Species Brief
Platanus wrightii, Arizona sycamore
Written
July, 2026
Contributors
Ilana L. Abrahamson - 1st Compiler, Leila Duchac - 1st Editor, Taryn R. Brahmsteadt - 2nd Editor
Abrahamson, Ilana L., compiler. 2026. Species Brief: Platanus wrightii, Arizona sycamore. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Missoula Fire Sciences Laboratory (Producer). Available: https://research.fs.usda.gov/feis/species-briefs/plawri
DOI
10.2737/feis-species-brief-plawri
Scientific Name
Platanus wrightii
Common Names
Arizona sycamore
Arizona planetree
buttonwood
Wright's sycamore
FEIS Lifeform Type
Tree
Kingdom
Plantae
Class
Magnoliopsida (Dicot)
Order
Hamamelidales
Family
Platanaceae
Genus
Platanus
Nativity
Native
Invasiveness
Noninvasive
This Species Brief is a concise summary of the biological, ecological, and fire‑related characteristics of an individual species derived from a Fire Effects Information System (FEIS) Species Review. Table 1 is derived from a standardized template and highlights these characteristics.
| Attribute | Characteristic | Justification | Source |
|---|---|---|---|
| Biological characteristics | |||
| Life form | Tree | Arizona sycamore is a large, spreading, deciduous tree that grows up to 25 m tall. | FEIS: Botanical Description [1] |
| Typical lifespan | 100-200 years*; 201+ years* | Information about typical lifespan is not reported. However, at one site overstory Arizona sycamores were 104-154 years old and up to 235 years at another site. | FEIS: Stand or Population Structure [1] |
| Life cycle | Perennial | Arizona sycamore is a long-lived deciduous tree. | FEIS: Botanical Description; Stand or Population Structure [1] |
| Drought tolerance | Low | Arizona sycamore is an obligate riparian species that grows only where there is abundant surface or ground water. Seedlings and saplings usually die if soil moisture levels drop. | FEIS: Site Characteristics; Seedling Establishment [1] |
| Rooting depth | Deep | Arizona sycamore is deep rooted. | FEIS: Botanical Description [1] |
| Bark thickness at maturity | Thin | The bark is thin, with a flaky outer bark that exposes the whitish inner bark. | FEIS: Botanical Description [1] |
| Sheds low branches | Insufficient information | The source does not provide explicit information about shedding of low branches. Trunks are typically single-stemmed but sometimes multiple-stemmed. Its lower branches are thick, and the branches tend to arch upward. | FEIS: Botanical Description [1] |
| Reproduction and Regeneration | |||
| Adventitious buds | Root crown; Root sprouts; Epicormic | Arizona sycamore sprouts from the root crown, trunk, and/or stump after complete or partial top-kill. It also spreads by layering and sprouting from the roots. | FEIS: Vegetative Reproduction and Regeneration [1] |
| Time to reproductive maturity | Insufficient information | The source does not provide explicit information about time to reproductive maturity. | FEIS: [1] |
| Soil seed bank longevity | Transient (<1 year) | Seeds are germinable upon dispersal but lose viability rapidly. In a lab, seed viability dropped to nearly 0% after 28 weeks. | FEIS: Seed Banking; FEIS: Germination [1] |
| Serotinous cones | N/A | This attribute applies to conifers. Arizona sycamore bears fruit clusters (tufted achenes) that disperse over several months, with no fire- or heat-triggered fruit retention. | FEIS: Seed Dispersal [1] |
| Seed dispersal mechanism | Gravity; Wind; Water | Most fruit clusters drop under or near the parent tree. Seeds that break away from fruit clusters that have not dropped from the tree are most likely to be wind dispersed. Water disperses some seeds during floods. | FEIS: Seed Dispersal [1] |
| Seed dispersal distance | Short (mostly under parent plant) | Most fruit clusters drop under or near the parent tree. At one site 90% of seeds dispersed from 10 m upstream to 16 m downstream of parent plants. | FEIS: Seed Dispersal [1] |
| Optimal conditions for seedling establishment | Mineral soil; Sun | Seedlings require a continually moist substrate to establish. Arizona sycamore pioneers on sandbars and gravel bars, and establishment is best on open sites, with saplings more common away from tree canopies. | FEIS: Seedling Establishment; Successional Status [1] |
| Successional Status | |||
| Shade tolerance | Moderately shade tolerant | Arizona sycamore is considered intermediate in shade tolerance. While it is a disturbance-dependent pioneer species, it can establish beneath its own canopy. Establishment is best on open sites, and saplings are more common away from tree canopies. | FEIS: Successional Status [1] |
| Successional status | Early; Mid*; Late* | Arizona sycamore occurs in all stages of succession but is most common in early-seral communities, and is described as a disturbance-dependent pioneer riparian tree species. | FEIS: Successional Status; Summary [1] |
| Fire | |||
| Primary fire response(s) or adaptation(s) | Recover/Resprout | Limited research shows that Arizona sycamore is likely to survive fire as mature trees or as sprouts. After one fire, 43% of Arizona sycamores survived as mature trees, 0% were killed, and 57% sprouted after partial or complete topkill. For twice-burned trees, 21% survived as mature trees, 4% were killed, and 75% sprouted. It may also establish from seed from off- and on-site seed sources, although this was not documented. | FEIS: Immediate Fire Effects; Fire Adaptations and Plant Response to Fire [1] |
| Germination is fire stimulated | Rarely/No | Arizona sycamore seeds are germinable upon dispersal. The source does not describe germination as being stimulated by fire. | FEIS: Germination [1] |
| Flowering/fruiting is fire stimulated | Insufficient information | The source does not provide explicit information about fire-stimulated flowering or fruiting. | FEIS: [1] |
| Season when it is most sensitive to fire | Insufficient information | The source does not provide explicit information about the season when Arizona sycamore is most sensitive to fire. | FEIS: [1] |
| Plant flammability | Insufficient information | Arizona sycamore's flammability was not quantitatively described in the scientific literature. However, its flaky bark and large leaves contribute substantially to the litter layer. | FEIS: Fuel Characteristics [1] |
| Early colonizer/recolonizer of burned or disturbed sites | Frequently | Arizona sycamore is described as a disturbance-dependent pioneer riparian tree species. It often pioneers on sandbars and gravel bars after flooding. It can also establish in early postfire environments, although the evidence is limited. | FEIS: Successional Status; Fire Adaptations and Plant Response to Fire [1] |
| Effect of fire exclusion on population | Insufficient information | The source does not provide explicit information about the effect of fire exclusion on Arizona sycamore populations. | FEIS: [1] |
| Is this species typically managed with prescribed fire? | Rarely/No | Little information was available on prescribed fire in southwestern riparian communities. While fire management in southwestern riparian areas may include fuel reduction and prescribed fire treatments that promote or maintain native vegetation and reduce or eradicate invasives, information is limited. One study recommends against burning in late-successional riparian woodlands because fire in those communities can be destructive and difficult to manage. | FEIS: Fire Management Considerations [1] |
| Predominant historical fire frequencies of ecosystem where it most commonly occurs | Frequent*; Infrequent* | Information on historical fire regimes in riparian areas of the Southwest is limited due to lack of data, and the variability of historical fire regimes within and among desert riparian areas is not well known. Available information suggests a range of historical fire frequencies: fires may have been infrequent in areas with periodic flooding that removed understory vegetation, but more common in communities with wider riparian zones and more developed vegetation. Fires burning from adjacent uplands may have burned out when reaching riparian woodlands, or riparian areas may have facilitated fire spread between other desert communities. | FEIS: Fire Regimes [1] |
| Predominant historical fire severity where it most commonly occurs | Insufficient Information | Information on historical fire regimes in southwestern riparian areas is limited due to lack of data, and the variability of historical fire regimes within and among desert riparian areas is not well known. Most fires were likely patchy and of low severity due to the patchiness of vegetation; however, mixed- and high-severity fires likely also occurred. | FEIS: Fire Regimes [1] |
| Predominant historical fire regime group where it most commonly occurs | Insufficient Information | In the warm desert riparian settings where Arizona sycamore is most common, LANDFIRE classifies larger rivers as Fire Regime Group 1 (infrequent, high severity fire) and smaller stringers as Group 5 (frequent, low-severity fire). Madrean oak (encinal) communities with Arizona sycamore likely experienced mostly frequent, low- and mixed-severity fires (group 1). LANDFIRE classifies southwestern Madrean pine-oak-juniper communities in groups 1 and 3 (moderately frequent, mixed-severity fire). However, these are general models, not specific to riparian areas with Arizona sycamore, and may not accurately describe the historical fire regimes where Arizona sycamore occurs. | FEIS: Fire Regimes [1] |
| Alters historical fuel characteristics of ecosystems where it occurs | Rarely/No | Arizona sycamore is native within its historical riparian range. The source attributes altered fuel characteristics and fire regimes to nonnative species such as tamarisk, Russian-olive, and Mediterranean grass rather than to Arizona sycamore. | FEIS: Fire Management Considerations [1] |
1. Fryer, Janet L. 2022. Platanus wrightii, Arizona sycamore. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Missoula Fire Sciences Laboratory (Producer). Available: https://research.fs.usda.gov/feis/species-reviews/plawri
Last updated August 25, 2026