Abutilon icanum, also known as hoary abutilon, pelotazo, pelotazo chico, tronadora, and maʻo (Hawaiʻi), is a shrub widespread throughout the arid, warm regions of the southwestern United States and northern Mexico as well as Hawaiʻi.
It grows to between 0.5–2 metres (1.6–6.6 ft) in height; the leaves are ovate to lance-ovate in shape, with crenate margins, and sizes ranging from 0.5–3 centimetres (0.20–1.18 in) in width and 1.5–6 centimetres (0.59–2.36 in) in length. The solitary 5-petaled flowers are generally orange; in ssp. incanum they are 6–10 millimetres (0.24–0.39 in) long and orange-yellow, while in ssp. pringlei they are just 4–6 millimetres (0.16–0.24 in) and a deep orange with maroon spots. The 5–8-millimetre (0.20–0.31 in) fruits are capsules with 4–6 cells.
It favors rocky slopes and gravelly flats, and occurs in arroyos, at elevations up to 1,370 metres (4,490 ft). Requiring warm-season rain and mild winters, it is found in the Sonoran Desert, but not the Mojave Desert. In Hawaiʻi, maʻo can be found growing in dry forests and low shrublands at elevations from sea level to 220 metres (720 ft).
- Botanic Gardens Conservation International (BGCI); IUCN SSC Global Tree Specialist Group (2019). "Abutilon incanum". IUCN Red List of Threatened Species. 2019: e.T96817101A149010215. doi:10.2305/IUCN.UK.2019-3.RLTS.T96817101A149010215.en. Retrieved 1 March 2023.
- "NatureServe Explorer - Abutilon incanum". NatureServe Explorer Abutilon incanum. NatureServe. 2022-06-22. Retrieved 22 Jun 2022.
- "Abutilon incanum". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 2009-03-13.
- "mao". Hawaii Ethnobotany Online Database. Bernice P. Bishop Museum. Retrieved 2009-03-13.[permanent dead link]
- Fryxell, Joan (1983). "A revision of Abutilon sect. Oligocarpae (Malvaceae), including a new species from Mexico". Madroño. 30.
- McNair, D.M.; J. Fox; R. Lindley; S.D. Carnahan; M.E. Taylor; E. Makings (2018). "Identifying Abutilon parishii (Malvaceae) and similar species in Arizona and Sonora" (PDF). Phytoneuron.