Flora of North America species comparison

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Petalonyx parryi

Petalonyx nitidus

Parry's sandpaper plant

shiny-leaf sandpaper plant, smooth sandpaper plant
Habit Shrubs, bushy to moundlike, to 15 dm; branches of current season to 13 cm. Subshrubs or shrubs, bushy to moundlike, to 6 dm; branches of current season 11–37 cm.
Leaves

petiole 0.5–3.5 mm;

blade ovate to elliptic, without marked size dimorphism, to 40 × 30 mm, base acute to rounded, margins usually crenate to serrate, sometimes small leaves entire, apex acute.

petiole 1–4 mm;

blade ovate, without marked size dimorphism, to 35 × 28 mm, base acute to obtuse, margins serrate to dentate, apex acute.
Inflorescences

35–65-flowered.

10–30-flowered.
Flowers

strongly bilaterally symmetric;

petals spatulate, 10–15 mm, claws postgenitally distally coherent, forming slitted corolla tube;

stamens exserted laterally through slits between petal claws.

slightly bilaterally symmetric through curvature along length of flower;

petals spatulate, 6–11 mm, claws postgenitally distally coherent, forming slitted corolla tube;

stamens exserted laterally through slits between petal claws.
2n

= 46.

= 46.

Petalonyx parryi

Petalonyx nitidus
Phenology Flowering Apr–Jul. Flowering Mar–Aug.
Habitat Wash bottoms, desert plains, usually white to gray, clayey soils. Sandy, gravelly, or rocky canyon slopes, arroyo bottoms, scrub.
Elevation 400–1300 m. (1300–4300 ft.) 400–2200 m. (1300–7200 ft.)
Distribution
from FNA
AZ; NV; UT
[BONAP county map]
from FNA
AZ; CA; NV; UT
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 12, p. 544. FNA vol. 12, p. 544.
Parent taxa Loasaceae > Petalonyx Loasaceae > Petalonyx
Sibling taxa
P. linearis, P. nitidus, P. thurberi
P. linearis, P. parryi, P. thurberi
Name authority A. Gray: Proc. Amer. Acad. Arts 10: 72. (1874) S. Watson: Amer. Naturalist 7: 300. (1873)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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