Flora of North America species comparison

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Porophyllum scoparium

Porophyllum gracile

shrubby poreleaf, trans-Pecos poreleaf

odora, slender poreleaf
Habit Subshrubs or shrubs, 20–60+ cm; internodes mostly 10–30 mm. Subshrubs or shrubs, 20–70 cm; internodes mostly 10–30 mm.
Leaf

blades mostly filiform, 10–40 × 1–2 mm.

blades linear to filiform, 20–50 × 1–5 mm.
Florets

mostly 40–80+;

corollas yellow, 5–8 mm.

(5–)12–30;

corollas whitish to purplish, 6–9 mm.
Phyllaries

7–10, oblanceolate to linear, 6–10 mm.

5, oblong to linear, 9–15 mm.
Cypselae

3.5–5.5 mm;

pappi: longer bristles 6–7.5 mm.

6–10 mm;

pappi: longer bristles 7–9 mm.
2n

= 24.

= 48.

Porophyllum scoparium

Porophyllum gracile
Phenology Flowering spring–fall. Flowering late winter–early summer; fall.
Habitat Sandy, gravelly, and rocky sites, calcareous or igneous soils, with desert scrub Sandy, gravelly, and rocky sites (usually granitic) with desert scrub
Elevation 500–1400 m (1600–4600 ft) 200–2100 m (700–6900 ft)
Distribution
from FNA
NM; TX; Mexico (Chihuahua, Coahuila, Nuevo León)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; NM; TX; Mexico (Baja California, Sonora)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 234. FNA vol. 21, p. 234.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Pectidinae > Porophyllum Asteraceae > tribe Heliantheae > subtribe Pectidinae > Porophyllum
Sibling taxa
P. gracile, P. greggii, P. pygmaeum, P. ruderale
P. greggii, P. pygmaeum, P. ruderale, P. scoparium
Name authority A. Gray: Smithsonian Contr. Knowl. 3(5): 119. (1852) Bentham: Bot. Voy. Sulphur, 29. (1844)
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 Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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