Carex typhina (212.cattail sack sedge) 687 -- 3; teeth well-dev; genie bottle w toothed beak; cylindrical, leafy bracts; Squarrosae

Carex umbellata (102.umbelled sack sedge) 673 -- end cluster; Montaneae;

Carex utriculata (218.bottle-shaped sack sedge) 665 -- Vesicariae; wet soil or shallow water

Carex vaginata (114.sheathed sack sedge) 674 -- elongated, sl, bracts; Paniceae;

Carex venusta (150.graceful sack sedge) 679 --

Carex vesicaria (216.bladder sack sedge) 688 -- Vesicariae;

Carex vestita (170.clothed sack sedge) 682 -- Hirtae

Carex virescens (160.greenish sack sedge) 680 --

Carex viridula (153.greenish sack sedge) 679 --

Carex vulpinoidea v. ambigua (33.fox-like sack sedge) 665 -- lvs do not surpass infl; the old C. annectans

Carex vulpinoidea v. vulpinoidea (33.fox-like sack sedge) 665 -- 2; teeth well dev; lvs surpass infl

Carex wiegandii (52.Wiegand's sack sedge) 667 --

Carex willdenowii (90.Willdenow's sack sedge) 672 --solitary, unruly; Phyllostachyae; moist woods, esp in acid soils; chfly coastal

Carex woodii (113.woods sack sedge) 674 -- elongated, sl, bracts; Paniceae;

Carlina vulgaris (carlina) Asteraceae/Cynareae 584 --

Carpinus caroliniana (musclewood) Betulaceae 082 -- muscular-looking bark

Carum carvi Apiaceae (5 5 5 2) 348 --

Carya cordiformis (bitternut hickory) Juglandaceae 073 -- lflts 5-11; buds sulfur-yellow; frs smallest

Carya glabra (pignut hickory) Juglandaceae 074 -- lflts 5-7; fr small, w 4 sl. wings; upland woods

Carya lacinosa (shellbark hickory) Juglandaceae

Carya ovata (shagbark hickory) Juglandaceae 074 -- lflts 5-7

Carya tomentosa (mockernut hickory) Juglandaceae 073 -- lflts 7-9; silvery buds

Caryophyllaceae (pink) evident stipules -- Herniaria; Paronychia; Spergula; Spergularia

Caryophyllaceae seps distinct -- Arenaria; Cerastium; Holosteum; Honckenya; Sagina; Scleranthus; Stellaria Caryophyllaceae seps form tube -- Agrostemma; Dianthus; Gypsophila; Lychnis; Petrorhagia; Saponaria; Silene;Vaccaria

Castanea dentata (American chestnut) Fagaceae 076 --

Castilleja coccinea (painted cup) Scrophulariaceae/Euphrasieae ((5) (5) 2+2 1 stigma 1) 458 --

Castilleja septentrionalis Scrophulariaceae/Euphrasieae ((5) (5) 2+2 1 stigma 1) 458 --

Castilleja sessiliflora Scrophulariaceae/Euphrasieae ((5) (5) 2+2 1 stigma 1) 458 --

Catalpa bignonioides (southern catalpa) Bignoniaceae ((5) (5) 2+2 1 hypo) 462 --

Catalpa speciosa (northern catalpa) Bignoniaceae ((5) (5) 2+2 1 hypo) 461 -- lvs hairy below

Caulophuyllum thalictroides (blue cohosh) Berberidaceae (6 6 6 1) 062 --

Ceanothus americanus (New Jersey tea) Rhamnaceae (5 5 5 1) 321

Ceanothus herbaceus Rhamnaceae (5 5 5 1) 321 --

Cedrus atlanticus (Atlas cedar)

Celastrus orbiculatus (Asian bittersweet) Celastraceae (5 5 5 0/5 5 0 1) -- 308 -- axillary clusters, lvs rounded

Celastrus scandens (American bittersweet) Celastraceae (5 5 5 0/5 5 0 1) 308 -- fls in terminal clusters; lvs finely toothed & pointed Celastraceae (bittersweet) -- Celastrus, Euonymus

Celtis laevigata (hackberry) Ulmaceae 069

Celtis occidentalis (northern hackberry) Ulmaceae 069

Celosia argentea (celosia) Acanthaceae (0 5 5 1) --

Cenchrus longispinus (common sandbur) Poaceae 769 -- spines slender, numerous, 45-75; widespread

Cenchrus tribuloides (dune sandbur) Poaceae 770 -- spines broader at base, fewer, 40 or less; coastal

Centaurea americana (knapweed) 585 --

Centaurea calcitrapa (purple-star thistle knapweed) 586 -- invol bracts spine-tipped

Centaurea cyanus (knapweed) 584 -- stem hairy; fls mostly blue

Centaurea diffusa (tumble knapweed) 585 -- invol bracts spine-tipped; white fls

Centaurea dubia (short-fringed knapweed) 585 -- old C. vochinensis; bl tips; marginal fls enlarged & ray-like

Centaurea jacea (brown knapweed) 584 -- tan or brown tips

Centaurea maculosa (spotted knapweed) 585 -- AD; black-fringed bracts; lvs divided

Centaurea melitensis (Maltese star thistle knapweed) 586 -- invol bracts spine-tipped; lf bases wing stem; stem hry; fls yellow

Centaurea nigra (black knapweed) 585 -- black tips

Centaurea repens (Russian knapweed) 585 --

Centaurea solstitialis (yellow star thistle) 586 -- invol bracts spine-tipped; stem hairy; fls yellow

Centaurea sp. (knapweed) Asteraceae/Cynareae -- Centaurium erythraea (forking centaury) Gentianaceae ((4-5) 4-5 4-5 1) 363 --

Centaurium pulchellum (branching centaury) Gentianaceae ((4-5) 4-5 4-5 1) 363 --

Centaurium spicatum (spike centaury) Gentianaceae ((4-5) 4-5 4-5 1) 363 --

Centunculus minimus (chaffweed) Primulaceae ((4) 4 4 1) 203

Cephalanthus occidentalis (buttonbush) Rubiaceae ((4) 4 4 1 epi) 471 -- white, tubular in round, ball-like heads; OE, egg

Cerastium arvense (field chickweed) (5 5 10 5) 102 -- OE lvs fat linear; stem hairy; pets much longer than sep; perennial

Cerastium brachypetalum (chickweed) (5 5 10 5) 102 -- seps w long hairs

Cerastium nutans (chickweed) (5 5 10 5) 103 -- OE fat linear

Cerastium semidecandrum (5 5 10 5) 103 -- OE ellip, small

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