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PARNASSIACEAE GRASS-OF-PARNASSUS FAMILY

Peter W. Ball

Perennial herb from caudex or rhizome [annual], generally glabrous, often with ± red marks on leaves, flowers when dry. Stem: scape with generally 1 leaf-like bract [scape 0]. Leaf: simple, basal [cauline], alternate [subopposite], generally petioled, often with ± red marks when dry; veins ± palmate. Inflorescence: 1-flowered [cyme]. Flower: generally bisexual, ± radial; hypanthium minute, free from ovary; calyx lobes generally 5; petals generally 5 [0], free, generally white; stamens generally 5, opposite sepals; staminodes generally 5, alternate stamens, lobes generally present, thread-like to oblong, gland-tipped; pistil 1, ovary superior, chamber ± 1, placentas 4 [3], axile below, parietal above, styles very short, stigmas [3]4. Fruit: [3]4-valved capsule. Seed: many, winged, netted.
2 genera, ± 70 species: northern temperate, low arctic, alpine, temperate South America (Lepuropetalon, Parnassia). [Zhang & Simmons 2006 Syst Bot 31:122–137] Formerly included in Saxifragaceae. —Scientific Editor: Thomas J. Rosatti.

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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 20 2014
Citation for this treatment: [Author of taxon treatment] 2013. Parnassiaceae, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=93789, accessed on Sep 20 2014

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