Rhynchospora torreyana (Torrey's beakrush) 649 -- upward bristles; sculptured achenes; wet sandy or peaty soil oncoastal plain Ribes americanum (eastern black currant) 207 -- 5+; bl fr

Ribes cynosbati (dog gooseberry) 206 -- short, plump fls; prickly, greenish to pale red fr

Ribes hirtellum (gooseberry) 206 -- tubular fls, solitary; smooth greenish-purple fr

Ribes lacustre (spiny swamp currant) 206 -- prickly; dk purple or bl fr

Ribes nigrum (garden black currant) 206 -- short plump fls; bl fr; resinous glands on lvs below

Ribes rotundifolium (Appalachian gooseberry) 205-- solitary; pale prpl fr; lvs glbrs/minutely villosulous

Ribes sativum (garden red currant) 207 -- 5+; red fr

Ribes sp. (gooseberry) Grossulariaceae ((4)5 (4)5 (4)5 1) -- ovary peri, us epi

Ribes triste (swamp red currant) 207 -- 5+; red fr; bogs & wet woods

Ribes uva-crispi (garden gooseberry) 206 -- ciliate margined seps bigger than pets; fr red, yellow or green, pubescent Ricinus communis (castor bean) (5 5 N 3 unisex hypo) 311 -- large fl raceme; lvs 6-11 lobed, peltate Riccia fluitans (riccia) liverwort; when abundant, may pile up in a green mass on shore or form a netlike sheet on surface

Riccia natans (riccia) -- a liverwort Ricciocarpus natans -- a liverwort that often forms dense purple-green masses on pond surfaces Robinia hispida (bristly locust) Fabaceae (5 5 10 1 perf or unisex; peri) 262 --

Robinia pseudoacacia (black locust) Fabaceae (5 5 10 1 perf or unisex; peri) 262 -- Rorippa amphibia (yellow cress) Brassicaceae (4 4 4+2 1) 177 --yellow fls; annual, pets = seps; fr shorter than pedicels, cylindric

Rorippa austriaca (field yellow cress) Brassicaceae (4 4 4+2 1) 177 -- yellow fls; annual, pets = seps; fr shorter than pedicels, globose

Rorippa indica (Indian yellow cress) Brassicaceae (4 4 4+2 1) 177 -- yellow fls; perennial; pets surpass sep; AT

Rorippa nasturtium-aquaticum (water yellow cress; water cress) Brassicaceae (4 4 4+2 1) 177 -- white fls; annual, pets = seps;

Rorippa palustris (marsh yellowcress) Brassicaceae (4 4 4+2 1) 178 -- yellow fls; annual, pets = seps;

Rorippa sinuata (western yellow cress) Brassicaceae (4 4 4+2 1) 177 -- lt yellow fls; perennial; pets surpass sep; auriculate lvs

Rorippa sylvestris (creeping yellowcress) Brassicaceae (4 4 4+2 1) 177 -- yellow fls; perennial; pets surpass sep; auriculate lvs Rosa acicularis (bristly rose) 240 -- hypanthium & pedicel glabrous; straight, slender prickles; stipules hairy on margin

Rosa arkansana (dwarf prairie rose) 239 -- hypanthium & pedicel glabrous;

Rosa blanda (smooth rose) 240-- hypanthm & pedicel glabrous; very narrow stipules; upper stems at most w a few weak prickles

Rosa canina (dog rose) 239 --lfstalk pubescent; seps unlike in size & shape

Rosa carolina (pasture rose) 239 -- to 3ft; 5-9 lflts; hypanthium & pedicel stipitate-glandular; narrow, winged-victory stipules

Rosa eglanteria (sweetbriar rose) 238 -- lfstalk pubescent; seps unlike in size Y shape

Rosa gallica (French rose) 238 -- lfstalk pubescent; fls solitary (no bract) at branch tips; stout, hooked prickles

Rosa majalis (cinnamon rose) 240 -- hypanthium & pedicel glabrous;

Rosa micrantha 238 -- dark rose fls

Rosa multiflora (multiflora rose) 237 -- numerous white fls; stipules fringed; styles united into a column; lflts 3 or 5

Rosa palustris (swamp rose) 239 -- hypanthium & pedicel stipitate-glandular; stout & us hooked prickles

Rosa pimpinellifolia (scoth rose) 238 -- white or yellow white fls; fls solitary (no bract) at branch tips

Rosa rugosa (wrinkled rose) 238 -- various colored fls; lf stem w dense bristles; lflets dk green shining, deeply veined

Rosa sp. (rose) Rosaceae (5 5 N N) --

Rosa virginiana (Virginia rose) 239--to 6ft; 2-4 pairs lflts; hypanth&pedcl stiptte-glandlr; brdly wngd stipules; thorns stout,curved

Rosa wichuraiana (memorial rose) 237 -- white fls; lf stem pubescent; pubescent styles united into column; 7or 9 lflt;

Rosaceae (rose) Spiraeeae -- Physocarpus, Porteranthus, Sorbaria, Spiraea -- fr a follicel

Rosaceae (rose) Potentilleae -- Duchesnea, Filipendula, Fragaria, Geum, Potentilla, Waldsteinia; fr an achene

Rosaceae (rose) Rubeae -- Dalibarda, Rubus; fr a drupe or drupelets

Rosaceae (rose) Sanguisorbeae -- Agrimonia, Alchemilla, Aphanes, Sanguisorba; fr an achene

Rosaceae (rose) Roseae -- Rosa; fr a rose hip

Rosaceae (rose) Pruneae -- Prunus; fr a drupe

Rosaceae (rose) Pomeae -- Amelanchier, Aronia, Crataegus, Pyrus, Sorbus -- fr a pome

Rotala ramosior (tooth cup) Lythraceae (4 4 4 1 peri) 291 --

Rubiaceae (madder) -- Asperula, Cephalanthus (buttonbush), Diodia (buttonweed), Galium, Hedyotis (bluets), Mitchella, Sherardia (field madder)

Rubus alleghaniensis (highbush blackberry) 233 -- glndlr hairs on pedicels; term primocane lflt lvs 3/5x wide as long

Rubus argutus (tall blackberry) 234 -- elongate terminal lflt; thorns only on main stems

Rubus caesius (European dewberry) 231 -- rooting; sparse stout hooked prickles; trifoliate, soft pubescent beneath

Rubus canadensis (smooth blackberry) 233 -- 5 lflts ellip, long, thin-ptd, glabrous beneath; 4of5 lflt stalks short; not prickly in infl

Rubus cuneifolius (sand black berry) 233 -- lflts woolly beneath; dry, sandy soil; chiefly on coastal plain

Rubus enslenii (southern dewberry) 232 -- rooting; lf stalks not prickly

Rubus flagellaris (northern dewberry) 232 -- rooting; prickly stem; fl 1" wide; lf stalk not prickly

Rubus hispidus (swamp dewberry) 231 -- rooting; trifoliate

Rubus idaeus (red raspberry) 230 -- lvs trifoliate; pedicels w straight weak bristles

Rubus illecebrosus (strawberry raspberry) 231 -- sparse wide-based prickles, glabrous; lflts 5-9, trifoliate at end

Rubus laciniatus (evergreen blackberry) 235 -- coarse, heavily armed; lflts green beneath

Rubus occidentalis (black raspberry) 230 -- stems strongly glaucous at least the first year; trifoliate, lobed to look like 5 lflts

Rubus odoratus (purple flowering raspberry) 229 -- rose purple; AL/AT bristly hairs

Rubus orarius (black berry) 233 -- like R allegheniensis; term lflt of primocane, ovoid; lvs 3/4-1x wide as long

Rubus pensilvanicus (Pennsylvania blackberry) 234 -- 5 lflts soft over softly pubescent; prickly in the infl

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