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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Annual, perennial herb, shrub, often armed; caudex present or not. Stem: branched; nodes often angled, swollen. Leaf: 1-compound, opposite, petioled; stipules persistent or not; leaflets entire. Inflorescence: flowers 1–2 in axils. Flower: bisexual; sepals 5, free, persistent or not; petals 5, free, generally spreading, twisted (corolla propeller-like) or not; stamens 10, appendaged on inside base or not; ovary superior, chambers (and lobes) 5–10, each with 1–several ovules, placentas axile. Fruit: capsule or splitting into 5–10 nutlets (= mericarps).
27 genera, ± 250 species: widespread especially in warm, dry regions; some cultivated (Guaiacum, lignum vitae; Tribulus, caltrop). [Sheahan & Chase 2000 Syst Bot 25:371–384] —Scientific Editor: Thomas J. Rosatti.
Key to Zygophyllaceae
Shrub, unarmed. Stem: branched, erect to prostrate, < 4 m, ± red becoming gray; nodes swollen, darker; hairs 0 or appressed. Leaf: stipules persistent; leaflets 2, fused at base. Inflorescence: flowers 1 in axils. Flower: sepals unequal, overlapping, deciduous; petals clawed, twisted, yellow, deciduous; stamen appendages bract-like, coarsely toothed. Fruit: 5-lobed, spheric, short-stalked, hairy, splitting into 5 hairy, 1-seeded nutlets.
5 species: warm, dry America. (J.A. Hernández de Larrea, Spanish bishop, 1730–1803) [Lia et al. 2001 Molec Phylogen Evol 21:309–320]
Unabridged etymology: (Juan Antonio Pérez Hernández de Larrea, Bishop of Valladolid, Spain, 1730–1803)
Previous taxon: Kallstroemia parviflora
Next taxon: Larrea tridentata
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Dec 21 2014
Citation for this treatment: [Author of taxon treatment] 2013. Larrea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=9716, accessed on Dec 21 2014
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