1899] Plants introduced by Minot Pratt at Concord, Mass. 171 
Tris cristata, Ait., a single station, at which last year the plant was 
nearly extinct, but this year again growing well. 
Convallaria majalis, L., three stations, spreading. 
Trillium nivale, Pursh, spreading. 
Trillium grandiflorum, Salisb., only two or three plants left. 
Abies balsamea, Marsh., three or four trees on Ponkawtasset. 
Thuja occidentalis, L., like the preceding. 
Asplenium angustifolium, Michx., one station. 
Camptosorus rhizophyllus, Link, three stations." 
Aspidium Goldianum, Hook., spreading. 
Cystopteris bulbifera, Bernh., two stations. 
PLANTS SET OUT BY MR. PRATT WHICH HAVE NOT BEEN FOUND IN 
RECENT YEARS: 
ALFRED W. HOSMER. 
Ranunculus Pennsylvanicus, L. f. Boltonia asteroides, L'Her. 
Jsopyrum biternatum, Torr & Gray. Silphium laciniatum, L. 
Draba arabisans, Michx. Silphium terebinthinaceum, L. 
Viowa rostrata, Muhl. Coreopsis trichosperma, Michx. 
Viola striata, Ait.? Helenium autumnale, L. 
Viola Canadensis, L. Onopordon acanthium, L. 
Viola cornuta, L. Lobelia syphilitica, L. 
Petalostemon violaceus, Michx. Vaccinium Vitis-Idaea, L. 
Geum triflorum, Pursh. Periploca Graeca, L. 
Dalibarda repens, L. Hydrophyllum Virginicum, L. 
Mitella diphylla, L? Symphytum officinale, L. 
Ribes Cynosbati, L. Mertensia Virginica, DC. 
Aralia quinquefolia, Gray. Calamintha Clinopodium, Benth. 
Sambucus racemosa, L. Lophanthus anisatus, Benth. 
Eupatorium ageratoides, L. Dirca palustris, L. 
Liatris spicata, Willd. Parietaria Pennsylvanica, Muhl. 
Solidago squarrosa, Muhl. Orchis spectabilis, L. 
Solidago tenuifolia, Pursh. Habenaria obtusata, Richards. 
1 Podophyllum peltatum, L., Oxalis violacea, L., Monarda didyma, L., and 
Asarum Canadense, L., are believed to have been established at Concord prior to 
Mr. Pratt's work, although he may have transplanted some individuals. All these 
species are thriving and spreading at their Concord stations. 
2 Again set out by other persons within five years. 
3 Not found since 1893. 
