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Crataegus
A revision of genus Crataegus has long been a desideratum with
botanists. The present year has added numerous new species, most of
which must be regarded as provisional until sufficient time has elapsed
to note more carefully the limits of variation in previously existing
species and to eliminate possible hybrids. During the present period of
uncertainty it seems best to exclude most of the new species from the
manuals until their status has been satisfactorily established by
raising plants from the seed, or by prolonged observation over wide
areas.
=Crataegus Crus-Galli, L.=
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