95% 
R. pulcher L. Dock 
Java Farm. One station: grassy patch at entrance gate. Hectare 
2463. Associated with Cyperus strigosus, Perilla frutescens, Trifolium 
spp. Higman 1084. 
R. obtusifolius L. Bitter Dock 
Java Farm. One station: on Fox Point Road just before turn eastward 
to Fox Point; in front of old barn. Hectare 3543, 
Ivy Neck. One station: abandoned road through forest on Scaffold 
Peninsula. Canopy of Liquidambar styraciflua, Robinia pseudoacacia, 
Nyssa sylvatica, Morus rubra. Higman 523, 976. 
Tovara 
Tovara virginiana (L.) Adans,. 
(Polygonum virginianum L.) Virginia Knotweed 
Java Farm. Infrequent; seems to prefer moist, partly shaded sites. 
At entrance gate; along entrance road under canopy of Quercus alba, 
Fagus grandifolia, Liquidambar styraciflua, etc.; on moist valley of 
Muddy Creek under canopy of Fraxinus americana and Platanus occidentalis; 
and at main buildings. Higman 38, 65, 354, 538. 
Polygonum 
1. Plant prostrate-spreading; flowers in axillary 
FASCIcleS, ..ccrsecccesccccescevessessccvececsresevseees BP. aviculare 
1. Plant erect; flowers in spiciform racemes or panicles, 
or capitate. 
2. Stem prickly; leaves sagittate or hastate. 
3. Leaves sagittate; inflorescence capitate........ P. sagittatum 
3. Leaves hastate, the basal lobes horizontally 
spreading; inflorescence a short raceme or 
PAmUCWe:. (oi. <\ fellate lokebofoie «teks Clekoks) ote lexeietereNalelieveustetelee wis oy Leen AtskOlenum 
2. Stem smooth; leaves elliptic. 
4, Ocreae (sheathing stipules) without marginal cilia. 
