|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
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)
Leaf: leaflets < 18 mm, < 8.5 mm wide, obliquely lanceolate to curved; awn between leaflets < 2 mm, ± deciduous. Flower: < 2.5 cm wide; sepals ovoid, appressed-hairy; petal claw ± brown; stamens > appendages; ovary hairs dense, straight, stiff, silvery (red-brown in fruit); style 4–6 mm, persistent on young fruit. Fruit: 4.5 mm wide (except hairs), hairs ± 2–4 mm, dense, spreading.
Common. Desert scrub; < 1000 m. East of Sierra Nevada, Desert, (uncommon Tehachapi Mountain Area, San Joaquin Valley, South Coast, San Jacinto Mountains); to southwestern Utah, Texas, central Mexico. Closely related to southern South America Larrea divaricata. Clones may live > 11000 years, longest among extant plants; resinous odor characteristic; dominant shrub over vast areas of desert. Apr–May [Online Interchange]
Previous taxon: Larrea
Next taxon: Tribulus
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=30255, accessed on Dec 21 2014
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
See CalPhotos for additional images
© 2006 Dr. Amadej Trnkoczy
|Geographic subdivisions indicated for the distribution of Larrea tridentata|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month