On House Field the most common forbs were _Vernonia baldwini_, _Verbena stricta_ and _Solanum carolinense_. On Quarry Field, _Solidago_ spp. and _Asclepias_ spp. were also abundant. All of them seemed to be used by the voles for food during the early stages of growth, when they were tender and succulent. The fruits of the horse nettle (_Solanum carolinense_) were also eaten. The forbs themselves did not provide cover dense enough to constitute good vole habitat. Mixed in a grass dominated association they nevertheless raised the carrying capacity above that of a pure stand of grass. Other forbs noted often enough to be considered common on both House Field and Quarry Field included _Carex gravida_, observed frequently in House Field and less often in Quarry Field; _Amorpha canescens_, more common in Quarry Field; _Tradescantia bracteata_, _Capsella bursapastoris_, _Oxalis violacea_, _Euphorbia marginata_, _Convolvulus arvensis_, _Lithospermum arvense_, _Teucrium canadense_, _Physalis longifolia_, _Phytolacca americana_, _Plantago major_, _Ambrosia trifida_, _A. artemisiifolia_, _Helianthus annuus_, _Cirsium altissimum_ and _Taraxacum erythrospermum_. Both areas were being invaded from one side by forest-edge vegetation; the woody plants noted included _Prunus americana_, _Rubus argutus_, _Rosa setigera_, _Cornus drummondi_, _Symphoricarpus orbiculatus_, _Populus deltoides_ and _Gleditsia triacanthos_. In House Field the herbaceous vegetation was much more lush than in Quarry Field and woody plants and weeds were more abundant. A graveled and heavily used road along one edge of House Field, leading to the Reservation Headquarters, was a barrier which voles rarely crossed. A little-used dirt road crossing the trapping plot in Quarry Field constituted a less effective barrier. The disturbed areas bordering the roads were likewise little used and tended to reinforce the effects of the roads as barriers. There were almost pure stands of _Bromus japonicus_ along both roads. No mammal of any kind was taken in traps set where this grass was dominant.