Phytogeographical Excursion in the British Isles. 327 
spinous condition than in wet years, but the characters of this plant 
appeared to be to some degree independent of these factors. 
Cultural experiments are however much to be desired, to see if the 
features of the variety are constant. 
1638. Hieracium umbellatum L. var. dunale G. Meyer. 
Chlor. Hannov. 421, 1836; var. armeriifolium G. Meyer in Hann. 
Mag. 170, 1824=//. dunense Reymer in v. Hall. FI. Belg. i., 556. 
Southport Dunes 59, named by Professor Graebner and assented 
to by Dr. Ostenfeld. Rouy & Foucaud ( Flore France ix., 401) say 
this plant is identical with H. littoreum Lindberg, not Arvet-Touvet, 
which is the var. littorale from the Jersey dunes. 
1693. Calluna vulgaris Hull var. Erikae Aschers. & Graebn., 
FI. Nord, Flachs. 547. 1898-99, where it is defined “ B. breit, flach, 
beiderseits rinnig.” Its procumbent form makes it a desirable plant 
for the rock garden. Dr. Church in his excellent Floral Mechanisms, 
p. 147, describes and figures the inflorescence of this variety, which he 
found at Cape Cornwall, and shows that visiting insects crawl under¬ 
neath the plant, between the flowers, which are turned downwards, 
and the ground. Although more frequent in exposed and wind¬ 
swept places it is by no means confined to them as it often grows 
with the typical plant. 
1695. Erica Tetralix x vagans=E. Williamsii Druce in Gard. 
Chron., December 2nd, 191 \—E. cinerea x vagans Davey in Journ. 
Bot. 333, 1910=E. vagans x tetralix Turrill in Kew Bull., 378, 1911, 
see preceding page. 
1912. Veronica Anagallis-aquatica L. em. Asch. & Graebn. FI. 
Nord. Flach. 635. 1898-99, diagnosed as “ St. aufrecht od. aus 
liegendem Grunde aufrecht, einfach od. astig, fast4kantig; B. lang- 
lich-lanzettlich bis lanzettlich, sitzend, halbst. umfassend, ent- 
fernt-kleingesagt; Trauben vielbth, etwas locker, zerstreut 
driisenha.; Bth.-stiele langer als das Tragb. u der K. in der F. 
abstehend; Bl.-kr. blaulichweiss, mit dunkleren Adern ; Kapsel 
rundlich. 
1912 bis. V. aquatica Bernh. This is the common plant of 
Great Britain and Ireland and is defined by the foregoing authors 
as :—B. oft rothlich uberlaufen (Scholz); Bth. kleiner ; Bl. kr. 
weisslich-rosa ; F.-stiele derber, ziemlich starr, wagerecht abste¬ 
hend, daher der F. stand sehr locker; Kapselelliptisch.” The 
Index Kewensis gives V. aquatica Benquerel in Neuch Bull. V. 449, 
1859-61. 
2429. yuncus effusus L. var. compactus Lejeune & Courtois, p. 
FI. Belg. ii., 23, p. 131. This form, which is often mistaker for j. 
couglomeratus, differs from the type of J. effusus by the inflorescence, 
even at maturity being condensed into a globular head, with the 
internodes very reduced ; but intermediate stages occur. 
2442 (2). Juncus ranarius Nees in Linnaea XX., 243, 140 
(teste hid. Kew.) emend Song & Perrier in Billot Annot. FI. Fr. et. 
Allem. 192, 1859. This plant, which in Britain has either been 
confused with or called var. fasciculatus of Juncus hufonius, is stated 
by Professor Graebner to be a good species, a view also held by 
Buchenau, the monographer of the genus. Ascherson & Graebner 
(FI. Nord. Flach, 175, 1898-9), thus describe it“ H. 5-23 cm. Bth. 
haufig zu 2-3 genahert; innere P-b. etwas kiirzer, aussere so lang 
od etwas langer als die am Grunde deutlich schmalere Kapsel ; I 
have it also from the Lizard, Cornwall 1 ; Braunton Burrows, Devon 
