Flora of North America species comparison

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Porophyllum scoparium

Porophyllum ruderale

shrubby poreleaf, trans-Pecos poreleaf

Bolivian coriander, yerba porosa
Habit Subshrubs or shrubs, 20–60+ cm; internodes mostly 10–30 mm.
Leaf

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

Florets

mostly 40–80+;

corollas yellow, 5–8 mm.

Phyllaries

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

Cypselae

3.5–5.5 mm;

pappi: longer bristles 6–7.5 mm.

2n

= 24.

Porophyllum scoparium

Porophyllum ruderale
Phenology Flowering spring–fall.
Habitat Sandy, gravelly, and rocky sites, calcareous or igneous soils, with desert scrub
Elevation 500–1400 m (1600–4600 ft)
Distribution
from FNA
NM; TX; Mexico (Chihuahua, Coahuila, Nuevo León)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM; TX; Mexico; Central America; South America; West Indies
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
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. gracile, P. greggii, P. pygmaeum, P. scoparium
Subordinate taxa
P. ruderale var. macrocephalum
Synonyms Kleinia ruderale
Name authority A. Gray: Smithsonian Contr. Knowl. 3(5): 119. (1852) (Jacquin) Cassini: in F. Cuvier, Dict. Sci. Nat. ed. 2, 43: 56. (1826)
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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