166 
Barbarea praecox R. Br. Ashton Avenue, Bedminster, N. 
Somerset, May 14, 1913. — J. W. White. 
Lepidium ruderale L. Denizen or alien on waste ground by 
Rownham Ferry, R. Avon, N. Somerset, Oct. 8, 1921. Mr. 
White describes this as local and persistent about the docks and 
quays near Bristol. — H. S. Thompson. I agree. Nice examples 
in good fruit. — C.E.S. 
Thlaspi alpestre Linn. Wall top, near Llanrwst, Carnarvon, 
v.c. 49.— Coll. Jos. Sidebotham, May 1867. Comm. S. H. 
Bickham. This plant has been placed under var. occitanicum 
(T. occitanicum Jord.) and is very similar to the N. Somerset 
form, although the notch of its capsules seems less developed. 
This variety is very close to the Matlock T. virens Jord., which 
hardly differs except in its nearly truncate capsules. Both of 
these forms are readily distinguishable from the T. alpestre of 
Teesdale, which is a more robust plant with obcordate instead of 
obcuneate capsules showing a well-marked notch scarcely exceeded 
by the style. In all of these plants the form of the capsules is 
not well seen until they are fully developed. — H. W. Pugsley. 
Immature plants from near Llanrwst sent to the Club b}'' Mr. 
Comber (Report for 1911—15, p. 484) Mr. White preferred to 
leave with T. sylvestre Jord. as defined in the “Manual.” Mr. 
Griffith’s from the Denbigh side of Llanrwst (1919) Mr. Salmon 
believed came under T. sylvestre Jord. In “Top. Bot.” the 
seggregate ‘ occitanum’ is given from v.c. 49 and 50. In White’s 
“Flora of Bristol,” p. 158, is a useful note on T. alpestre, 
incidentally pointing out that Jordan’s name was occitanicum , not 
occitanum as written in English books. This note, based upon 
careful comparison by White and Bucknall of Somerset material 
with Jordan’s works, ends : “Not one of Jordan’s seggregates, in 
fact, accords with our own form, which, therefore, had perhaps 
better be left under the aggregate T. alpestre .” It is obvious that 
Syme (“ Eng. Bot.” Ed. 3) did not understand Jordan’s seggre- 
gates, though Syme gave detailed notes and figures. Under 
T. virens he refers to and illustrates the long petioled root-leaves. 
It happens that all my numerous specimens from the Mendip 
area (1850 — 1922) have the “foliis radicalibus obovatis” of 
Jordan’s occitanicum, \mt the leaves are not often ‘glaucous,’ nor 
are the spoon-shaped root-leaves “ saepius grosse crenato-dentatis,” 
though many are slightly crenate-toothecl. The leaves exactly 
resemble those figured by Coste of the Corsican T. brevistylum 
Jord. The root-leaves are similarly obovate and abruptly 
contracted into a narrow petiole, up to an inch long, in my 
