Easily mistaken for its limestone counterparts : the northern
Northern Bedstraw (Galium boreale) and the two southern counterparts Limestone Bedstraw (Galium sterneri) and the rarer
Slender Bedstraw (Galium pumilum). Distinction between them hangs on such subtle peculiarities as the presence or absence of minute prickles on the edges of the whorls of leaves, and whether they are forward or backwardly directed, the creaminess or whiteness of the flowers, the number of veins on the leaves, their thinness and shape, and the exact shape of the fruits (when present!).
Many similarities to : Cleavers (Galium aparine) but that has short downward-pointing prickles on each of the four ribs of the stems, which makes it stick to clothing and sheep or other furry animals (whereas Heath Bedstraw has completely hairless stems (and mostly hairy leaves, although there are still some on the leaves). However, the leaves of Heath Bedstraw at 5-11mm are much shorter than those of Cleavers at 10-60mm long.
Some similarities to : Marsh Bedstraw (Galium palustre) and its two sub-species,
Fen Bedstraw (Galium uliginosum),
Wall Bedstraw (Galium parisiene) and to (Galium album) and its two sub-species.
Identification of Bedstraws is never easy.
No relation to :
Heath Cudweed, Heath Pearlwort,
Heath Milkwort, Heath Speedwell,
Darley Dale Heath, Prickly Heath,
Dorset Heath, Sea Heath,
Blue Heath, etc etc [plants with similar names belonging to differing families].