Ranunculus fascicularis (early buttercup) (5-7 5 N N) 055 -- fl stalk long; lance-shaped or narrow lf divisions

Ranunculus ficaria (lesser celandine) (8-12 3-4 N N) 058 -- lvs heart-shaped

Ranunculus flabellaris (yellow water crowfoot) (5 5 N N) 057 -- achenes turgid; submerged lvs threadlike

Ranunculus flammula (creeping spearwort) (5 5 N N) 057 -- low, creeping plant of shores; pet 3-7mm; BE oblance

Ranunculus hispidus (hispid buttercup) (5-8 5 N N) 055 -- largest lflts 1-1.5" long; dry pls.

Ranunculus hispidus v caricetorium (swamp buttercup) (5-8 5 N N) 055 -- largest lflts 1.5-4" long & wedge-shaped

Ranunculus longirostris (white water buttercup) (5 5 10-20 N) 058 -- aquatic

Ranunculus micranthus (small flowered crowfoot) (5 5 N N) 056 -- basal (not us subcordate) & cauline lvs unlike

Ranunculus parviflorus (stickseed crowfoot) (5 5 N N) 056 -- achenes papillate or spiny

Ranunculus pensylvanicus (bristly crowfoot) (5 5 N N) 054 -- pale yellow, pet 2-5mm; hairy plant; side lflts stalkless

Ranunculus pusillus (low spearwort) (1-5 5 10orless N) 057 -- stems weak; pets 2mm, = to or little shorter than seps

Ranunculus recurvatus (hooked crowfoot) (5 5 N N) 054 -- 2-5mm pets & seps; stem hairy; AT/AL 3 egg-shaped segments

Ranunculus repens (creeping buttercup) (5 5 N N) 054 -- lvs dk green, us mottled

Ranunculus sardous (buttercup) (5-8 5 N N) 055 -- achenes papillate or spny weed

Ranunculus sceleratus (cursed crowfoot) (5 5 N N) 057-- pale yellow fls; achns turgid; stem not hairy; lvs dply cleft, not div; wet pls

Ranunculus sp. (buttercup) Ranunculaceae --

Ranunculus subrigidus (white water buttercup) (5 5 5-10 N) 058 -- aquatic; lvs of R. longirostris, achenes of R. trichophyllus

Ranunculus testiculatus (bur buttercup) (5 5 N N) 058 -- pale yellow fading to whitish w/ pink veins; fr a bur; occ

Ranunculus tricophyllus (white water buttercup) (5 5 10-25 N) 058 -- aquatic

Raphanus raphanistrum (wild radish) Brassicaceae (4 4 4+2 1) 163 -- fls pale yellow or white w/ purple veins

Raphanus sativus (radish mustard) Brassicaceae (4 4 4+2 1) 163 --

Ratibida columnifera (columnar coneflower) Asteraceae/Heliantheae 498 --

Ratibida pinnata (gray headed coneflower) Asteraceae/Heliantheae 498 -- disk gray or brown, anise-scented; AD 3-7 lance, toothed

Reseda luteola (dyer's rocket) Brassicaceae (4 4 4+2 1) 182 --

Rhamnaceae (buckthorn) -- Ceanothus, Rhamnus

Rhamnus alnifolia (American or alder-leaved buckthorn) Rhamnaceae (0 5 5 1) 322 -- to 3 feet; lvs AT, 6-8 vein pairs; swamps & bogs

Rhamnus cathartica (common buckthorn) Rhamnaceae (4 4 4 1) 322 -- lvs ovate WE opp/subopp 2/ 3-5 vein pairs; many branches spiny-tipped

Rhamnus citrifolia (buckthorn) Rhamnaceae (4 4 4 1) 322 -- many lvs OE opp/subopp

Rhamnus frangula (European buckthorn) Rhamnaceae (5 5 5 1) 321 -- lvs obovate,AE all of mostly alt with 8-9 vein pairs.; wet soil

Rhexia aristosa (bristly meadow beauty) Melastomataceae ( 4 4 4 1 epi) 303 --

Rhexia mariana (dull meadow beauty) Melastomataceae ( 4 4 4 1 epi) 304 -- pale purple; OT lance, narrowed to short stalk

Rhexia virginica (wing stem meadow beauty) Mealastomataceae ( 4 4 4 1 epi) 303 -- br purple; OT egg or oval, sessile

Rhinanthus crista-gali (yellow rattle) Scrophulariaceae/Euphrasieae ((5) (5) 2+2 1 stigma 1) 457 -- yellow; OT sessile Rhododendron calendulaceum (orange flowered azalea) Ericaceae ((5) 5 5 1) 186

Rhododendron canadense (rhodora) Ericaceae ((3/2) 5 10 1) 186 -- rose-purple, upper lipped 3-lobed; AE

Rhododendron maximum (rosebay rhododendron) Ericaceae ((5) 5 5 1) -- fls pink or white 1.5-2" wide; lvs us fine-woolly beneath

Rhododendron periclymenoides (pinkster flower) Ericaceae ((5) 5 5 1) 185 -- lf below hairy on midrib only

Rhododendron prinophyllum (mountain azalea) Ericaceae ((5) 5 5 1) -- like pink azalea but fls very fragrant; lf blw sft-hairy; rocky woods

Rhododendron viscosum (swamp azalea) Ericaceae ((5) 5 5 1) 185 -- fls sticky-hairy, very fragrant; lf hairy on midrib below

Rhodotypos scandens (jet bead) Rosaceae -- fr black beads; OT egg, silky hairy beneath, double toothed somewhat

Rhus aromatica (fragrant sumac) Anacardiaceae (5 (5) 5 1 hypo) 334 -- lf base V-shaped, upper 2/3s many-lobed

Rhus copallinum (winged sumac) Anacardiaceae (5 (5) 5 1 hypo) 334 -- winged branches

Rhus glabra (smooth sumac) Anacardiaceae (5 (5) 5 1 hypo) 334 --

Rhus typhina (staghorn sumac) Anacardiaceae (5 (5) 5 1 hypo) 334 -- hairy

Rhynchospora alba (white beakrush) 646 -- downward bristles; sphagnum bogs & open conifer swamps

Rhynchospora capillacea (hair-like beakrush) 647 -- downward bristles; calcareous swamps, bogs, shores

Rhynchospora capitellata (small-headed beakrush) 647 -- downward bristles; bogs & wet sands

Rhynchospora cephalantha (flower-headed beakrush) 646 -- downward bristles; solitary, term, perfect fl; wet acid soil on the coastal plain

Rhynchospora chalarocephala (loose-headed beakrush) 646 -- downward bristles; solitary, term, perfect fl; coastal plain acid swamps & bogs

Rhynchospora filifolia (thread-leaved beakrush) 648 -- upward bristles; smooth achenes; pine barren bots on coastal plain

Rhynchospora fusca (dusky beakrush) 647 -- upward bristles; smooth achenes; bogs & marshes

Rhynchospora globularis (globular beakrush) 650 -- upward bristles; sculptured achenes; swamps, bogs, wet soil

Rhynchospora glomerata (clustered beakrush) 647 -- downward bristles; bogs & wet sands

Rhynchospora gracilenta (slender beakrush) 648 -- upward bristles; smooth achenes; bogs & wet soil on coastal plain

Rhynchospora inundata (inundated beakrush) 645 -- infl very unruly; swamps & pond margins

Rhynchospora knieskernii (Knieskern's beakrush) 647 -- downward bristles; pine barren bogs

Rhynchospora macrostachya (large-spiked beakrush) 645 -- looks like the one w/ galls; huge spikes; triquestrous stem; swamps near the coast

Rhynchospora microcephala (tiny-headed beakrush) 647

Rhynchospora nitens (beakrush) 645 -- wet, sandy soil & bogs

Rhynchospora oligantha (few-flowered beakrush) 647 -- bristles strongly plumose; pine barren bogs

Rhynchospora pallida (pale beakrush) 647 -- upward bristles; smooth achenes; acid bogs along the coast

Rhynchospora rariflora (few-flowered beakrush) 649 -- upward bristles; sculptured achenes; bogs & wet soil on the coastal plain

Rhynchospora scirpoides (scirpus-like beakrush) 647 -- wet, sandy soil

Rhynchospora sp. (beakrush) Cyperaceae -- achene crowned with a tubercle

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