Cornus florida (flowering dogwood) Cornaceae (4 4 4 1 epi) 306 -- lvs pale beneath; fr red

Cornus racemosa (gray-stem dogwood) Cornaceae (4 4 4 1 epi) 305 -- lvs oft papllse-wh bnth; fr leaden to wh; twigs gr to tan to gray brwn

Cornus rugosa (round-leaved dogwood) Cornaceae (4 4 4 1 epi) 304 -- lvs wh hairy to strigose; fr light blue; twigs lt or yellowish gr mottled w red

Cornus sericea (red-osier dogwood) Cornaceae (4 4 4 1 epi) 305 -- lvs distinctly whitened; fr wh; twigs bright red

Coronilla varia (crown vetch) Fabaceae (5 5 10 1 perf or unisex; peri) 268 --

Coronopus didymus (swine cress) Brassicaceae (4 4 4+2 1) 165

Coronopus squamatus (Eurasian swine cress) Brassicaceae (4 4 4+2 1) 165 --

Corydalis aurea (golden corydalis) Fumariaceae (2+2z 2 6 1) 067 --

Corydalis flavula (short-spurred corydalis) Fumariaceae (2+2z 2 6 1) 067 --

Corydalis sempervirens (tall corydalis) Fumariaceae (2+2z 2 6 1) 067 -- pink & yellow fls Corylus americana (American hazel-nut) Betulaceae 082 -- twigs hairy (glandular); lvs paler & + or - pubscnt beneath

Corylus cornuta (beaked hazel-nut) Betulaceae 082 -- twigs hairless (eglandular); lvs pale green beneath and + or - pubescent

Corylus sp. (hazel-nut) Betulaceae 082 -- lvs paler and + or - pubescent below

Corynephorus canescens (gray hair grass) Poaceae 713 --

Cosmos bipinnatus (common cosmos) Asteraceae/Heliantheae 509 --

Crassula aquatica (pygmy weed) Crassulaceae (4-5 4-5 4-5 1or0) 210 -- small plant; white, erect or sl spreading, axillary; OE linear, thick Crassulaceae (stonecrop) -- Crassula, Sedum, Sempervivum

Crataegus sp. (hawthorn) Rosaceae (5 5 N 1-5) 247-253 --

Crepis capillaris (hawksbeard) Asteraceae/Lactuceae 595 --

Crepis nicaeenis (hawksbeard) Asteraceae/Lactuceae 596 --

Crepis setosa (hawksbeard) Asteraceae/Lactuceae 596 --

Crepis tectorum (hawksbeard) Asteraceae/Lactuceae 595

Crepis vesicaria (hawksbeard) Asteraceae/Lactuceae 596 --

Crocus sp. (crocus) Iridaceae

Crotalaria sagittalis (rattlebox) Fabaceae (5 5 10 1 perf or unisex; peri) 260 -- yellow pea-shaped fl; prominent arrow-shaped stipules: AE sessile

Croton glandulosus (tooth-leaved croton) Euphorbiaceae (5-7 5-7 8-20 3 unixes hypo) 312 --

Croton monanthogynus Euphorbiaceae (5-7 5-7 8-20 3 unixes hypo) 312 --

Crotonopsis elliptica Euphorbiaceae (5 5 5 0/0 3-5 0 2) 313 --

Crypsis schoenoides Poaceae 744 --

Cryptogramma crispa (parsley fern) Adiantaceae 014

Cryptogramma stelleri (slender rock brake fern) Adiantaceae 014 --

Cryptotaenia canadensis (honewort) Apiaceae (5 5 5 2 epi) 346 -- lvs trifoliate; ridged petiole

Cucurbita foetidissima (wild pumpkin) Cucurbitaceae ((5) 5 3 1 unisex epi) 150 -- yellow fls

Cucurbitaceae (gourd) -- Cucurbita (wild pumpkin); Echinocystis(wild cucumber); Sicyos (bur cucumber)

Cunila origanoides (dittany) Lamiaceae ((5) (5) 2 1) 419 -- purplish clusters at end of long axillary branches; OT egg, nearly sessile

Cuphea viscosissima (blue waxweed) Lythraceae (6 6 11or12 1 peri) 293 -- purple; OE; stem hairy; dry soil

Cupressaceae (cypress) -- Chamaecyparis (atlantic white cedar); Juniperus (juniper); Thuja (arbor vitae)

Cuscuta compacta (compact dodder) Cuscutaceae 386 -- stigma in a head; (5) 5 5 1

Cuscuta cephalanthi (buttonbush dodder) Cuscutaceae 388 -- stigma in a head; (4) 4 4 1

Cuscuta coryli (hazel dodder) Cuscutaceae -- stigma in a head; (4) 4 4 1

Cuscuta epilinum (flax dodder) Cuscutaceae -- stigma not in a head; (5) 5 5 1

Cuscuta epithymum (clover dodder) Cuscutaceae -- stigma not in a head; (5) 5 5 1

Cuscuta europaea (European dodder) Cuscutaceae -- stigma not in a head; (4) 4 4 1

Cuscuta gronovii (common dodder) Cuscutaceae 387 -- stigma in a head; (5) 5 5 1

Cuscuta pentagona (five-angled dodder) Cuscutaceae 387 -- stigma in a head; (5) 5 5 1

Cuscuta polygonorum (knotweed dodder) Cuscutaceae -- stigma in a head; (4) 4 4 1

Cycloloma atriplicifolium (winged pigweed) Chenopodiaceae (0 5 5 0/0 5 0 3) 090 --

Cymbalaria muralis (Kenilworth ivy) Scrophulariaceae/Antirrhineae ((5) (5) 4 1 stigma 1) 448 -- fls bl w/ yllw palate; lf mny lbed, thin petiole

Cynodon dactylon (Bermuda grass) Poaceae 749 --

Cynoglossum officinale (hound's tongue comfrey) Boraginaceae ((5) (5) 5 1 hypo) 399 --

Cynoglossum virgianianum (wild comfrey) Boraginaceae ((5) (5) 5 1 hypo) 399 --

Cynosurus cristatus (dog's tail grass) Poaceae 699 -- short awn; 1infl, not interrupted

Cyperacae (sedge -- in perigynium) -- Carex

Cyperaceae (scales distichous) -- Cyperus, Dulichium

Cyperaceae (spikelets dimorphic) -- Scleria (stonerush)

Cyperaceae (with tubercle) -- Bulbostylis, Eleocharis (spike rush), Rhynchospora (beak rush)

Cyperaceae (achene subtended by bristles or scales) -- Eriophorum, Fuirena, Scirpus (bulrush)

Cyperaceae (not subtended) -- Bulbostylis, Fimbristylis, Cladium, Scirpus

Cyperus brevifolioides (short-leaved nutsedge) 657 -- one cone-like infl w/ 3 bracts

Cyperus croceus (nutsedge) 654 --

Cyperus dentatus (toothed flatsedge) 651 --

Cyperus diandrus (two-stemmed nutsedge) 657

Cyperus difformis (two-form nutsedge) 652 -- round balls

Cyperus echinatus (globe flat sedge) 654 --

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