Populus fremontii subsp. fremontii
Illustrated
Synonyms: Populus arizonica Sargent Populus fremontii var. arizonica (Sargent) Jepson Populus fremontii var. macdougalii (Rose) Jepson Populus fremontii var. pubescens Sargent Populus fremontii var. thornberi Sargent Populus fremontii var. toumeyi Sargent Populus macdougalii
Plants to 30 m. Branchlets, leaf-blades, and petioles glabrous or glabrate to densely hairy, hairs whitish. Neoformed leaves: blade broadly-triangular-ovate, usually about as wide as long, rarely wider, base truncate or cordate, apex short-acuminate. Capsules (6–) 7.5–11 mm.
Phenology: Flowering Feb–May; fruiting Mar–Jun.
Habitat: Floodplains, canyons, springs, other moist places
Elevation: (-60-)0-1500 (-2200) m
Distribution
Ariz., Calif., Idaho, Nev., N.Mex., Utah, Mexico (Baja California), Mexico (Baja California Sur), Mexico (Sonora)
Discussion
Subspecies fremontii is the common cottonwood of southwestern North America west of the Continental Divide. It intergrades with subsp. mesetae along a line from southeastern Arizona south along the border between Chihuahua and Sonora.
Selected References
None.
Lower Taxa
None.
... more about "Populus fremontii subsp. fremontii"
at right angle;plane +
truncate +
dehiscent +
short-acuminate +
absent +
furrowed +
pale tan +
long +
wider +
absent +
crenate-serrate +
neoformed +
toothed +
3/5;1/1 +
broadly-triangular-ovate +
white +
not ciliate +
pistillate +
deciduous +
coarse +
round +
slender +
separated +
resinous +
yellowbrown +
flowering +
hairy +
winter +
2-4-valved +
glabrous +
spherical +
(10-)15-25(-35)-flowered +
pendulous +
arillate +
entire +
oblique +
cup-shaped +
absent +
scant +
distinct +
slender +
caducous +
distinct +
subtending +
capsular +
arillate +
whitish +
long +
silky +
Present +
fasciculate +
racemose +
flowering +
year-round +
simple +
marcescent +
deciduous +
neoformed +
translucent +
crenate-serrate +
2-4-carpelled +
1-7[-10]-locular +
axile +
parietal +
spherical +
2;25 +
absent +
absent +
modified +
not glandular +
absent +
3/5;3/4 +
flattened +
fused +
intruded +
Proc. Amer. Acad. Arts +
1875 +
not evident +
layering +
9;15 +
absent +
deep +
Illustrated +
40;60 +
not spinose +
erect;pendent +
glabrescent;pubescent +
truncate +
convoluted +
2;4 +
plate-like +
expanded +
absent +
distinct +
pistillate +
yellowish green +
Populus fremontii subsp. fremontii +
Populus fremontii +
subspecies +
heterophyllous +
37 cm370 mm <br />0.37 m <br /> (?) +