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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] shrub, tree, generally erect, often thorny. Leaf: simple, generally alternate, often clustered on short-shoots; stipules generally present, occasionally modified into spines; generally petioled; blade pinnate-veined or 1–5-ribbed from base. Inflorescence: cyme, panicle, umbel, or flowers 1 or clustered in axils or on short-shoots. Flower: generally bisexual, radial; hypanthium subtending, surrounding, or partly fused to ovary; sepals 4–5; petals 0, 4–5, generally clawed; stamens 0, 4–5, alternate sepals, attached to hypanthium top, each generally fitting into a petal concavity; disk (0 or) between stamens, ovary, thin to fleshy, entire or lobed, free from ovary, adherent or fused to hypanthium; ovary superior or ± inferior, chambers 2–4, 1–2-ovuled, style 1, stigma entire or 2–3-lobed. Fruit: capsule, drupe.
50–52 genera, 950 species: especially tropics, subtropics some cultivated (Ceanothus; Frangula; Rhamnus; Ziziphus). [Richardson et al. 2000 Amer J Bot 87:1309–1324] —Scientific Editors: Steve Boyd, Thomas J. Rosatti.
Unabridged references: [Brizicky 1965 J Arnold Arbor 45:439–463; Richardson et al. 2000 Kew Bull 55:311–341]
Key to Rhamnaceae
Shrub, small tree. Stem: branches alternate, flexible; winter bud scales 0. Leaf: scattered along branches or clustered on short-shoots, deciduous or not; stipules generally deciduous; petioled; blade veins prominent or not. Inflorescence: umbel or flowers 1 in axils. Flower: bisexual; hypanthium 1–3 mm wide, cup-shaped; sepals 5, erect, fleshy, keeled adaxially; petals 5, short-clawed; stamens 5; disk thin, adherent to hypanthium; ovary ± inferior, chambers 2–3, 1–2-ovuled, stigma 2–3-lobed. Fruit: drupe, 2–3-stoned.Key to Frangula
50 species: temperate, w. Med, Eurasia. (Frangible: capable of being broken) [Sawyer & Edwards 2007 Madroño 54:172–174] Often a subg. of Rhamnus; some of value in food, medicine.
Unabridged references: [Bolmgren & Oxelman 2004 Taxon 53:383–390; Wolf 1938 Rancho Santa Ana Bot Gard Monogr 1.]
Previous taxon: Condalia globosa var. pubescens
Next taxon: Frangula californica
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 22 2014
Citation for this treatment: [Author of taxon treatment] 2013. Frangula, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=8837, accessed on Sep 22 2014
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