Lespedeza stuevei — Stueve's bush-clover

Historic — Myles Standish SF, Plymouth (from 2010 backlog)

Calamagrostis pickeringii — Pickering's reedgrass

Endangered — Plymouth — 2 new locations; one of them — a favorite (illegal) spot for ORV riders

Sabatia campanulata — slender marsh-pink

Endangered — Falmouth

Rhynchospora nitens — short-beaked baldsedge

Threatened — Plymouth

Utricularia resupinata — resupinate bladderwort

Threatened — Plymouth (2 ponds)

Dichanthelium wrightianum — Wright's panic grass

Special Concern — Hyannis

Lachnanthes caroliniana — redroot

Special Concern — Plymouth, Hyannis

Polygonum puritanorum — pondshore smartweed

Special Concern — Plymouth

Rhynchospora scirpoides — long-beaked baldsedge

Special Concern — Plymouth (many locations)

Utricularia subulata — slender, subulate, or zigzag bladderwort

Special Concern — Plymouth

Eleocharis melanocarpa — black-fruited spike-rush

Watch-Listed — Plymouth. Many new finds and old photos ID'd in 2012

Eleocharis rostellata — saltmarsh spikerush, beaked spikerush

Watch-Listed — Dennis

Equisetum pratense — meadow horsetail

Watch-Listed — Heath

Equisetum variegatum — variegated scouring rush

Watch-Listed — from New Hampshire

Lycopus amplectens — pondshore water-horehound, sessile water-horehound

Watch-Listed — Plymouth (many locations)

Populus balsamifera — balsam poplar

Watch-Listed — Lee

Salix serissima — autumn willow

Watch-Listed — Sheffield

Scleria reticularis — pondshore nutsedge

Watch-Listed — Plymouth (many locations)

Stachys hyssopifolia — hyssop hedge-nettle

Watch-Listed — Plymouth and a known location in Hyannis

Viola rostrata — long-spurred violet

Watch-Listed — Williamstown, an old find, formerly misidentified

Sparganium eurycarpum — giant bur-reed

Unclear status in MA — Boston (Readville) and Milton

Polygonum careyi (Persicaria careyi) — Carey's smartweed

Indeterminate status in MA — Massasoit National Wildlife Refuge, Plymouth

Viburnum nudum var. nudum — smooth witherod

New for Massachusetts — Along railroad track, Cutler Park, Needham (railroad introduction or possible mis-ID)

Delosperma cooperi (Mesembryanthemum cooperi) — Cooper's hardy iceplant, trailing iceplant

New for Massachusetts — introduced from South Africa

Phragmites altissimus (australis ssp. altissimus) — giant reed

New for Massachusetts — invasive — Apparently, this is not a new plant but rather a new name for Massachusetts plant list. Following the treatment of Phragmites by Tzvelev (1976, 2012), we are transferring many of our reed records in eastern Massachusetts from P. australis to P. altissimus, a Mediterranean species. Alternatively, giant reed may be treated as a subspecies of P. australis.

Euonymus sieboldiana — Siebold's euonymus

New for Massachusetts — introduced — Escaped from Arnold Arboretum to Allandale Woods, Boston

Ilex crenata — Japanese holly or box-leaved holly

New for Massachusetts — introduced — Myles Standish SF, Plymouth. A second spotting of ours in the wild. The previous had been on S Ponkapoag Pond shore, Blue Hills Res., Canton, 2007.

Geranium thunbergii — dewdrop crane's bill

New for Suffolk County — introduced — in Arnold Arboretum lawns, Boston

Polygonum polystachyum (Persicaria wallichii, Reynoutria polystachya) — Himalayan knotweed, garden smartweed

New for Plymouth County — introduced from Asia — Plymouth. Escaped from cultivation. Identification not yet certain, may prove to be a new species in Massachusetts

Amaranthus blitum ssp. emarginatus — livid amaranth

New for Plymouth County — introduced — on Plymouth Long Beach road

Barbarea stricta — upright yellow rocket

New for Plymouth County — introduced — Myles Standish SF, Plymouth

Cenchrus spinifex — coastal sandbur

New for Plymouth County — introduced — Plymouth

Melissa officinalis — lemon balm

New for Plymouth County — introduced — Myles Standish SF, Plymouth

Mentha x villosa — woolly mint

New for Plymouth County — introduced — Myles Standish SF, Plymouth

Echium creticum — Cretian viper's bugloss

New for Norfolk County — introduced — Found along railroad in Cutler Park, Needham. Had been previously known only as a waif from Middlesex Co.

Boston. A possible introduction from Arnold Arboretum to nearby Allandale Woods or else a form of red maple

Aster pilosus var. pringlei (Symphyotricum pilosum var. pringlei) — Pringle's aster

Plymouth

Chamaecrista fasciculata — partridge pea

Plymouth

Cladium mariscoides — twig-sedge

Canton

Dichanthelium acuminatum var. implicatum — pondshore panic-grass

Hyannis, Plymouth

Dichanthelium spretum — smooth panic grass

Plymouth

Eleocharis flavescens var. olivacea — olive spike-rush

Plymouth. One of the most common species in this area

Myles Standish SF, Plymouth, ponds. Segregation of Fernald's varieties is not currently accepted; however, plants we have observed vary so strikingly that their differences cannot be ignored and might be best described within these varieties.

Myles Standish SF, Plymouth, ponds

Eleocharis palustris — creeping spike-rush

Blue Hills Res., Milton

Eleocharis robbinsii — Robbins' spike-rush

A very common plant in Plymouth ponds, but seen flowering for the first time

Eleocharis tuberculosa — tubercled spikerush

Plymouth

Eleocharis uniglumis — saline spike-rush, one-glumed spike-rush

First seen 2011, ID 2012, Ellisville Saltmarsh, Plymouth

Equisetum x litorale — shore horsetail

from New Hampshire

Eragrostis pectinacea — tufted lovegrass

Plymouth

Erechtites hieracifolius var. megalocarpus — seaside pilewort

Plymouth

Galium obtusum — blunt-leaved bedstraw or large marsh bedstraw

From 2011 backlog, Needham

Gratiola neglecta — mud hedge-hyssop

Plymouth

Gymnocarpium dryopteris — oak fern

Heath

Helianthemum propinquum — low frostweed, low rockrose

Plymouth

Hieracium scabrum — rough hawkweed

Plymouth

Juncus acuminatus — sharp-fruited rush

Plymouth

Juncus militaris — bayonet rush

Plymouth

Leersia oryzoides — rice cut-grass

Plymouth

Mentha canadensis — American field mint

Plymouth

Najas gracillima — slender naiad

Plymouth

Panicum verrucosum — Warty panic-grass

Plymouth

Potamogeton bicupulatus — hairlike pondweed

Plymouth

Potamogeton gramineus — grassleaf pondweed

Myles Standish SF, Plymouth

Potamogeton pulcher — spotted pondweed

Boxford (from 2009 backlog)

Sheffield

Rhynchospora macrostachya — big-headed horned sedge

Plymouth, Hyannis

Rumex orbiculatus (britannica) — great water dock

Sudbury (and Wareham?)

Salix lucida — shining willow

Heath, and North Walpole, New Hampshire

Scirpus smithii — Smith's club-sedge

Plymouth

Scirpus subterminalis — water bulrush, floating bulrush

Myles Standish SF, Plymouth, ponds

Strophostyles helvola — beach bean

Found as adventive plant, Boston

Triplasis purpurea — purple sandgrass

Plymouth

Egeria densa — Brazilian waterweed, Brazilian elodea

invasive — A known location in Framingham

Abutilon theophrasti — velvet-leaf

introduced — Myles Standish SF, Plymouth

Aira caryophyllea — silvery hairgrass

introduced — Wareham (from 2011 backlog)

Aquilegia vulgaris — garden columbine, European columbine

introduced — Along road, Randolph

Arctium lappa — great burdock

introduced — Boston, Plymouth

Calamagrostis epigeios — feathertop, bushgrass

introduced — Plymouth

Chenopodium glaucum — oak-leaf goosefoot

introduced — Plymouth

Clematis terniflora — yam-leaf clematis

introduced — Dennis

Cotoneaster divaricatus — spreading cotoneaster

introduced — Dennis

Fragaria x ananasa — garden strawberry

introduced — Middlesex Fells Res., Medford (from 2011 backlog)

Helianthus tuberosus — Jerusalem artichoke

introduced — Must be deliberate introduction to a small wetland in Allandale Woods, Boston

Hieracium piloselloides — smooth hawkweed

introduced — Plymouth

Lespedeza cuneata — Chinese bush-clover

introduced — Plymouth, Falmouth. Formerly misidentified, corrected by Tom Palmer

Lycopus europaeus — European water horehound

introduced — Houghton's Pond, Blue Hills Res., Milton (from 2011 backlog)

Pinus nigra — Austrian pine

introduced — Planted. Old photos, formerly misidentified. Quincy

Poa annua — annual bluegrass

introduced — Myles Standish SF, Plymouth

Scrophularia nodosa — wood figwort

introduced — Plymouth

Viola tricolor — garden violet

introduced — Myles Standish SF, Carver (perhaps a waif).

Eupatorium novae-angliae (E. leucolepis var. novae-angliae) — New England or pondshore boneset

Endangered. This is a previously known location. Our point is that trucks are enjoying access to the pond while going literally through the population of the endangered plant!

Lychnis flos-cuculi — ragged robin

Introduced from Europe. New for Suffolk County

Lonicera maackii — Amur honeysuckle

Introduced from Asia. Invasive — New for Suffolk County (must have escaped the Arboretum grounds)

Froelichia gracilis — slender cottonweed

In addition to previously reported locations in Plymouth and Barnstable Co., a large portion of Rt. 3 (roughly Exit 13 through 15) is now taken by this plant. Besides, it has been noticed along Rt. 93 between Exit 3 to 5 (new for Norfolk Co.) We apologize for photo quality: photographed on the go; an attempt to reach those areas on foot was unsuccessful.

Buddleja davidii — butterfly bush, summer lilac

Already recorded from Barnstable, Middlesex, and Plymouth Co. This is a fourth location for wild-growing butterfly bush in Massachusetts and the second in Plymouth Co. known to us. Considered invasive in many countries

Epigaea repens — trailing arbutus, mayflower

first time spotted in fruit

Helianthemum canadense — longbranch frostweed

We don't know how common the autumn chasmogamous flowering in Helianthemum is. During the phenologically abnormal season of 2012, we observed it multiple times in late August/September

Honckenya peploides — seabeach sandwort

in flower

Drosera filiformis — thread-leaf sundew

in flower