Forbs and Subshrubs
Plagiobothrys collinus
Cooper's popcornflower
Plagiobothrys pringlei
Pringle's popcornflower
Plantago argyrea
saltmeadow plantain
Plantago lanceolata
narrowleaf plantain
Plantago major
common plantain
Plantago ovata
desert Indianwheat
Plantago patagonica
woolly plantain
Plantago rhodosperma
redseed plantain
Plantago wrightiana
Wright's plantain
Platystemon californicus
cream cup
Plectritis ciliosa
longspur seablush
Polanisia dodecandra
roughseed clammyweed
Polanisia dodecandra ssp. trachysperma
redwhisker clammyweed
Polygala alba
white milkwort
Polygala barbeyana
blue milkwort
Polygala obscura
velvetseed milkwort
Polygala rusbyi
Rusby's milkwort
Polygala scoparioides
broom milkwort
Polygonum amphibium
water knotweed
Polygonum aviculare
prostrate knotweed
Polygonum convolvulus
black bindweed
Polygonum douglasii
Douglas' knotweed
Polygonum lapathifolium
curlytop knotweed
Polygonum pensylvanicum
Pennsylvania smartweed
Polygonum persicaria
spotted ladysthumb
Polygonum punctatum
dotted smartweed
Polygonum ramosissimum
bushy knotweed
Portulaca halimoides
silkcotton purslane
Portulaca oleracea
little hogweed
Portulaca pilosa
kiss me quick
Portulaca suffrutescens
shrubby purslane
Portulaca umbraticola
wingpod purslane
Potamogeton crispus
curly pondweed
Potamogeton foliosus
leafy pondweed
Potamogeton gramineus
variableleaf pondweed
Potamogeton illinoensis
Illinois pondweed
Potamogeton natans
floating pondweed
Potamogeton nodosus
longleaf pondweed
Potentilla rivalis
brook cinquefoil
Potentilla thurberi
scarlet cinquefoil
Proboscidea parviflora
doubleclaw
Pseudocymopterus montanus
alpine false springparsley
Pseudognaphalium canescens
Wright's cudweed
Pseudognaphalium macounii
Macoun's cudweed
Psilactis asteroides
New Mexico tansyaster
Psilostrophe cooperi
whitestem paperflower
Psilostrophe sparsiflora
greenstem paperflower
Psoralidium tenuiflorum
slimflower scurfpea
Pterostegia drymarioides
woodland pterostegia
Rafinesquia californica
California plumeseed
Rafinesquia neomexicana
New Mexico plumeseed
Ranunculus aquatilis
white water crowfoot
Ranunculus cymbalaria
alkali buttercup
Ranunculus pensylvanicus
Pennsylvania buttercup
Ratibida columnifera
upright prairie coneflower
Rhynchosia senna
Texas snoutbean
Rhynchosida physocalyx
buffpetal
Ricinus communis
castorbean
Rorippa microtitis
Chihuahuan yellowcress
Rudbeckia laciniata
cutleaf coneflower
Rumex acetosella
common sheep sorrel
Rumex crispus
curly dock
Rumex hymenosepalus
canaigre dock
Rumex obtusifolius
bitter dock
Rumex salicifolius
willow dock
Sagina saginoides
arctic pearlwort
Sairocarpus nuttallianus
violet snapdragon
Salsola tragus
prickly Russian thistle
Salvia aethiopis
Mediterranean sage, African Sage
Salvia columbariae
chia
Salvia reflexa
lanceleaf sage
Salvia subincisa
sawtooth sage
Samolus valerandi
seaside brookweed
Sanvitalia abertii
Abert's creeping zinnia
Saponaria officinalis
bouncingbet
Schkuhria multiflora
manyflower false threadleaf
Schoenocrambe linearifloria
slimleaf plainsmustard
Scrophularia parviflora
pineland figwort
Scutellaria lateriflora
blue skullcap
Scutellaria potosina ssp. platyphylla
Mexican skullcap
Sedum cockerellii
Cockerll's stonecrop
Senecio arizonicus
Arizona ragwort
Senecio eremophilus
desert ragwort
Senecio flaccidus var. flaccidus
threadleaf ragwort
Senecio lemmonii
Lemmon's ragwort
Senecio spartioides
broom-like ragwort
Senecio wootonii
Wooton's ragwort
Senna bauhinioides
twinleaf senna
Senna covesii
Coues' cassia
Sicyos ampelophyllus
streamside bur cucumber
Sida abutifolia
spreading fanpetals
Sidalcea neomexicana
salt spring checkerbloom
Silene antirrhina
sleepy catchfly
Silene scouleri
simple campion
Sisymbrium altissimum
tall tumblemustard
Sisymbrium irio
London rocket
Sisyrinchium demissum
stiff blue-eyed grass
Solanum americanum
American black nightshade
Solanum douglasii
greenspot nightshade
Solanum elaeagnifolium
silverleaf nightshade