Crataegus tomentosa var. pyrifolia A.Gray Manual , ed. 2: 124 (1856)

Nomenclatural References

• literature : Manual (Gray), ed. 2. 124. 1856 BHL link from IPNI metadata.
• person : Asa Gray (1810-1888) Based on occurrence of standard abbreviation 'A.Gray' in the authors string.
• database : IPNI record: 69098-2