Matricaria maritima (scentless chamomile) Asteraceae/Anthemideae 519 -- white rays, 12-25; roadsides & waste pls.

Matricaria matricarioides (pineapple weed chamomile) Asteraceae/Anthemideae 519 -- discoid heads;

Matricaria recutita (chamomile) Asteraceae/Anthemideae 519 -- white rays, 10-20; aromatic Matteuccia struthiopteris (ostrich fern) Onocleaceae 029 -- Mazus miquelii (mazus) Scrophulariaceae/Gratioleae ((5) (5) 2 1 stigmas 2) 441 --

Mazus pumilus (mazus) Scrophulariaceae/Gratioleae ((5) (5) 2 1 stigmas 2) 441 -- fls bl-vilet marked w/ yllw & wh; lawns & wet bottomlands Medeola virginiana (Indian cucumber root) Liliaceae (3 3 6 3) 797 -- Medicago lupulina (black medick) 272 -- yellow w/ long pedicels; pod unarmed, glbrous; lflts w/ mucro tip

Medicago minima (downy bur clover) 272 -- yellow; pod spiny; AD trif, hairy

Medicago polymorpha (smooth bur clover) 272 -- yellow; pod spiny; very cut stipule

Medicago sativa subsp. falcata (yellow alfalfa) 271 -- yellow

Medicago sativa subsp. sativa (alfalfa) 271 -- blue-violet; pod hairy; upper OT; lower OE lance

Mecicago sp. (medick, alfalfa) Fabaceae (5 5 10 1 perf or unisex; peri) -- Melampyrum lineare (cow wheat) Scrophulariaceae/Euphrasieae ((5) (5) 2+2 1 stigma 1) 457 --

Melanthium hybridum (broad-leaved bunch flower) Liliaceae (3 3 6 3) 784 -- greenish-white flat pets; AE, broad grasslike

Melanthium virginicum (bunchflower) Liliaceae (3 3 6 3) 784 -- greenish-white crinkled pets; AE lance

Melilotus alba (white sweet clover) Fabaceae (5 5 10 1 perf or unisex; peri) 271 -- white fls; trifoliate, serrulate lvs

Melilotus altissima (tall sweet clover) Fabaceae (5 5 10 1 perf or unisex; peri) 271 -- yellow fls; pods pubescent (use lens); trifoliate, serrulate lvs

Melilotus indica (Indian sweet clover) Fabaceae (5 5 10 1 perf or unisex; peri) 271 -- yellow fls; glabrous pods; trifoliate, serrulate lvs

Melilotus officinalis (yellow sweet clover) Fabaceae (5 5 10 1 perf or unisex; peri) 271 -- yellow fls; glabrous pods; trifoliate, serrulate lvs

Melissa officinalis (common balm) Lamiaceae ((5) (5) 2+2 1) 412 --

Menispermaceae (moonseed) -- Menispermum

Menispermum canadense (Canada moonseed) Menispermaceae 63 -- 6-9 6/4/8 12-24 0/609 6 0 3

Mentha aquatica (water mint) 417 --fls in terminal globose heads; pedicels, calyx & lvs pubescent

Mentha arvensis (wild mint) 416-- fls lilac in axilary verticils (whorls) clumps; calyx pubescent; OT lvs egg-shpd or oblong

Mentha longifolia (horse mint) 417 -- spike infl; calyx tube pubescent

Mentha pulegium (penny royal) 417 -- spike infl; densely velvety; rarely adventive

Mentha sp. (mint) Lamiaceae ((5) (5) 2+2 1) --

Mentha spicata (spearmint) 418-- prplish or pinkish spk slnder, intrrptd, axilary & term; OT lvs sessile or nearly so; calyx tube glbrs

Mentha suaveolens 418 -- spike infl; calyx tube pubescent

Mentha x citrata (lemon mint) 417 -- fls in terminal globose heads;pedicels & calyx glabrous

Mentha x gentilis (red mint) 417 -- verticils (whorls); calyx glabrous

Mentha x piperita (peppermint) 417 -- purplish or pinkish, axillary & terminal spike; OT lvs stalked; calyx tube glabrous

Mentha x rotundifolia (mint) 418 -- spike infl; hybrid of longifolia & suaveolens

Mentha x verticillata (mint) 417 -- verticils (whorls); calyx pubescent Menyanthaceae (buckbean) -- Menyanthes, Nymphoides (floating heart)

Menyanthes trifoliata (buckbean) ((5) 5 5 1) Menyanthaceae 388 -- BD tri, heathing base of long petiole; white/purple tinged fls

Mercurialis annua (herb mercury) Euphorbiaceae (0 3 8-20 2 dioecious) 315 --

Mertensia maritima (seaside bluebell) Boraginaceae ((5) (5) 5 1 hypo) 396 --

Mertensia virginica (Virginia bluebells) Boraginaceae ((5) (5) 5 1 hypo) 396 --

Metasequoia glyptostroboides (dawn redwood) Taxodiaceae -- lvs to 1.5" , blue-green above; bark gray, fissured

Microstegium vimineum (Japanese stilt grass) Poaceae 772 -- infl often partly hidden by lf blades; fr almond shaped

Mikania scandens (climbing hempweed) Asteraceae/Eupatorieae 573 -- fls white or pink; lvs OT, heart-shaped, long ptd.

Milium effusum Poaceae 694 -- Mimulus alatus (winged monkey flower) 440 -- OT petioled; winged stem

Mimulus guttatus (common yellow monkey flower) 440 --

Mimulus moschatus (musky monkey flower) 440 --

Mimulus ringens (monkey flower) 440 -- OT sessile

Mimulus sp. (monkey flower) Scrophulariaceaea/Gratioleae ((5) (5) 2 1 stigmas 2) Mirabilis nyctaginea (heart-leaved umbrellawort) Nyctaginaceae 085 -- 0 5 3-5 0/0 5 3-5 1; dry soil, waste places Miscanthus sacchariflorus (Amur silvergrass) Poaceae 771 --

Miscanthus sinensis (eulalia) Poaceae 771 -- Mitchella repens (partridgeberry) Rubiaceae ((4) 4 4 1 epi) 471 -- white or pinkish fls; OT roundish Mitella diphylla (two-leaved mitrewort) Saxifragaceae (5 5 10 1 peri) 214 - wh in lng raceme; OL/OT stem lvs nrly stlkless; bsl lvs heart-shpd at base

Mitella nuda (naked mitrewort) Saxifragaceae (5 5 10 1 peri) 214 -- few, greenish fls w fringed pets; BT blunt, roundish

Modiola caroliniana (bristly mallow) Malvaceae (5 5 5 1 hypo) 134 -- small red-purple fls; AD, hairy stem & lf stalks

Molinia caerulea Poaceae 732 --

Molluginaceae (carpet weed) -- Mollugo (carpet weed)

Mollugo verticillata (carpetweed) Molluginaceae (0 5 3-10 0/ 0 5 0 2-5) 100 -- white fls axillary; prostrate; WE 5or6 linear

Monarda citriodora (citrus bergamot) 427 --

Monarda clinopodia (basil bee balm) 427 -- whitish or pinkish w dark spots; OT

Monarda didyma (Oswego tea) 428 -- scarlet; OT obscurely, heart-shaped base

Monarda fistulosa (wild bergamot) 427 -- lilac or pink; OT grayish, lance-chevron

Monarda media (purple bergamot) 428 -- deep red-purple; OT lance-chevron

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