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Florida pellitory

Pennsylvania cucumber plant, Pennsylvania pellitory, rock pellitory

Habit Herbs, annual or short-lived perennial, 1-4 dm. Herbs, annual, 0.4-6 dm.

10-20-branched, decumbent to ascending.

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


blades orbiculate to deltate, 0.7-2.7 × 0.5-1.7 cm, base truncate, rounded, or very broadly cuneate, apex smoothly attenuate or occasionally slightly acuminate.

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.


involucral bracts 1.5-2 mm;

tepals ca. 1.5 mm, nearly equal to bracts.

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

tepals 1.5-2 mm, shorter than bracts.


light brown, symmetric, 0.5-0.8 × 0.3-0.6 mm or less, apex obtuse, mucro ±apical;

stipe centered, short-cylindric, abruptly flared basally.

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

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


=14, 16.

Parietaria floridana

Parietaria pensylvanica

Phenology Flowering winter–spring. Flowering spring–late fall.
Habitat Weedy places, around masonry, woodland and shrub borders, shell mounds, sandy beaches, roadsides, Atlantic and Gulf coastal plains 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 0-30 m (0-100 ft) 0-2400 m (0-7900 ft)
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DE; FL; GA; LA; MS; NC; SC; TX; Mexico; South America; West Indies
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Parietaria praetermissa has been misidentified as P. floridana by some authors.

(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.)

Source FNA vol. 3. FNA vol. 3.
Parent taxa Urticaceae > Parietaria Urticaceae > Parietaria
Sibling taxa
P. hespera, P. judaica, P. pensylvanica, P. praetermissa
P. floridana, P. hespera, P. judaica, P. praetermissa
Synonyms P. nummularia P. obtusa, P. occidentalis, P. pensylvanica var. obtusa
Name authority Nuttall: Gen. N. Amer. Pl. 2: 208. (1818) Muhlenberg ex Willdenow: Sp. Pl. 4(2): 955. (1806)
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