Thelypteris noveboracensis, Dennstaedtia punctilobula
Clonal ferns such as Dennstaedtia punctilobula (Michx.) Moore (hayscented fern), Osmunda claytoniana L.
Six sites, in which the herb/shrub stratum was dominated by the clonal ferns Dennstaedtia punctilobula and Osmunda claytoniana, were randomly located within Harvard Forest property.
Six sites were chosen for study that had a prominent fern stratum composed primarily of Dennstaedtia punctilobula (hayscented fern) and Osmunda claytoniana (interrupted fern).
In each of the six experimental sites, three types of manipulations were randomly assigned to and implemented in 1-[m.sup.2] plots randomly located within clones of both Dennstaedtia punctilobula and Osmunda claytoniana.
Similarly, survival of Prunus serotina was reduced by aboveground interference but not belowground interference from Dennstaedtia punctilobula (Horsley 1993).
noveboracensis, Dennstaedtia punctilobula, Houstonia purpurea, Smilacina racemosa and Galium latifolia.
In contrast, shade-tolerant understory ferns and herbs such as Polysticum acrostichoides, Dennstaedtia punctilobula, Galium latifolium and Viola cucullata have only become more abundant as the forest matured.
Herbaceous vegetation was primarily hay-scented fern (Dennstaedtia punctilobula