Flora of North America species comparison

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Populus deltoides subsp. wislizeni
Photo is of parent taxon

Rio Grande cottonwood, álamillo
Habit Plants to 35 m, usually less than 20 m. Winter buds pubescent, hairs relatively short, stiff.
Leaves

blade base with 0 basilaminar glands, apex short-acuminate, abaxial surface glabrous at emergence; preformed blade with (3–)5–10 teeth on each side; neoformed blade lengths usually less than widths.
Pedicels

lengths uniform, (5–)8–12(–15 in fruit) mm.
Capsules

with thick, stiff valves.

Populus deltoides subsp. wislizeni
Phenology Flowering Mar–May; fruiting May–Jul.
Habitat Floodplains, permanent streams, near springs, usually in moist soil, often planted near ranches, irrigation ditches, in towns
Elevation 1000-2300 m (3300-7500 ft)
Distribution
from FNA
AZ; CO; NM; TX; UT; WY; Mexico (Chihuahua)
[BONAP county map]
Discussion

Subspecies wislizeni is the common cottonwood of the Rio Grande and Colorado Plateau regions, where it forms relatively small, scattered groves. It is a fairly homogeneous and distinctive southwestern part of the species. It intergrades with subsp. monilifera on the eastern and northern margins of its range. Populus sargentii Dode var. texana Correll is based upon such intergrades.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 19.
Parent taxa Salicaceae > Populus > Populus deltoides
Sibling taxa
P. deltoides subsp. deltoides, P. deltoides subsp. monilifera
Synonyms P. fremontii var. wislizeni, P. wislizeni
Name authority (S. Watson) Eckenwalder: J. Arnold Arbor. 58: 205. (1977)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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