RUM EX 
Hi 
(b) R. obtusifolius var. microcarpus Dierbach Syst. Uebers. 82 (1826); Doll Rhein. FL 304 (1843); E- 
acutns L. partim excl. syn. ; Lapathum silvestre Lamarck FL France iii, 4 (1778); Rumex sylvestris Wallroth 
Sched. Crit. 161 (1822); R. obttisifolius var. silvestris Fries FI. Snec. 98 (1828); Trimen in Journ. Bot. xi, 131 
(1873)!; Rouy FI. France xii, 77 (1910); R. obtusifolius race silvestris Ascherson und Graebner Syn. iv, 712 
(1912). 
leones: — FI. Dan. t. 1335, as R. obtusifolius ; Trimen in fourn. Bot. xi, t. 13 1, as R. sylvestris ; Beck in 
Reichenbach Icon, xxiv, t. 180, as R. obtusifolius var. sylvestris. 
Camb. Brit. FI. ii. Plate 14.5. (a — d). 
Exsiccata : — Fries, v, 54, as R. obtusifolius ; x, 56, as R. obtusifolius ; Reichenbach, 18, as R. sylvestris. 
Stem less stout and less hairy than in var. 7 nicrocarpus. Laminae usually more acute. Inflorescence 
with branches spreading at wider angles. Fruiting segments smaller (3 — 4 mm. long), less reticulated, 
much less toothed or even subentire. Achenes rather smaller (about 2 mm. long). 
Trimen ( loc . cit .) carefully studied the two varieties of this species, and decided that they were not sharply marked off 
from each other. Cf. also Warren in Bot. Exch. Club Brit. Rep. for 1872 — y, p. 35. 
Not often recorded as a British plant ; Middlesex, Hertfordshire, Cambridgeshire, Huntingdonshire, Stirling- 
shire, Clackmannanshire. 
Apparently common in the north-west of Europe ; rare or little noticed elsewhere, as in France (Rouy FI. 
France xii, p. 77). 
Damp waste places, road-sides, arable land. Very common, and recorded for every county in 
the British Islands ; ascending to over 500 m. in Perthshire. 
Europe ; Asia, from Syria to northern Beluchistan, Afghanistan, northern Persia, and Siberia ; 
northern Africa; North and South America (naturalised). Ascends to 2000m. in central Europe. 
R. condy lodes x obtusifolius (p. 147). 
R. crispus x obtusifolius G. F. W. Meyer FI. Hanov. 469 (1828); Uechtritz in Fiek FI. Schles. 380 
(1881); Haussknecht in Mitt. Geogr. Ges. ( Thiiring .) fena iii, 75 (1885); Murbeck in Bot. Notiser 23 (1899); 
Ascherson und Graebner Syn. iv, 742 (1912); R. acutus L. Sp. PI. 335 (1753)?, excl. syn., non L. herb.; Rouy 
FI. France xii, 7 3 (1910); R. cristatus Wallroth Sched. Crit. 163 (1822) non DC.; Fries FI. Suec. ed. 2, 100 
(1828); R. pratensis Mertens und Koch Deutschl. FI. ii, 609 (1826); Borrer in Eng. Bot. Suppl. no. 2757 (1832)!; 
Syme Eng. Bot. viii, 47 (1868). 
leones : — Borrer in Eng. Bot. Suppl. t. 2757 Beck in Reichenbach Icon, xxiv, t. 175. 
Exsiccata : — Fries, ix, 58 et 58* as R. acutus. 
Numerous forms occur, connecting the two species. Stem 1 m. or rather more in height ; 
branches ascending. Laminae of the ground-leaves broadly oblong to oblong-acute, subcordate 
or truncate at the base, more or less undulate. Pedicel jointed much below the middle, about 
twice as long as the fruiting segments. Flowers from mid-June to October. Fruiting segments 
about 5 or 6 mm. long, ovate, subcordate, more or less dentate with acuminate teeth, strongly 
reticulate, usually all tubercled, tubercle usually larger than the other two. Achene 2^5 mm. long, 
acute, sometimes sterile. 
Common ; Cornwall and Kent to Orkney ; doubtless as common in Ireland, but recorded only from counties 
Kerry, Westmeath, Mayo, and Down. 
Norway; Sweden; Denmark; France; Germany; Spain; Italy; Balkan peninsula; Russia; Caucasus; 
North America; and doubtless wherever R. crispus and R. obtusifolius occur together. 
[ 7 ?. elongatus x obtusifolius (p. 139);] R. glomeratus x obtusifolius (p. 144); R. limosus x obtusi- 
folius (p. 148); R. longifolius x obtusifolius (p. 137). 
R. obtusifolius X pulcher Borbas in Magyar. Bot. Lapok. iii, 49 (1904); Trimen in fourn. Bot. xvii, 
251 (1879) nomen; Ascherson und Graebner Syn. iv, 759 (1912); R. oguliensis Borbas loc. cit. 
Laminae broader and larger than in R. pulcher. Inflorescence with branches more divaricate 
than in R. obtusifolius. Fruiting segments with 1 well-developed tubercle, reticulate as in 
R. pulcher. 
Very rare; Cornwall (specimen in Herb. Mus. Brit, by Rev. A. Ley: see also fourn. Bot. 346 (1875); 
Bot. Exch. Club Brit. Report for 1877 , p. 18); Cambridgeshire. 
Croatia (Borbas, loc. cit.). 
