Asclepiadaceae NEBC: 01036665 Asclepias verticillata Linnaeus USA: Massachusetts Boston: Roxbury, Glen Road C. W. Swan 1880-8-12
Asteraceae NEBC: 00359924 Aster umbellatus Miller USA: Massachusetts Medford: Pine Hill [Middlesex Fells Reservat... C. W. Swan 1880-10-8
NEBC: 00566619 Bidens bipinnata Linnaeus USA: Massachusetts Lowell: Lowell C. W. Swan 1880-9-16
NEBC: 00359924 Doellingeria umbellata (Miller) Nees USA: Massachusetts Medford: Pine Hill [Middlesex Fells Reservat... C. W. Swan 1880-10-8
NEBC: 00535738 Helianthus laetiflorus Persoon USA: Massachusetts Boston: Boston, near R.R. [Railroad] C. W. Swan 1880-8-31
NEBC: 01037154 Pluchea odorata succulenta (Fernald) Cronquist USA: Massachusetts Boston: S [South] Boston Flats C. W. Swan 1880-9-8
Boraginaceae NEBC: 00375331 Cynoglossum officinale Linnaeus USA: Massachusetts Stoneham: Spot Pond [Middlesex Fells Reserva... C. W. Swan 1880-8-10
Brassicaceae NEBC: 01065476 Boechera canadensis (Linnaeus) Al-Shehbaz USA: Massachusetts Chelmsford: Chelmsford, Carlisle & Littlton ... C. W. Swan 1880-7-22
NEBC: 01007699 Boechera canadensis (Linnaeus) Al-Shehbaz USA: Massachusetts Chelsea: Chelsea C. W. Swan 1880-7-22
NEBC: 01023406 Cakile edentula (Bigelow) Hooker USA: Massachusetts Hull: Hull C. W. Swan 1880-7-14
Caryophyllaceae NEBC: 00581147 Agrostemma githago Linnaeus USA: Massachusetts Lowell: Lowell C. W. Swan 1880-7-4
GH: 00693616 Stellaria alsine Grimm USA: Massachusetts Andover: Andover, Haggett's Pond C. W. Swan 1880-8-6
NEBC: 00602988 Stellaria graminea Linnaeus USA: Massachusetts Andover: Haggetts Pond C. W. Swan 1880-8-6
Chenopodiaceae NEBC: 00593040 Chenopodium urbicum Linnaeus USA: Massachusetts Lowell: Lowell, near woollen mills C. W. Swan 1880-7-14
Cyperaceae NEBC: 00241173 Carex folliculata Linnaeus USA: Massachusetts Lowell: F. R. R. [Fitchburg Railroad?] C. W. Swan 1880-7-18
NEBC: 00299122 Carex intumescens Rudge USA: Massachusetts Lowell: C. W. Swan 1880-7-25
NEBC: 01029647 Carex pseudocyperus Linnaeus USA: Massachusetts Lowell: Lowell C. W. Swan 1880-7-5
NEBC: 00685554 Cyperus echinatus (Linnaeus) Wood USA: Massachusetts Boston: West Boston Flats C. W. Swan 1880-9-25
NEBC: 00685555 Cyperus echinatus (Linnaeus) Wood USA: Massachusetts Boston: Boston C. W. Swan 1880-9-25
Fabaceae NEBC: 00643381 Lathyrus palustris Linnaeus USA: Massachusetts Boston: Roxbury C. W. Swan 1880-5-25
NEBC: 00463277 Vicia cracca Linnaeus USA: Massachusetts Lowell: Lowell C. W. Swan 1880-7-18
Gentianaceae NEBC: 00574831 Menyanthes trifoliata minor Rafinesque USA: Massachusetts Lowell: Lowell C. W. Swan 1880-5-23
Geraniaceae NEBC: 00761072 Erodium cicutarium (Linnaeus) L'Heritier ex Aiton USA: Massachusetts Lowell: Lowell, Chase's Mill C. W. Swan 1880-7-14
Juncaceae NEBC: 01045737 Juncus militaris Bigelow USA: Massachusetts Dracut: Dracut, Long Pond C. W. Swan 1880-7-20
Lamiaceae NEBC: 00707472 Stachys hispida Pursh USA: Massachusetts Lowell: Lowell, near Concord River C. W. Swan 1880-7-14
NEBC: 00707473 Stachys hispida Pursh USA: Massachusetts Lowell: Lowell, Ayer's City C. W. Swan 1880
Liliaceae NEBC: 01182874 Maianthemum stellatum (Linnaeus) Link USA: Massachusetts Andover: Andover, Haggett's P. [Pond] C. W. Swan 1880-8-6
Malvaceae NEBC: 00679291 Malva parviflora Linnaeus USA: Massachusetts Lowell: Lowell, Chases' Mills C. W. Swan 1880-7-14
Onagraceae NEBC: 01073709 Circaea canadensis canadensis (Linnaeus) Hill USA: Massachusetts Lowell: Lowell, Fort Hill C. W. Swan 1880-7-14
Orobanchaceae NEBC: 00731305 Orobanche uniflora Linnaeus USA: Massachusetts Boston: Dorchester, near Mt. Bowdoin C. W. Swan 1880-5-6
Papaveraceae NEBC: 01014029 Fumaria officinalis Linnaeus USA: Massachusetts Lowell: Lowell C. W. Swan 1880-7-30
Plantaginaceae GH: 00078535 Gratiola aurea helveola Bartlett USA: Massachusetts Lowell: Swamp near Lowell C. W. Swan 1880
Poaceae NEBC: 01178492 Agrostis perennans (Walter) Tuckerman USA: Massachusetts Andover: Andover, Haggetts Pond C. W. Swan 1880-8-6
ECON: 00622991 Avena sativa Linnaeus USA: Massachusetts Gloucester: Gloucester C. W. Swan 1880-8-21
NEBC: 01045278 Brachyelytrum aristosum (Michaux) P. Beauvois ex Branner & Coville USA: Massachusetts Lowell: Lowell C. W. Swan 1880-7-16
NEBC: 01045279 Brachyelytrum aristosum (Michaux) P. Beauvois ex Branner & Coville USA: Massachusetts Lowell: Lowell, Osgoods Woods [probably Ayre... C. W. Swan 1880-7-16
NEBC: 01178226 Danthonia spicata (Linnaeus) P. Beauvois ex Roemer & Schultes USA: Massachusetts Boston: Roxbury, Glen Rd. C. W. Swan 1880-9-30
NEBC: 00609524 Digitaria ischaemum (Schreber) Muhlenberg USA: Massachusetts Boston: Dorchester, Lawrence Ave., C. W. Swan 60-2 1880-9-6
NEBC: 00594755 Eragrostis minor Host USA: Massachusetts Westford: Westford, Woolen MIlls C. W. Swan 1880-8-22
NEBC: 00359675 Leersia virginica Willdenow USA: Massachusetts Medford: Pine Hill. Middlesex Fells [Reserva... C. W. Swan 1880-8-19
NEBC: 00855619 Paspalum setaceum muehlenbergii (Nash) D. Banks USA: Massachusetts Andover: Andover, Haggetts Pond C. W. Swan 1880-8-6
NEBC: 00606301 Poa compressa Linnaeus USA: Massachusetts Lowell: Lowell (F.R.R.) [Fitchburg Railroad] C. W. Swan 1880-8-3
NEBC: 00606302 Poa compressa Linnaeus USA: Massachusetts Lowell: Lowell C. W. Swan 1880-8-3
NEBC: 01175064 Spartina pectinata Link USA: Massachusetts Chelmsford: Chelmsford C. W. Swan 1880-7-29
Polygonaceae NEBC: 00759610 Rumex obtusifolius Linnaeus USA: Massachusetts Lowell: Lowell C. W. Swan 1880-7-27
Ranunculaceae NEBC: 00697004 Ranunculus sceleratus Linnaeus USA: Massachusetts Brookline: Brookline, Pond Av. C. W. Swan 1880-5-25
Rosaceae NEBC: 00674202 Aronia melanocarpa (Michaux) Elliott USA: Massachusetts C. W. Swan 1880-5-23
NEBC: 00724427 Geum canadense Jacquin USA: Massachusetts Boston: Boston, Back Bay C. W. Swan 1880-8-21
NEBC: 00441519 Rosa palustris Marshall USA: Massachusetts Westford: Westford, Nabnasset Pond C. W. Swan 1880-7-7
NEBC: 00651168 Rubus hispidus Linnaeus USA: Massachusetts Westford: Westford C. W. Swan 1880-7-7
