- All About Potentilla Procumbens Sibthorp
- All About Silver Cinquefoil
- All About Potamogeton Dimorphus Raf.
- All About Narrowleaf Pondweed
- All About Potamogeton Longiligulatus Fern.
- All About Potamogeton Pusillus L. Var. Rutiloides (Fern.) Boivin
- All About Potamogeton Rutilus Auct. Non Wolfgang [misapplied]
- All About Potamogeton Strictifolius Benn. Var. Rutiloides Fern.
- All About Potamogeton Strictifolius Benn. Var. Typicus Fern.
- All About Vasey's Pondweed
- All About Potamogeton Lateralis Morong P.p.
- All About Flatstem Pondweed
- All About Potamogeton Pusillus L. Var. Pusillus L. [superfluous Autonym]
- All About Potamogeton ×rectifolius Benn. [nodosus × Richardsonii]
- All About Richardson's Pondweed
- All About Potamogeton Perfoliatus L. Ssp. Richardsonii (Benn.) Hultén
- All About Potamogeton Perfoliatus L. Var. Richardsonii Benn.
- All About Robbins' Pondweed
- All About Potamogeton ×spathuliformis (J.W. Robbins) Morong (pro Sp.) [gramineus × Illinoensis]
- All About Potamogeton Varians Morong
- All About Spiral Pondweed
- All About Potamogeton Berchtoldii Fieber Var. Acuminatus Fieber
- All About Potamogeton Berchtoldii Fieber Var. Colpophilus (Fern.) Fern.
- All About Potamogeton Berchtoldii Fieber Var. Lacunatus (Hagstr.) Fern.
- All About Potamogeton Berchtoldii Fieber Var. Mucronatus Fieber
- All About Potamogeton Berchtoldii Fieber Var. Polyphyllus (Morong) Fern.
- All About Potamogeton Berchtoldii Fieber Var. Tenuissimus (Mert. & Koch) Fern.
- All About Potamogeton Pusillus L. Var. Mucronatus (Fieber) Graebn.
- All About Potamogeton Pusillus L. Var. Tenuissimus Mert. & Koch
- All About Small Pondweed (Potamogeton Pusillus L.)
- All About Potamogeton Pusillus L. Var. Gemmiparus J.W. Robbins
- All About Small Pondweed (Potamogeton Pusillus L. Ssp. Pusillus)
- All About Potamogeton Lateralis Morong P.p.
- All About Potamogeton Panormitanus Biv.
- All About Potamogeton Panormitanus Biv. Var. Major G. Fisch.
- All About Potamogeton Panormitanus Biv. Var. Minor Biv.
- All About Potamogeton Pusillus L. Var. Minor (Biv.) Fern. & Schub.
- All About Small Pondweed (Potamogeton Pusillus L. Ssp. Tenuissimus (Mert. & Koch) Haynes & C.B. Hellquist)
- All About Potamogeton Berchtoldii Fieber
- All About Potamogeton Amplexicaulis Kar.
- All About Potamogeton Bupleuroides Fern.
- All About Potamogeton Perfoliatus L. Ssp. Bupleuroides (Fern.) Hultén
- All About Potamogeton Perfoliatus L. Var. Bupleuroides (Fern.) Farw.
- All About Whitestem Pondweed
- All About Potamogeton Praelongus Wulfen Var. Angustifolius Graebn.
- All About Spotted Pondweed
- All About Small Pondweed
- All About Potamogeton Gemmiparus (J.W. Robbins) J.W. Robbins Ex Morong
- All About Claspingleaf Pondweed
- All About Potamogeton Heterophyllus Schreb.
- All About Potamogeton Lucens Auct. Non L. [misapplied]
- All About Floating Pondweed
- All About Longleaf Pondweed
- All About Potamogeton Americanus Cham. & Schlecht.
- All About Potamogeton Fluitans Roth
- All About Oakes' Pondweed
- All About Bluntleaf Pondweed
- All About Potamogeton Gramineus L. Var. Graminifolius Fries
- All About Potamogeton Gramineus L. Var. Maximus Morong
- All About Potamogeton Gramineus L. Var. Myriophyllus J.W. Robbins
- All About Potamogeton Gramineus L. Var. Typicus Ogden
- All About Potamogeton ×hagstroemii Benn. (pro Sp.) [gramineus × Richardsonii]
- All About Hill's Pondweed
- All About Potamogeton Porteri Fern.
- All About Illinois Pondweed
- All About Potamogeton Angustifolius Bercht. & K. Presl
- All About Potamogeton Foliosus Raf. Var. Fibrillosus (Fern.) Haynes & Reveal
- All About Leafy Pondweed (Potamogeton Foliosus Raf. Ssp. Foliosus)
- All About Potamogeton Curtissii Morong
- All About Potamogeton Foliosus Raf. Var. Genuinus Fern.
- All About Potamogeton Foliosus Raf. Var. Macellus Fern.
- All About Leafy Pondweed (Potamogeton Foliosus Raf.)
- All About Potamogeton Foliosus Raf. Var. Foliosus Raf. [superfluous Autonym]
- All About Fries' Pondweed
- All About Variableleaf Pondweed
- All About Potamogeton Diversifolius Raf. Var. Multidenticulatus (Morong) Aschers. & Graebn.
- All About Ribbonleaf Pondweed
- All About Potamogeton Epihydrus Raf. Ssp. Nuttallii (Cham. & Schlecht.) Calder & Taylor
- All About Potamogeton Epihydrus Raf. Var. Nuttallii (Cham. & Schlecht.) Fern.
- All About Potamogeton Epihydrus Raf. Var. Ramosus (Peck) House
- All About Florida Pondweed
- All About Leafy Pondweed
- All About Potamogeton Fibrillosus Fern.
- All About Largeleaf Pondweed
- All About Potamogeton ×argutulus Hagstr. [gramineus × Nodosus]
- All About Snailseed Pondweed
- All About Potamogeton Diversifolius Raf. Var. Trichophyllus Morong
- All About Tuckerman's Pondweed
- All About Curly Pondweed
- All About Waterthread Pondweed
- All About Potamogeton Capillaceus Poir. P.p.
- All About Potamogeton Capillaceus Poir. Var. Atripes Fern.
- All About Portulaca Lanceolata Engelm.
- All About Portulaca Umbraticola Kunth Ssp. Lanceolata (Engelm.) Matthews & Ketron
- All About Wingpod Purslane (Portulaca Umbraticola Kunth)
- All About Hairy Purslane
- All About Portulaca Hawaiiensis O. Deg.
- All About Pondweed
- All About Alpine Pondweed
- All About Potamogeton Alpinus Balbis Ssp. Tenuifolius (Raf.) Hultén
- All About Potamogeton Alpinus Balbis Var. Subellipticus (Fern.) Ogden
- All About Potamogeton Alpinus Balbis Var. Tenuifolius (Raf.) Ogden
- All About Kiss Me Quick
- All About Portulaca Cyanosperma Engl.
- All About Portulaca Mundula I.M. Johnston
- All About Redstem Purslane
- All About Portulaca Phaeosperma Urban
- All About 'ihi Makole
- All About Small's Purslane
- All About Shrubby Purslane
- All About Wingpod Purslane (Portulaca Umbraticola Kunth Ssp. Umbraticola)
- All About Little Hogweed
- All About Portulaca Neglecta Mackenzie & Bush
- All About Portulaca Oleracea L. Ssp. Granulatostellulata (Poelln.) Danin & Baker
- All About Portulaca Oleracea L. Ssp. Impolita Danin & Baker
- All About Portulaca Oleracea L. Ssp. Nicaraguensis Danin & Baker
- All About Portulaca Oleracea L. Ssp. Nitida Danin & Baker
- All About Portulaca Oleracea L. Ssp. Papillatostellulata Danin & Baker
- All About Portulaca Oleracea L. Ssp. Stellata Danin & Baker
- All About Portulaca Retusa Engelm.
- All About Porterella
- All About Fleshy Porterella
- All About Purslane
- All About Paraguayan Purslane
- All About Rose Moss
- All About Silkcotton Purslane
- All About Portulaca Parvula Gray
- All About Native Yellow Purslane
- All About 'ihi
- All About Porophyllum Nodosum M.E. Jones
- All About Porophyllum Putidum A. Nels.
- All About Porophyllum Vaseyi Greene
- All About Yerba Porosa
- All About Kleinia Glandulosa Moc. & Sessé
- All About Porophyllum Latifolium Benth.
- All About Porophyllum Macrocephalum DC.
- All About Porophyllum Ruderale (Jacq.) Cass. Var. Macrocephalum (DC.) Cronq.
- All About Yerba Porosa (Porophyllum Ruderale (Jacq.) Cass.)
- All About Populus Tremuloides Michx. Var. Intermedia Victorin
- All About Populus Tremuloides Michx. Var. Magnifica Victorin
- All About Populus Tremuloides Michx. Var. Rhomboidea Victorin
- All About Populus Tremuloides Michx. Var. Vancouveriana (Trel.) Sarg.
- All About Populus Vancouveriana Trel.
- All About Poreleaf
- All About Slender Poreleaf
- All About Porophyllum Caesium Greene
- All About Porophyllum Junciforme Greene
- All About Populus ×smithii Boivin [grandidentata × Tremuloides]
- All About Populus ×barnesii W.H. Wagner
- All About Quaking Aspen
- All About Populus Aurea Tidestrom
- All About Populus Cercidiphylla Britt.
- All About Populus ×polygonifolia Bernard
- All About Populus Tremula L. Ssp. Tremuloides (Michx.) A.& D. Löve
- All About Populus Tremuloides Michx. Var. Aurea (Tidestrom) Daniels
- All About Populus Tremuloides Michx. Var. Cercidiphylla (Britt.) Sudworth
- All About Populus ×dutillyi Lepage
- All About Populus ×generosa Henry
- All About Populus ×gileadensis Rouleau
- All About Populus Manitobensis Dode
- All About Lombardy Poplar
- All About Populus Dilatata Ait.
- All About Populus Italica (Du Roi) Moench
- All About Populus Nigra L. Var. Italica Du Roi
- All About Populus ×parryi Sarg. [balsamifera × Fremontii]
- All About Bigtooth Aspen
- All About Populus Grandidentata Michx. Var. Angustata Victorin
- All About Populus Grandidentata Michx. Var. Meridionalis Tidestrom
- All About Populus Grandidentata Michx. Var. Subcordata Victorin
- All About Swamp Cottonwood
- All About Populus Argentea Michx. F.
- All About Balm-of-Gilead
- All About Populus ×andrewsii Sarg.
- All About Populus ×bernardii Boivin
- All About Populus Arizonica Sarg. Var. Jonesii Sarg.
- All About Populus Canadensis Moench Var. Fremontii (S. Wats.) Kuntze
- All About Populus Fremontii S. Wats. Var. Arizonica (Sarg.) Jepson
- All About Populus Fremontii S. Wats. Var. Macdougalii (Rose) Jepson
- All About Populus Fremontii S. Wats. Var. Macrodisca Sarg.
- All About Populus Fremontii S. Wats. Var. Pubescens Sarg.
- All About Populus Fremontii S. Wats. Var. Thornberi Sarg.
- All About Populus Fremontii S. Wats. Var. Toumeyi Sarg.
- All About Populus Macdougalii Rose
- All About Fremont Cottonwood (Populus Fremontii S. Wats.)
- All About Populus Sargentii Dode Var. Texana (Sarg.) Correll
- All About Populus Texana Sarg.
- All About Rio Grande Cottonwood
- All About Populus Deltoides Bartr. Ex Marsh. Var. Wislizeni (S. Wats.) Dorn
- All About Populus Fremontii S. Wats. Var. Wislizeni S. Wats.
- All About Populus Wislizeni (S. Wats.) Sarg.
- All About Eastern Cottonwood (Populus Deltoides Bartr. Ex Marsh.)
- All About Fremont Cottonwood
- All About Populus Arizonica Sarg.
- All About Populus Virginiana Foug.
- All About Populus Virginiana Foug. Var. Pilosa (Sarg.) F.C. Gates
- All About Plains Cottonwood
- All About Monilistus Monilifera (Ait.) Raf. Ex B.D. Jackson
- All About Populus Besseyana Dode
- All About Populus Deltoides Bartr. Ex Marsh. Var. Occidentalis Rydb.
- All About Populus Monilifera Ait.
- All About Populus Occidentalis (Rydb.) Britt. Ex Rydb.
- All About Populus Sargentii Dode
- All About Populus Balsamifera L. Var. Pilosa Sarg.
- All About Populus Balsamifera L. Var. Virginiana (Foug.) Sarg.
- All About Populus Canadensis Moench Var. Virginiana (Foug.) Fiori
- All About Populus Deltoides Bartr. Ex Marsh. Var. Angulata (Ait.) Sarg.
- All About Populus Deltoides Bartr. Ex Marsh. Var. Missouriensis (A. Henry) A. Henry
- All About Populus Deltoides Bartr. Ex Marsh. Var. Pilosa (Sarg.) Sudworth
- All About Populus Deltoides Bartr. Ex Marsh. Var. Virginiana (Foug.) Sudworth
- All About Populus Nigra L. Var. Virginiana (Foug.) Castigl.
- All About Populus Palmeri Sarg.
- All About Populus ×eugenei Simon-Louis
- All About Populus Euramericana Guinier
- All About Populus ×robusta C. K. Schneid.
- All About Gray Poplar
- All About Populus Alba L. Var. Canescens Ait.
- All About Populus Hybrida Bieb.
- All About Eastern Cottonwood
- All About Populus Angulata Ait.
- All About Populus Angulata Ait. Var. Missouriensis A. Henry
- All About Populus Balsamifera L. Var. Missouriensis (A. Henry) Rehd.
- All About Populus Trichocarpa Torr. & Gray Ex Hook.
- All About Populus Trichocarpa Torr. & Gray Ex Hook. Ssp. Hastata (Dode) Dode P.p.
- All About Populus Trichocarpa Torr. & Gray Ex Hook. Var. Cupulata S. Wats.
- All About Populus Trichocarpa Torr. & Gray Ex Hook. Var. Hastata (Dode) A. Henry P.p.
- All About Populus Trichocarpa Torr. & Gray Ex Hook. Var. Ingrata (Jepson) Jepson
- All About Balsam Poplar (Populus Balsamifera L.)
- All About Carolina Poplar
- All About Populus Canadensis Moench Var. Eugenei (Simon-Louis) Schelle
- All About Populus Canadensis Moench Var. Serotina (T. Hartig) Rehd.
- All About Populus Candicans Ait.
- All About Populus Michauxii Dode
- All About Populus Tacamahaca P. Mill.
- All About Populus Tacamahaca P. Mill. Var. Candicans (Ait.) Stout
- All About Populus Tacamahaca P. Mill. Var. Lanceolata (Marsh.) Farw.
- All About Populus Tacamahaca P. Mill. Var. Michauxii (Dode) Farw.
- All About Black Cottonwood
- All About Populus Balsamifera L. Var. Californica S. Wats.
- All About Populus Hastata Dode P.p.
- All About Populus Salicifolia Raf.
- All About Populus ×sennii Boivin
- All About Populus Tweedyi Britt.
- All About Balsam Poplar
- All About Populus Balsamifera L. Var. Candicans (Ait.) Gray
- All About Populus Balsamifera L. Var. Fernaldiana Rouleau
- All About Populus Balsamifera L. Var. Lanceolata Marsh.
- All About Populus Balsamifera L. Var. Michauxii (Dode) A. Henry
- All About Populus Balsamifera L. Var. Subcordata Hyl.
- All About Populus Acuminata Rydb. Var. Rehderi Sarg.
- All About White Poplar