Sparingly on the railway-track near Cahersiveen and 
near Reenard Point opposite Valencia Island ferry, 1910: 
Miss Delap.—VI. Sparingly on the railway embankment 
near Killarney, 1909.—VII. Sparingly by a wall near Fenit 
pier, 1906: &.W.S. 1908—now abundant in several places 
between Fenit and the Spa, Tralee Bay, especially fine on a 
sea wall near Kilfenora, 1914.—VIII. Sparingly at the foot 
of a roadside wall a little east of Ballyheige : R.W.S. 1903, 
appears to be increasing here, 1907: R.W.S.—IX. On the 
railway at Listowel, 1913: Phillips. 
First record in 1903: R.W.S., Irish Nat. 
This plant appears to be spreading rapidly in the south 
of Ireland, chiefly along the railways. Although first 
noticed in Kerry so recently as 1902, it is already on record 
for five out of the nine county divisions. It has now 
thoroughly established itself along the north side of Tralee 
Bay and has, no doubt, come to stay. 
