
Filigree.
Unidentified grass, Fairbank, Arizona.

Filigree.
Unidentified grass, Fairbank, Arizona.
Typha triptych.
Typha triptych.

Catkins.
Fremont’s cottonwood (Populus fremontii), Sweetwater Wetlands Park, Tucson, Arizona.

Catkins.
Fremont’s cottonwood (Populus fremontii), Sweetwater Wetlands Park, Tucson, Arizona.

Fremont’s cottonwood (Populus fremontii) at Holy Trinity Monastery, St. David, Arizona.
I did a crude measurement with my outstretched arms and estimate that this mighty tree’s trunk is about 36 feet in circumference (11 m) at breast height.

Fremont’s cottonwood (Populus fremontii) at Holy Trinity Monastery, St. David, Arizona.
I did a crude measurement with my outstretched arms and estimate that this mighty tree’s trunk is about 36 feet in circumference (11 m) at breast height.

Going to seed. Fluff to follow.
Developing seed pods on Fremont’s cottonwood (Populus fremontii), at the Sweetwater Wetlands Park, Tucson, Arizona.

Going to seed. Fluff to follow.
Developing seed pods on Fremont’s cottonwood (Populus fremontii), at the Sweetwater Wetlands Park, Tucson, Arizona.

Greening up.
Early spring color on San Pedro River cottonwoods, at Fairbank, Arizona.