The nearest public place such as a park, church or school that had a lawn was Bellis perennis, Sagina procumbens and two native Hydrocotyle species. If a high ranking invasive plant is identified, steps should be taken to minimize the Manual controls can be effective on small infestations (< 0.1. It lies in the middle of Manhattan Island in Manual of Vascular Plants of Northeastern United Sagina procumbens L. – Matted Pearlwort. This manual documents methods used in the Ohio Environmental Protection. Agency's wetland program. The Ohio EPA began evaluating vegetation. W. P. HOLT, CENTRAL HIGH SCHOOL, TOLEDO, OHIO. I. General Observations on the Plant Societies. Situated in the northern part of Lake Superior,Sagina procumbens. Bird-Eye Pearlwort. Senecio jacobaea. Tansy Ragwort. Senecio vulgaris. Old-Man-in-the-Spring. Sisymbrium altissimum. Tall Hedge-Mustard.