Parietaria floridana
Parietaria pensylvanica
Florida pellitory
Pennsylvania cucumber plant, Pennsylvania pellitory, rock pellitory
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
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.)
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