Celtis occidentalis
Celtis reticulata
netleaf hackberry
triangular-ovate, 30–74 × 18–44 mm, abaxially light green, adaxially dull dark green; thick; rigid, bases truncate or weakly cordate, rarely broadly rounded;
margins serrate;
teeth (1)7–32 on each side;
veins and veinlets deeply impressed above, strongly projecting abaxially;
tips acute or weakly acuminate;
surfaces with loosely appressed stiff hairs on veins, often with axillary tufts near leaf base, juvenile leaves ovate or elliptic, bright green; thin, with short; blunt tips, leaves of vigorous leaders to 120 mm, toothed, strongly acuminate;
petioles 3–9 mm.
pedicels 6–10(18) mm; crisp-hispid especially near base.
subglobose, 7–8 mm in diameter; purplish brown.
Celtis occidentalis
Celtis reticulata
Rocky slopes and banks, sandy or rocky terraces, often near streams and rivers, or in arid areas. Flowering Mar–Jun. 50–900 m. BW, Col, Lava, Owy. CA, ID, NV, WA; east to WY, southeast to KS and LA. Native.
Celtis reticulata is triploid and apomictic; very little viable pollen is produced, and seed is generally produced without sexual recombination. The form of the shrub is variable in different situations. Shrubs that are growing vigorously often produce arching leaders with very large leaves, while shrubs that are maintaining their size usually remain compact, with only smaller leaves. Leaves on different parts of the plant may be of very different size, shape, and serration. The main description above applies to leaves that are subtending a pedicel, which are consistent in size and form. Hackberries, however, often do not flower every year, and leaves from non-flowering stem segments vary greatly in size and shape.
Alan Whittemore
- Local floras:
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
