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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


=Crataegus Crus-Galli, L.=

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