Egeria densa (Brazilian waterweed) Hydrocharitaceae (3 3 9 0/3 3 0 ?) 606 --

Elaeagnaceae (oleaster) -- Elaeagnus (elaeagnus); Shepherdia (rabbit berry)

Elaeagnus angustifolia (Russian olive) Elaeagnaceae (0 4 4 1 perfect or unisex; peri) 288 -- lvs silvery dotted, 3-8 (l x w); fr yellow w/ silvery scales

Elaeagnus commutata (silverberry) Elaeagnaceae (0 4 4 1 perfect or unisex; peri) 288 -- lvs silvery lepidote, 1.5-3 (l x w); fr densely silvery

Elaeagnus umbellata (autumn-olive) Elaeagnaceae (0 4 4 1 perfect or unisex; peri) 288 -- lvs soon green & glabrescent above; fr red w/ pale scales

Elatine minima (waterwort) Elatinaceae (2 2 2 2)125 -- forms small mats on mud; inconsp axillary fls; lvs oblong to narowly obovate, small Eleocharis acicularis (needle spike rush) 639 -- diminutive plant; filiflorm; spklt thcker than stem; scales w/ grnish midrib; marshes, muddy shores & wet pls.

Eleocharis caribaea (spike rush) 642 -- spikelet ovoid; achene black, shining, obovoid; irregular in north

Eleocharis compressa (flattened spike rush) 640 -- like E. tenuis; marshes & shores

Eleocharis equisetoides (horsetail spike rush) 639 -- spikelet scarcely thicker than stem (terete); kernelly-looking spikelet; shallow water near the coast

Eleocharis fallax (deceitful spike rush) 642 -- brackish swamps along coast

Eleocharis flavescens (yellowish spike rush) 642 -- chiefly on coastal plain

Eleocharis intermedia (intermediate spike rush) 640 -- densely cespitose; wet soil

Eleocharis melanocarpa (black-fruited spike rush) 639 -- trigonous, funny-looking achene; densely cespitose; mostly near the coast

Eleocharis microcarpa (small-fruited spike rush) 641 -- slender stems; spikelet ovoid or oblong; acid swamps near coast

Eleocharis ovata (ovate spike rush) 642 -- thick stem & fat spklt; cespitose; scales prplsh or brownish w/ greenish midstrip, hyaline margins ;marshes/ wet pls.

Eleocharis palustris (marsh spike rush) 641 -- rhizamatous; stems slender to very stout; wet pls, tolerant of salt & alkali

Eleocharis parvula (very small spike rush) 638 -- confluent tubercle; diminutive; wet, saline or alkaline sites

Eleocharis pauciflora (few-flowered spike rush) 638 -- confluent tubercle; wet calcareous shores & boggy places

Eleocharis quadrangulata (four-angled spike rush) 639 -- spikelet scarcely thicker than stem (quadrangular); kernelly-looking spikelet; shallow water

Eleocharis robinsii (Robbin's spike rush) 639 -- spikelet scarcely thicker than stem (triangular); mud or shallow water

Eleocharis rostellata (small-beaked spike rush) 638 -- confluent tubercle; coastal

Eleocharis sp. (spike rush) Cyperaceae -- achene crowned w/ a tubercle (the style base)

Eleocharis tenuis (slender spike rush) 640 -- stems slender, 4-8 angled; wet pls.

Eleocharis tortilis (twisted spike rush) 641 -- stems very slender, sharply trigonous; swamps & bogs, chiefly coastal

Eleocharis tricostata (three-ribbed spike rush) 639 -- pine barren ponds

Eleocharis tuberculosa (tubercled spike rush) 641 -- stems flattened, very thin; spikelet ovoid, acute; chiefly near coast, wet, esp. sandy soil

Eleocharis wolfii (marsh spike rush) 639 -- trigonous achene; stems flattened; marsh

Eleusine indica (goose grass) Poaceae 741 -- Elodea canadensis (common waterweed) Hydrocharitaceae (3 3 9 0/3 3 0 ?) 606 --

Elodea nuttallii (free-flowered waterweed) Hydrocharitaceae (3 3 9 0/3 3 0 ?) 606 --

Ellisia nyctelea (water pod) Hydrophyllaceae ((5) (5) 5 1 hypo) 394 --

Elsholtzia ciliata Lamiaceae ((5) (5) 2+2 1) ((5) (5) 2+2 1) 420 -- fls pale blue; lvs chevron-shaped, long petioled; Asian, moist soil

Elymus canadensis (Canada wild rye grass) Poaceae 725 -- long awns, hairy spikelets; dry to moist fields & streambanks

Elymus hystrix (bottle-brush grass) Poaceae 726 -- spikelets not hairy

Elymus riparius (streambank wild rye grass) Poaceae 726 -- lvs glabrous; spikelets not hairy; moist woods & streambanks

Elymus trachycaulus (slender wheat wild rye grass) Poaceae 725 -- not hairy spikelets; long awns; various habitats

Elymus villosus (downy wild rye grass) Poaceae 725 -- hairy spikelets; dry woods and banks

Elymus virginicus (wild rye grass) Poaceae 726 -- lvs scabrous on both sides; spikelets not hairy; moist woods, meadows

Elytrigia dasystachya (thickspike wheat grass) Poaceae 727 --

Elytrigia repens (quack grass) Poaceae 459 -- old Agropyron repens -- back to stem; rachilla not curved

Elytrigia smithii (western wheatgrass) Poaceae 727 --

Empetraceae (crowberry) -- Empetrum (crowberry); Corema (broom crowberry)

Empetrum nigrum (crowberry) Empetraceae (4 4 4 1) 183 --

Epifagus virginiana (beechdrops) Orobanchaceae (fls dimorphic; upper (4) (5) 2+2 1 hypo) 459 -- fls whitish w prpl-brwn blotches; NONE

Epigaea repens (trailing arbutus) Ericaceae ((5) 5 10 1) 190 -- fls pink or white; lvs leathery, oval, rounded or heart-shaped at base, AE Epilobium angustifolium (narrow-leaved willow herb) 296 -- AE lanceolate, pale beneath

Epilobium brachycarpum (annual willow herb) 298 --

Epilobium ciliatum (American willow herb) 298

Epilobium coloratum (purple-leaved willow herb) 298 -- lvs AT/OT lance, gray-green, sometimes purplish

Epilobium glandulosum (northern willow herb) -- pink to lilac; OT shallow, broadly lance

Epilobium hirsutum (hairy willowherb) 297 -- rose-purple; OT lance, sharply toothed; stem stout, hairy

Epilobium leptophyllum (American marsh willow herb) 297 -- long, erect frs; OE

Epilobium palustre (marsh willow herb) 297

Epilobium sp. (wllow herb) Onagraceae (4 4 8 1 epi) 297-298 --

Epilobium strictum (downy or northeastern willow herb) 297 -- OE linear; stem & lvs downy whitish or grayish

Epipactis helleborine (helleborine orchid) Orchidaceae (2+1z 3 1-2 3) 814 -- AE egg or lance, clasping

Equisetum arvense (field horsetail) Equisitaceae 007 -- fertile & sterile stems unlike; fr spring; fertile stems whitish to brownish

Equisetum fluviatile (swamp horsetail) Equisitaceae 006 -- fertile & sterile stems alike; fr summer

Equisetum hyemale (common scouring rush) Equisitaceae 005 --stems evergreen, no whorled branches

Equisetum palustre (marsh horsetail) Equisitaceae -- fertile & sterile stems alike; fr summer

Equisetum pratense (meadow horse tail) Equisitaceae 006 -- fertile & sterile stems unlike; fr spring; sheath teeth blackish w/ pale margins

Equisetum scirpiode (dwarf scouring rush) Equisitaceae -- stems evergreen, no whorled branches

Equisetum sylvaticum (woodland horsetail) 007 -- fertile & sterile stems unlike; fr spring; teeth in sev broad, brown lobes

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