Salix cinerea (Gray willow)

3/28/2012 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 3 × 4½″ (7.9 × 11 cm)

5/4/2017 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 5 × 3½″ (13 × 9.2 cm)

3/28/2012 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 3½ × 5″ (9.2 × 13 cm)

5/4/2017 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 6 × 4″ (14 × 10 cm)

5/4/2017 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 6 × 4″ (15 × 10 cm)

4/15/2012 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 6 × 4″ (15 × 10 cm)

3/28/2012 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 6 × 4½″ (16 × 12 cm)

4/15/2012 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 4 × 6″ (10 × 14 cm)

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Rosidae	Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
Order	Malpighiales	A broad group encompassing 16,000 species
Family	Salicaceae	Willow family
Genus	Salix	Latin for “willow,” meaning “to leap or spring,” a reference to its fast growth
Species	cinerea	Ashy-gray, usually the foliage