|University of California, Berkeley|
Key to families | Table of families and genera
1. Stipules 0.4–1.2 mm; leaves opposite; sepals 1–1.5 mm, obscurely keeled, awn ± 0.1 mm ..... P. depressum
1' Stipules 1.8–2.8 mm; leaves opposite, often appearing to be in whorls of 4; sepals 1.5–2.5 mm, prominently keeled, awn 0.3–0.7 mm ..... P. tetraphyllum var. tetraphyllum
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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