Plant Database (by name)

redtop panicgrass - Panicum rigidulum Bosc ex Nees var. elongatum (Pursh) Lelong

redtop panicgrass - Panicum rigidulum Bosc ex Nees var. pubescens (Vasey) Lelong

redtop panicgrass - Panicum rigidulum Bosc ex Nees var. rigidulum

redtwig doghobble - Eubotrys recurva (Buckl.) Britt.

redvein dock - Rumex sanguineus L.

redwhisker clammyweed - Polanisia dodecandra (L.) DC. ssp. dodecandra

redwood - Sequoia sempervirens (Lamb. ex D. Don) Endl.

redwood insideout flower - Vancouveria planipetala Calloni

redwood keckiella - Keckiella corymbosa (Benth. ex A. DC.) Straw

redwood lily - Lilium rubescens S. Wats.

redwood-sorrel - Oxalis oregana Nutt.

redwool plantain - Plantago eriopoda Torr.

reed - Phragmites Adans.

reed canarygrass - Phalaris arundinacea L.

reflexed flatsedge - Cyperus refractus Engelm. ex Boeckl.

reflexed sedge - Carex retroflexa Muhl. ex Willd.

Regel's rush - Juncus regelii Buch.

rescuegrass - Bromus catharticus Vahl

resinbush - Viguiera stenoloba Blake

resindot sunflower - Helianthus resinosus Small

resurrection fern - Pleopeltis polypodioides (L.) Andrews & Windham ssp. polypodioides

Reveal's buckwheat - Eriogonum contiguum (Reveal) Reveal

Reverchon's bristlegrass - Setaria reverchonii (Vasey) Pilger

Reverchon's hawthorn - Crataegus reverchonii Sarg.

reversed clover - Trifolium resupinatum L.

revolute hypnum moss - Hypnum revolutum (Mitt.) Lindb.

rhizome bluegrass - Poa rhizomata A.S. Hitchc.

rhizome fleabane - Erigeron rhizomatus Cronq.

rhizomnium moss - Rhizomnium pseudopunctatum (Bruch & Schimp.) T. Kop.

rhizomnium moss - Rhizomnium punctatum (Hedw.) T. Kop.

Rhodes grass - Chloris gayana Kunth

rhododendron - Rhododendron L.

rhodora - Rhododendron canadense (L.) Torr.

rhodotypos - Rhodotypos Sieb. & Zucc.

rhytidium moss - Rhytidium rugosum (Hedw.) Kindb.

ribbed murainagrass - Ischaemum rugosum Salisb.

ribbed sedge - Carex virescens Muhl. ex Willd.

ribbonleaf pondweed - Potamogeton epihydrus Raf.

ribseed sandmat - Chamaesyce glyptosperma (Engelm.) Small

rice - Oryza sativa L.

rice button aster - Symphyotrichum dumosum (L.) Nesom var. dumosum

rice cutgrass - Leersia oryzoides (L.) Sw.

ricefield flatsedge - Cyperus iria L.

Richard's yelloweyed grass - Xyris jupicai L.C. Rich.

Richardson's calliergon moss - Calliergon richardsonii (Mitt.) Kindb. in Warnst.

Richardson's geranium - Geranium richardsonii Fisch. & Trautv.

Richardson's needlegrass - Achnatherum richardsonii (Link) Barkworth

Richardson's pondweed - Potamogeton richardsonii (Benn.) Rydb.

Richardson's sedge - Carex richardsonii R. Br.

richweed - Collinsonia canadensis L.