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The offices of LASN are lined by some 30 tall evergreens. Most people who park in the lot tend to park their cars in the spaces not directly under a tree, as dense, heavy pinecones falling from 80 feet up can dent a car?EUR??,,????'?????<????????????EUR??,,??s roof or hood and set off the car alarm.
The other hazard of parking in the lot is that when spring comes and the wind blows, the cars are coated with a fine yellow blanket of pollen.
Pollen, of course, is a good thing in nature, but not such a good thing for people whose noses are sensitive to pollen spoors.
One city has tried to regulate Mother Nature?EUR??,,????'?????<????????????EUR??,,??s tree pollen. That would be Albuquerque, N.M, which back in 1994 adopted a tree policy that prohibited certain tree species in the landscape to ease the pollen ?EUR??,,????'?????<????????problem?EUR??,,????'?????<???????? http://legistar.cabq.gov:81/Attachments/1698.doc.
The prohibited species are:
Juniperus?EUR??,,????'?????<????????????EUR??,,????'?????<????????Juniper?EUR??,,????'?????<????????
Morus?EUR??,,????'?????<????????????EUR??,,????'?????<????????Mulberry?EUR??,,????'?????<???????? (all)
Ulmus pumila?EUR??,,????'?????<????????????EUR??,,????'?????<????????Siberian Elm?EUR??,,????'?????<????????
Populus?EUR??,,????'?????<???????????Cottonwoods and poplars, all species, varieties or cultivars of the genus excepting P. fremontii var. ?EUR??,,????'?????<????????Rio Grande?EUR??,,????'?????<????????????EUR??,,?? cottonwood, P. tremuloides ?EUR??,,????'?????<????????Quaking Aspen?EUR??,,????'?????<????????????EUR??,,?? and P. acuminata ?EUR??,,????'?????<????????Lance leaf?EUR??,,????'?????<????????????EUR??,,?? or ?EUR??,,????'?????<????????Mountain Cottonwood.?EUR??,,????'?????<????????????EUR??,,???EUR??,,????'?????<????????????EUR??,,?? Those exceptions must be labeled as ?EUR??,,????'?????<????????high pollen/high allergen potential.?EUR??,,????'?????<????????
These genera of wind-pollinated trees may also be sold and planted in the city, provided they too are labeled as ?EUR??,,????'?????<????????high pollen/high allergen potential.?EUR??,,????'?????<????????
Platanus?EUR??,,????'?????<????????????EUR??,,????'?????<????????sycamore?EUR??,,????'?????<????????????EUR??,,???EUR??,,????'?????<???????????London plane tree
Fraxinus?EUR??,,????'?????<???????????ash
Ulmus?EUR??,,????'?????<???????????elm
Cedar and elm trees were originally banned under the ordinance, but an amendment to the ordinance noted: ?EUR??,,????'?????<?????????EUR??,,????'?????<?????????????(R)?restricting the number of trees allowed for landscaping has caused an over dominance of certain species, thus increasing the probability that the tree cover will succumb to a large infestation of damaging insects or disease or disease. Indications of such occurring are already present in some parts of the city among green ash trees.?EUR??,,????'?????<????????
The amended ordinance also removed all species of cypress trees from the prohibited list, but those must also be labeled as ?EUR??,,????'?????<????????high pollen/high allergen potential?EUR??,,????'?????<???????? and planted a minimum of 25 feet from a built structure.
How has that pollen control policy worked out? According to the Albuquerque Air Quality Division, the two pollen-monitoring stations in the city show no evidence of pollen abatement since the ordinance went into effect. Many of the cottonwoods and other heavy pollen-generating tree species that were in the landscape before the ordinance was in place are of course still standing, which may explain the lack of the desired results.
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
November 12th, 2025
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