Pilea microphylla

(Linnaeus) Liebmann

Naturvidensk. Math. Afd., ser. 5, 2: 296. 1851.

Common names: Artillery weed
Basionym: Parietaria microphylla Linnaeus Syst. Nat. ed. 10, 2: 1308. 1759
Treatment appears in FNA Volume 3.

Herbs, annual or short-lived perennial, 0.3-2 dm. Stems 10-40-branched, erect. Leaf blades spatulate to obovate, paired blades unequal, the larger 3-10 × 1.5-5.5 mm, the smaller 1.5-4 × 0.7-2 mm, margins entire. Inflorescences crowded. Flowers ca. 0.5 mm across. Achenes uniformly light brown, slightly compressed, ovoid-cylindric, ca. 0.5(-1.1) × 0.3 mm, smooth.

Phenology: Flowering all year.
Habitat: Waste places, hammocks, rocky woods, cultivated plots, on masonry
Elevation: 0-100 m


V3 288-distribution-map.gif

Fla., Ga., La., S.C., Mexico, West Indies, Central America, tropical South America, Pacific Islands (Hawaii), Asia.


Pilea microphylla has been collected once in Tennessee and once in Michigan, but it is unlikely that the species persists so far north. It is widely grown as a houseplant in the north and a border plant in the south. It is a greenhouse weed in various parts of the flora.

Selected References


Lower Taxa

... more about "Pilea microphylla"
David E. Boufford +
(Linnaeus) Liebmann +
Parietaria microphylla +
Artillery weed +
Fla. +, Ga. +, La. +, S.C. +, Mexico +, West Indies +, Central America +, tropical South America +, Pacific Islands (Hawaii) +  and Asia. +
0-100 m +
Waste places, hammocks, rocky woods, cultivated plots, on masonry +
Flowering all year. +
Naturvidensk. Math. Afd., ser. +
W1 +  and Illustrated +
Adicea +
Pilea microphylla +
species +