Aquatic and Wetland Vascular Plants of the Northern Great Plains
10. Urticaceae, the Nettle Family
1. Pilea Lindl. -- Clearweed1. Pilea fontana (Lunell) Rydb.
Plants 1-4 dm tall, often decumbent. Leaf blades mostly 1.5-6 cm long, 1-4 cm wide; petioles mostly 0.5-5 cm long. Flower clusters spreading 0.5-5 cm from the stem, the male flowers usually innermost in the clusters when mixed with female flowers. Achenes dark olivaceous to nearly black with a narrow pale margin, 1.3-2 mm long, the persistent sepals shorter than to slightly exceeding the achene. Late Jul--Sep. Cold springs, seeps and boggy places; uncommon and scattered, mainly in ND and SD; (P.E.I. to ND, s to VA and FL, IN and NE).
 Pilea fontana |
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