OregonFlora: Quercus coccinea vs. Quercus sadleriana

	Quercus coccinea	Quercus sadleriana
		deer oak
Habit		Shrubs deciduous, 1–2 m, colonial; bark usually smooth, pale to medium gray; twigs glabrous or with few, scattered hairs.
Buds		broadly ovoid, gray-pubescent; tips rounded; terminal buds 5–7 mm.
Leaves		elliptic to obovate, 7.3–13.2 × 3.9–6.7 cm, bases rounded or obtuse; margins toothed, not lobed; teeth acuminate or rounded and mucronate; secondary veins usually 9–15 on each side; tips obtuse; surfaces abaxially glaucous, with small, appressed, stellate hairs when young, becoming glabrescent, adaxially glabrous; petioles 12–16 mm.
Fruits		ripening 1st year; nuts ovoid, 13–22 × 7–13 mm; tips rounded; cups cup-shaped or conical; thin, 6–13 × 14–22 mm, covering ~½ of nuts; scales appressed, attachment scars 4–5 mm wide.

	Quercus coccinea	Quercus sadleriana
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Rocky openings in conifer forests, ridges, slopes. Flowering Apr–Jun. 1000–2000 m. CR, Sisk. CA. Native. This species is endemic to the Klamath region of southwestern Oregon and adjacent California. It is known to hybridize with Q. garryana var. breweri at a few sites where the two oaks grow together. Leaves of the hybrids are lobed for 20–30% of their width, with 6–7 shallow obtuse lobes on each side.
Source		Flora of Oregon, volume 2, page 751 Alan Whittemore
Sibling taxa	Q. chrysolepis, Q. garryana, Q. kelloggii, Q. palustris, Q. robur, Q. rubra, Q. sadleriana, Q. vacciniifolia	Q. chrysolepis, Q. garryana, Q. kelloggii, Q. palustris, Q. robur, Q. rubra, Q. vacciniifolia
Web links	Local Web sites: 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	Local floras: CA, OR 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

Quercus coccinea

Quercus sadleriana

deer oak

Habit

Shrubs deciduous, 1–2 m, colonial; bark usually smooth, pale to medium gray; twigs glabrous or with few, scattered hairs.

Buds

broadly ovoid, gray-pubescent;

tips rounded; terminal buds 5–7 mm.

Leaves

elliptic to obovate, 7.3–13.2 × 3.9–6.7 cm, bases rounded or obtuse;

margins toothed, not lobed;

teeth acuminate or rounded and mucronate;

secondary veins usually 9–15 on each side;

tips obtuse;

surfaces abaxially glaucous, with small, appressed, stellate hairs when young, becoming glabrescent, adaxially glabrous;

petioles 12–16 mm.

Fruits

ripening 1st year; nuts ovoid, 13–22 × 7–13 mm;

tips rounded; cups cup-shaped or conical; thin, 6–13 × 14–22 mm, covering ~½ of nuts;

scales appressed, attachment scars 4–5 mm wide.

Quercus coccinea

Quercus sadleriana

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Rocky openings in conifer forests, ridges, slopes. Flowering Apr–Jun. 1000–2000 m. CR, Sisk. CA. Native.

This species is endemic to the Klamath region of southwestern Oregon and adjacent California. It is known to hybridize with Q. garryana var. breweri at a few sites where the two oaks grow together. Leaves of the hybrids are lobed for 20–30% of their width, with 6–7 shallow obtuse lobes on each side.

Source

Flora of Oregon, volume 2, page 751
Alan Whittemore

Sibling taxa