- Pilea pumila
name = Clearweed
image_width = 240px
image_caption = "Pilea pumila"
divisio = Magnoliophyta
genus = "
species = "P. pumila"
binomial = "Pilea pumila"
"Pilea pumila", known as Clearweed, Canadian clearweed, Coolwort, or Richweed is an annual plant native to most of
North Americaeast of the Rockies. The plants are generally erect, 10 to 70 cm tall, often occurring in large colonies, and are quite common throughout their range both as a woodland plant and a weed of gardens.
foliageis opposite, simple with dentate margins, wrinkly (with depressed veins), ovate, and with long petioles. Both the leaves and stems are translucent and bright green, turning bright yellow in autumn. The flowers are small, borne in axillary cymes, unisexual with both genders occurring on the same plant, greenish yellow, and pollinatedby wind. Flowers bloom from midsummer through early autumn. Fruits ( achenes) are green with purple markings. Roots are fibrous, shallow, and adventitiousoff the stem in moist areas or when in contact with the soil.
The plant is often mistaken for stinging nettle or
Urtica dioica, but can be distinguished by the lack of trichomes, or stinging hairs, and the lower amount of branching of the inflorescences.
This plant is most often found in rich, moist soils in both sunny and shaded locations. It is sometimes grown as a ground cover or for attracting
*P. D. Strausbaugh and Earl L. Core. "Flora of West Virginia". 2nd ed.
Seneca BooksInc., 1964. ISBN 0-89092-010-9, page 318
*Ann Fouler Rhoads and Timothy A. Block. "The Plants of Pennsylvania".
University of PennsylvaniaPress, 2000. ISBN 0-8122-3535-5, page 694
*Hortus Third, page 873
* [http://www.illinoiswildflowers.info/woodland/plants/clearweed.htm Illinoiswildflowers.info] ]
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