Polygonaceee. Thymeleaceae. 
337 
and the stem tall with thick nodes, and slenderer spikes 
(v. nodosum Pers.? *);.also b.punctatum Grml. Ls spotted 
underneath as also the perianth with numerous golden 
glands.—Ditches, manure-heaps, village streets; b. Kreuz- 
lingen, Lugano. 7—9 . . lapathifolium L. 1916. 
— Common peduncles without, or with very scattered, glands. 
Sheaths closely applied, with long stiff cilise. Ls not 
spotted underneath.—As the last; everywhere. 7—9 
Persicaria L. 1917. 
12. Perianth with 3 — 4 divisions, covered with numerous 
shining glands. PI. with a sharp peppery flavour. 
Sheaths, especially the upper, shortly ciliate. — Ditches, 
damp wooded places; distrib. 7 . Hydropiper L. 1918. 
— Perianth gen. with 5 divisions, not glandular, or only 
with indistinct glands at the base. PI. with a herby 
flavour. Sheaths long-ciliate ..... 13 
13. Ls oblong-lanceolate, narrowed at both ends (the 
greatest breadth about the middle), veined. Spikes 
drooping.—Ditches, river banks; distrib. 7, 8 
mite Schrank, 1919. 
— Ls narrower than in the last, rounded at the base or 
hardly narrowed, then of equal breadth as far as the 
middle, narrowed insensibly and almostin a stra i gh t 
line from there to the top, indistinctly veined. — Ditches^ 
damp fields; local (wanting in S.). 7 minus Huds. 1920. 
OBS. P. Persicaria and the allied species produce hybrids which are 
difficult to determine and require further examination as regards Switzerland. 
Wilms professes to have found near Geneva: P. lapathifolium-Persicaria, 
Papon near Yilleneuve: P. Hydropiper-Persicaria. P. Hydropiper-mite accord¬ 
ing to Siegfried. P. Bistorta-viviparum Br, near Chur. 
89. Thynxeleacese. 
494. Passerina. Passerina. VIII, 14. 
1. FIs greenish, in long leafy spikes. Ls linear-lanceolate. 
Fields, fallow; not rare (wanting in T.). 7 
annua Wikstr. 1921. 
495. Daphne. Daphne. VIII, 14. 
1. FIs (before the ls) gen. 3 together, sessile in the axils 
of the ls (now fallen) of the past year, rose-coloured, 
rarely white (and then the berries yellow?).—Woods, 
up to 2200m, in rocky places of the Alp.: Jaccard; 
distrib. 3.Mezerium L. 1922. 
*) We do not know another P. nodosum Meissn. Aschers., which 
differs from this in having the common peduncles without, or almost without, 
glands. Can this be P. lapathifolium Heg.? incanum Gaud. ? SeeN.Beitr.III,23. 
