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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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 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]
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.Key to Cornus
± 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.
Shrub, small tree, 1.5–6 m, generally ± glabrous, generally forming clonal thickets. Stem: slender, brown- to red-purple. Leaf: blade generally 2–5 cm, lanceolate to elliptic, gray-green or abaxially paler, veins 3–4 pairs; petiole 3–8 mm. Inflorescence: cyme, 2.5–4.5 cm wide; pedicels 2–3 mm; bracts 0. Flower: sepals generally < 1 mm; petals 4.5–5 mm, dull white; styles 3.5 mm, ± hairy. Fruit: 8–9 mm, white to ± blue; stone 5–6 mm wide, ± smooth.
Generally moist places; < 1550 m. California Floristic Province (uncommon s California); Oregon. May–Jun [Online Interchange]
Previous taxon: Cornus canadensis
Next taxon: Cornus nuttallii
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 8 2014
Citation for this treatment: [Author of taxon treatment] 2012. Cornus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=20396, accessed on Mar 8 2014
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J. E.(Jed) and Bonnie McClellan © 2006 California Academy of Sciences
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