Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to 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 |
Next taxon


Ailanthus altissima
TREE OF HEAVEN


Higher Taxonomy
Family: SimaroubaceaeView DescriptionDichotomous Key
Common Name: QUASSIA or SIMAROUBA FAMILY
Habit: Shrub, tree; generally dioecious. Stem: occasionally thorny; bark often bitter. Leaf: generally alternate, simple, entire, or pinnately compound, leaflets subentire to toothed near base. Inflorescence: panicle, raceme, or flowers 1. Flower: unisexual, inconspicuous; sepals generally 4--5, generally fused at base, generally erect; petals generally 5, free, generally spreading; stamens generally 10, generally on disk, filaments often with a basal scale; pistils 1--8, ovaries superior, 1--2-chambered, 1-ovuled [if pistil 1, chambers generally 2--5, 1-ovuled], styles free or partly fused. Fruit: winged achenes or drupes [berry, nut], in clusters [not].
Genera In Family: 22 genera, 100 species: tropics, warm temperate; some cultivated. Note: Bark, leaves used traditionally to treat malaria, other ailments.
eFlora Treatment Author: Robert E. Preston & Elizabeth McClintock
Scientific Editor: Thomas J. Rosatti.
Genus: AilanthusView Description 


Habit: Plant +- dioecious, with a few bisexual flowers. Leaf: generally +- odd-pinnate, ill-smelling when crushed, deciduous. Inflorescence: large panicle, terminal. Flower: calyx lobes 5--6; petals 5--6; stamens 10--12; ovaries very compressed, adherent near middle, styles +- free but twisted together. Fruit: 1--5, +- pendent, seed near middle.
Etymology: (Moluccan: sky tree)
Reference: Corbett & Manchester 2004 Int J Pl Sci 165:671--690
Ailanthus altissima (Mill.) Swingle
NATURALIZED
Habit: Plant < 20 m; young parts +- glandular-puberulent. Leaf: 3--9 dm; leaflets 13--25, 8--13 cm, lanceolate, base generally +- truncate, with 2--4 teeth, each with a large gland abaxially. Inflorescence: 10--20 cm. Flower: sepals < 1 mm, petals 2--3 mm, spreading. Fruit: < 5 cm, linear or oblong.
Ecology: Disturbed areas, grassland, oak woodland, riparian areas; Elevation: < 1860 m. Bioregional Distribution: KR, NCoRO, NCoRI, CaRF, SN, GV, CW, SW (exc ChI), W&I, DMtns; Distribution Outside California: widely naturalized in temps; native to China. Flowering Time: Jun Note: Cultivated as street tree, fast-growing, spreading by seeds, invasive roots. Common near old habitations.
Jepson eFlora Author: Robert E. Preston & Elizabeth McClintock
Reference: Corbett & Manchester 2004 Int J Pl Sci 165:671--690
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Noxious Weed listed on the CDFA Weed Pest Ratings table
View the CDFA Pest Rating page for Ailanthus altissima
Weed listed by Cal-IPC

Previous taxon: Ailanthus
Next taxon: Castela

Name Search

Botanical illustration including Ailanthus altissima

botanical illustration including Ailanthus altissima

Please use this Google Form for Contact/Feedback

Citation for this treatment: Robert E. Preston & Elizabeth McClintock 2012, Ailanthus altissima, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=12354, accessed on April 19, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 19, 2024.

Ailanthus altissima
click for enlargement
©2013 Neal Kramer
Ailanthus altissima
click for enlargement
©2019 Barry Breckling
Ailanthus altissima
click for enlargement
©2009 Neal Kramer
Ailanthus altissima
click for enlargement
©2011 Neal Kramer
Ailanthus altissima
click for enlargement
©2005 George W. Hartwell

More photos of Ailanthus altissima
in CalPhotos



Geographic subdivisions for Ailanthus altissima:
KR, NCoRO, NCoRI, CaRF, SN, GV, CW, SW (exc ChI), W&I, DMtns
MAP CONTROLS
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
map of distribution 1
(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).





 

Data provided by the participants of the  Consortium of California Herbaria.
MAP LEGEND
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS


CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).