The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

California pellitory, pelitory, rillita pellitory, unknown

pellitory, Pennsylvania pellitory

Habit Herbs, annual, 0.2-5.5 dm. Herbs, annual, 0.4-6 dm.
Stems

simple or freely branched, sometimes densely matted, prostrate, decumbent, ascending, or erect.

simple or freely branched, decumbent, ascending, or erect.

Leaf

blades narrowly to very broadly ovate, oblong, orbiculate, or reniform, 0.2-4.5 × 0.2-2.7 cm, base broadly cuneate, rounded, truncate, or nearly cordate, apex acuminate, acute, obtuse, or rounded;

proximal pair of lateral veins arising at junction of blade and petiole.

blades narrowly to broadly elliptic, lanceolate, oblong, or ovate, (1-)2-9 × 0.4-3 cm, base narrowly cuneate, apex acuminate to long-attenuate or obtuse to rounded;

proximal pair of lateral veins arising above junction of blade and petiole.

Flowers

involucral bracts 1-4.5 mm;

tepals 2-2.8 mm, shorter or longer than bracts.

involucral bracts 1.8-5 mm, usually less than 2 times length of achene;

tepals 1.5-2 mm, shorter than bracts.

Achenes

light brown, symmetric, 0.9-1.2 × 0.6-0.7 mm, apex obtuse, mucro apical;

stipe centered, short-cylindric, basally dilated.

light brown, symmetric, 0.9-1.2 × 0.6-0.9 mm, apex obtuse, mucro apical;

stipe straight, short-cylindric, centered, basally dilated.

2n

=14, 16.

Parietaria hespera

Parietaria pensylvanica

Phenology Flowering spring–late fall.
Habitat Dry ledges, talus slopes, waste and shaded places, primarily in neutral to basic soils, and reported from margins of hot springs in northernmost locations
Elevation 0-2400 m [0-7900 ft]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Some extremes of Parietaria pensylvanica with short, oblong or ovate leaf blades strongly resemble P. hespera var. hespera. Parietaria hespera is usually more delicate and has thinner leaves with the proximal pair of lateral veins arising at the junction of blade and petiole. Leaf shape and texture tend to overlap in the two species, but in P. pensylvanica the proximal pair of lateral veins clearly arise above the junction of blade and petiole. The extremes of P. pensylvanica frequently are found where the ranges of the two species approach or overlap. Examples of these intermediates are from Gila, Mohave, and Yuma counties, Arizona. A mixed collection from Rock Springs, Gila County, Arizona, suggests that the two species occasionally grow together.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Distribution
from FNA
AZ; CA; NM; NV; UT; Mexico
[WildflowerSearch map]
from FNA
AL; AR; AZ; CA; CO; CT; DC; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; ON; QC; SK; YT; Mexico
[WildflowerSearch map]
[BONAP county map]
Parent taxa Urticaceae > Parietaria Urticaceae > Parietaria
Sibling taxa
P. floridana, P. judaica, P. pensylvanica, P. praetermissa
P. floridana, P. hespera, P. judaica, P. praetermissa
Subordinate taxa
P. hespera var. californica, P. hespera var. hespera
Key
1.Tepals erect, loosely connivent, apex acute; leaf blades conspicuously longer than wide, base broadly cuneate, rounded, or truncate.P. hespera var. hespera
1.Tepals spreading or recurved and twisted at maturity, distinct, apex long-acuminate, attenuate, or caudate; leaf blades as long as or slightly longer than wide, base rounded to nearly cordate.P. hespera var. californica
Synonyms P. obtusa, P. occidentalis, P. pensylvanica var. obtusa
Name authority B. D. Hinton: Sida 3: 293. (1969) Muhlenberg ex Willdenow: Sp. Pl. 4(2): 955. (1806)
Source Flora of North America vol. 3. Flora of North America vol. 3.
Web links