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CORNACEAE DOGWOOD FAMILY

James R. Shevock

Perennial herb to tree; sometimes dioecious. Leaf: generally opposite, simple, generally entire, generally deciduous, veins often arched; stipules 0. Inflorescence: cyme or raceme, generally umbel- or head-like, subtended by showy or ± non-showy bracts or open, not subtended by bracts. Flower: generally small, generally bisexual; calyx generally 4-lobed; petals [0]4[(5)], free; stamens generally as many as, alternate petals; ovary inferior, chambers 1–4, 1-ovuled, style simple, stigma lobes 0[2–4]. Fruit: drupe [berry]. Seed: generally 1–2.
± 12 genera, ± 100 species: especially northern temperate (also southern tropics, subtrop); cultivated as ornamental (Cornus, Aucuba); some timber species. [Kubitzki 2004 in Kubitzki (ed.), The Families and Genera of Vascular Plants. VI:82–90. Springer] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Eyde 1987 Syst Bot 12:505–518]

CORNUS DOGWOOD
Leaf: generally opposite or whorled; base, tip generally tapered. Inflorescence: head-like cyme subtended by showy bracts, open cyme not subtended by bracts, or umbel subtended by non-showy bracts. Fruit: stone 1–2-chambered.
± 50 species: northern temperate, rare southern hemisphere; many cultivated as ornamental, some for fall color; some fruit used for jam, syrup. (Latin: horn, from the hard wood) [Murrell 1993 Syst Bot 18:469–495] Divided by some into 6 or more genera.

Key to Cornus

C. sericea L. AMERICAN DOGWOOD
NATIVE
Shrub generally 1.5–4 m. Stem: branches ± red to purple, ± glabrous to minute-strigose, in age gray-green, generally glabrous. Leaf: blade generally 5–10 cm, lanceolate to ovate or elliptic, paler abaxially, veins 4–7 pairs. Inflorescence: cyme, strigose; bracts 0. Flower: petals 2–4.5 mm; style 1–3 mm. Fruit: 7–9 mm, white to cream; stone smooth or 3-ridged on faces, furrowed on sides. Highly variable complex with many local forms, treated broadly here. Subspecies intergrade widely. [Online Interchange]

C. sericea subsp. occidentalis (Torr. & A. Gray) Fosberg
NATIVE
Leaf: generally dense-rough-hairy abaxially. Flower: petals 3–4.5 mm; style 2.5–3 mm. Fruit: stone generally 3-ridged on faces.
Generally moist places; < 2500 m. California Floristic Province; to Alaska, Montana. May–Jul [Online Interchange]
Unabridged synonyms: [Cornus occidentalis (Torr. & A. Gray) Coville]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 16 2014
Citation for this treatment: [Author of taxon treatment] 2013. Cornus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=49997, accessed on Sep 16 2014

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click for enlargement Cornus sericea subsp. occidentalis
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© 2006 Julie Kierstead Nelson

Geographic subdivisions indicated for the distribution of Cornus sericea subsp. occidentalis Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.