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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