CHENOPODIUM 163 
Camb. Brit. FI. ii. Plate 165. {a) Flowering shoot, (b) Lower part of stem. ( c ) Lower leaf. ( d ) Flower 
(enlarged). ( e ) Seeds, (f) Seeds (enlarged). Hort., from seed 
brought from Jersey (E. W. H.). 
Exsiccata : — Billot, 3192. 
Annual ; scarcely mealy ; odour disagreeable. Stem 
erect, up to 1 m. high, grooved, more or less branched, 
slender above. Petioles half to two-thirds as long as the 
leaves. Laminae large, thin, cordate-ovate, with a few 
very large teeth, acuminate ; upper ones narrower, be- 
coming subentire. Inflorescence lax ; lower branches pe- 
duncled, wide-spreading, subtended by a small leaf, shorter 
than the leaves, upper ones leafless. Perianth-segments 
broadly keeled. Achenes only partially enclosed by the 
persistent perianth. Seeds large (for this series of species), 
about 1 "4 — 1 ‘6 mm. in diameter, black, coarsely rugose. 
Although named C. hybridum , there is no reason to suppose this 
plant is a hybrid. 
Rich, damp, waste places, manure heaps, cultivated 
land ; from Dorset and Kent to Shropshire and Norfolk ; 
adventitious in Carnarvonshire, Lancashire, near Edin- 
burgh, and near Belfast. 
Southern Scandinavia, Denmark, Germany, France, 
central Europe (to 1400m.), Russia, southern Europe; northern Africa; Asia Minor and central Asia; 
North America. 
Section III. PSEUDOBLITUM 
Pseudoblitum Bentham and Hooker Gen. PI. iii, 52 (1880); Volkens in Engler und Prantl Pflan- 
zenfam. iii, pt. i a, 61 (1893). 
For characters, see page 154. 
British species of Pseudoblitum 
10. C. rubrum (see below). Laminae narrower than in C. botryodes , margin very variable — 
strongly dentate to subentire, green underneath. Inflorescence leafy. 
11. C. botryodes (p. 165). Laminae deltoid, broader than in C. rubrum , margin subentire, 
green underneath. Inflorescence leafless above, branches usually longer than the subtending leaves. 
12. C. glaucum (p. 165). Laminae oblong, margin sinuate, very glaucous-looking under- 
neath. Inflorescence leafy. 
10. CHENOPODIUM RUBRUM. Plates 166, 167, 168 
Blitum pes ayiserinus dictum est auctiore folio Ray Syn. ed. 3, 154 (1724). 
Chenopodium rubrum L. Sp. PI. 218 (1753)!; Smith FI. Brit. 274 (1800); Eng. FI. ii, u (1824); 
Rouy FI. France xii, 48 (1910) excl. var. crassifolium ; C. rubrum subsp. eu-rubrum Syme Eng. Bot. viii, 22 (1868). 
Annual, scarcely mealy, usually with much anthocyanin. Stem erect, decumbent, or prostrate, 
up to 7 dm. high but often much smaller, grooved, usually branched. Petioles rather long. Laminae 
extremely variable in shape and size, subrhomboid to spathulate, margin usually coarsely toothed, 
teeth often rather obtuse, apex usually acute to acuminate. Inflorescences often dense, leafy to 
the apex, often much branched and then with the lower branches about two-thirds as long as 
the subtending leaves. Flowers very small ; July to September. Perianth with 3 — 5 segments, 
often 5 in the terminal flowers and 4 in the others. Filaments slender, a little longer than the 
perianth. Achenes very small. Seeds reddish, shining, small, nearly all vertical, terminal ones 
often horizontal, horizontal ones rather larger than the vertical ones which are about 06 — 07 mm. 
in diameter ; August to October. 
(a) C. rubrum var. blitoides Wallroth Sched. Crit. 507 (1822); Rouy FI. France xii, 49 (1910); C. blitoides 
Lejeune FI. Spa 126 (1 81 1) ? ; Blitum rubrum var. acuminatum Koch Syn. ed. 2, 699 (1844). 
21 — 2 
