Ephedra foliata
-

Senna alata
-

Avicennia marina
-

Blepharis ciliaris
-

Pseuderanthemum carruthersii
Grows only in parks as planted bushes.

Ruellia prostrata
Grows on lawns as a weed.

Ruellia simplex
Ornamental plant.

Aizoon hispanicum
-

Aizoon canariense
Was almost absent in spring and summer of 2015, probably because of dry weather.

Mesembryanthemum cryptanthum
-

Mesembryanthemum nodiflorum
-

Sesuvium verrucosum
Some plants may be S. portulacastrum that is very similar. Grows only as an ornamental plant. Near Olympic Tower in West Bay, it grows on waste ground semi-wild from shoots cut from trimmed plants.

Trianthema portulacastrum
It was seen only in Irkaya.

Zaleya pentandra
-

Aerva javanica
-

Agriophyllum minus
-

Alternanthera pungens
Only found in Irkaya, where it often forms dense carpet in fall.

Amaranthus albus
-

Amaranthus caudatus
Difficult to distinguish it from A. viridis and A. hybridus.

Amaranthus graecizans
-

Amaranthus hybridus
Difficult to distinguish it from A. viridis and A. caudatus.

Amaranthus viridis
Difficult to distinguish it from A. hybridus and A. caudatus.

Anabasis setifera
-

Arthrocnemum macrostachyum
Some pictures may show Salicornia europaea instead of this plant.

Atriplex leucoclada
Subsp. turcomanica was seen only in Irkaya.

Beta vulgaris
-

Bienertia cycloptera
This form of B. is more succulent, has clustered fruits, and grows in sand relatively far from water. Could be the same species as B. sinuspersici.

Bienertia sinuspersici
This form of B. grows on beaches few meters from water line and has relatively small leaves. It has prostrate shape. Could be the only species of B.

Chenopodium album
-

Chenopodium murale
-

Cornulaca aucheri
-

Cornulaca monacantha
-

Digera muricata
-

Dysphania ambrosioides
Mostly grows in Irkaya, but in one instance it was found on roadside of Salwa Highway.

Gomphrena globosa
Ornamental plant.

Halocnemum strobilaceum
-

Halopeplis perfoliata
-

Haloxylon persicum
-

Haloxylon salicornicum
-

Salicornia europaea
-

Salsola collina
-

Salsola cyclophylla
-

Salsola drummondii
Young plants may have clavate leaves. Later, leaves become pear-shaped.

Salsola imbricata
-

Salsola soda
According to a recent publication, it should be called Suaeda iranshahrii var. arabica.

Salsola vermiculata
This name is taken from AB book, but J. N. calls it S. villosa.

Seidlitzia rosmarinus
-

Suaeda aegyptiaca
-

Suaeda maritima
-

Suaeda vermiculata
-

Traganum nudatum
Grows in sand at foot of sandstone hills and on slopes of the hills.

Mangifera indica
-

Polyalthia longifolia
-

Anethum graveolens
Difficult to distinguish it from Foeniculum vulgare.

Apium graveolens
Probably grown from a discarded celery root.

Bupleurum semicompositum
Was recognized on a picture showing flowers of Helianthemum.

Coriandrum sativum
-

Daucus carota
It may be something different.

Foeniculum vulgare
In comparison with Anethum graveolens, it is larger and has many stalks.

Calotropis procera
Found only in Doha and in one place in desert west from Al-Ghuwayriyah (north-western Qatar).

Carissa macrocarpa
-

Thevetia peruviana
-

Catharanthus roseus
-

Glossonema varians
-

Leptadenia pyrotechnica
-

Nerium oleander
-

Plumeria alba
-

Plumeria obtusa
-

Aaronsohnia factorovskyi
Could be either A. factorovskyi or Tripleurospermum auriculatum (J. N.).

Atractylis carduus
-

Bidens pilosa
Found only in Irkaya, in central area of the circles.

Brachyglottis greyi
Self-sown plants occur in gardens of Qatar University.

Calendula arvensis
-

Centaurea sinaica
-

Cichorium pumilum
-

Thymophylla tenuiloba
Sometimes grows self-sown on sidewalks.

Eclipta prostrata
-

Erigeron bonariensis
-

Filago desertorum
Plants found near Ziziphus bushes in Al Mardiya - Wasit area look similar to Filago prolifera from AB book.

Flaveria trinervia
Found only in Irkaya.

Gaillardia pulchella
Ornamental plant.

Gnaphalium pensylvanicum
-

Gymnarrhena micrantha
-

Helianthus annuus
-

Ifloga spicata
In AB book, picture of this plant was placed under the name Agriophyllum minus.

Jacobaea maritima
-

Koelpinia linearis
-

Lactuca serriola
-

Launaea capitata
-

Launaea intybacea
It may be Lactuca saligna.

Launaea mucronata
-

Launaea nudicaulis
-

Matricaria aurea
Was grown under Ziziphus bushes in many places in spring of 2016.

Pallenis hierochuntica
-

Vicoa pentanema
-

Picris cyanocarpa
May be other species of Picris.

Picris radicata
May be other species of Picris.

Pluchea dioscoridis
-

Pulicaria gnaphalodes
-

Pulicaria guestii
In AB book, named as P. sicula.

Pulicaria undulata
-

Reichardia intermedia
May be a different species.

Reichardia tingitana
Sometimes grows tall in deep shade, with small flowers.

Rhanterium epapposum
-

Senecio glaucus
-

Sonchus oleraceus
-

Sphagneticola trilobata
-

Tagetes erecta
-

Urospermum picroides
-

Verbesina encelioides
-

Zinnia angustifolia
-

Millingtonia hortensis
-

Spathodea campanulata
-

Tabebuia rosea
-

Tecoma stans
-

Anchusa hispida
One small plant looks like Lappula spinocarpos.

Arnebia hispidissima
Difficult to distinguish it from Arnebia decumbens.

Cordia sebestena
-

Echiochilon jugatum
It may be E. persicum.

Ehretia microphylla
-

Heliotropium bacciferum
Difficult to distinguish it from H. ramosissimum.

Heliotropium curassavicum
-

Moltkiopsis ciliata
-

Ogastemma pusillum
-

Anastatica hierochuntica
-

Brassica napus
Difficult to distinguish it from B. rapa.

Brassica oleracea
-

Brassica rapa
Difficult to distinguish it from B. napus.

Brassica tournefortii
-

Cardamine hirsuta
-

Eremobium aegyptiacum
-

Eruca vesicaria
-

Erucaria hispanica
-

Farsetia heliophila
-

Horwoodia dicksoniae
-

Lepidium aucheri
-

Lepidium bonariense
It may be a different species of Lepidium.

Lepidium didymum
Grows only on lawns in Doha.

Lepidium sativum
-

Lobularia maritima
-

Raphanus sativus
-

Savignya parviflora
-

Sinapis arvensis
-

Sisymbrium erysimoides
-

Sisymbrium irio
-

Zilla spinosa
-

Echinocactus grusonii
Ornamental plant.

Opuntia ficus-indica
-

Lobelia erinus
-

Capparis spinosa
-

Carica papaya
-

Herniaria hemistemon
-

Herniaria hirsuta
-

Paronychia arabica
-

Polycarpaea repens
-

Polycarpaea robbairea
-

Polycarpaea spicata
-

Polycarpon succulentum
May be the same as P. tetraphyllum.

Polycarpon tetraphyllum
-

Pteranthus dichotomus
-

Sclerocephalus arabicus
-

Silene arabica
-

Silene villosa
-

Spergula fallax
-

Spergularia bocconei
-

Spergularia diandra
-

Casuarina equisetifolia
May be C. cunninghamiana.

Helianthemum kahiricum
-

Helianthemum ledifolium
-

Helianthemum lippii
-

Cleome amblyocarpa
-

Cleome noeana
Was completely absent in fall of 2015 because of dry weather.

Dipterygium glaucum
-

Quisqualis indica
-

Conocarpus lancifolius
-

Terminalia catappa
-

Convolvulus arvensis
-

Convolvulus cephalopodus
-

Convolvulus fatmensis
-

Convolvulus glomeratus
-

Convolvulus pilosellifolius
-

Convolvulus prostratus
-

Cressa cretica
-

Cuscuta chinensis
-

Cuscuta pedicellata
-

Ipomoea batatas
-

Ipomoea cairica
-

Ipomoea carnea
-

Ipomoea pes-caprae
-

Jacquemontia pentanthos
-

Merremia dissecta
-

Merremia tridentata
-

Citrullus colocynthis
-

Cucumis prophetarum
-

Lagenaria siceraria
-

Luffa cylindrica
Some of pictures may show different species.

Momordica charantia
-

Trichosanthes cucumerina
-

Cynomorium coccineum
-

Portulacaria afra
-

Rajania cordata
-

Acalypha variegata
-

Acalypha wilkesiana
Ornamental plant in parks. Some of plants may be A. variegata that has more green leaves.

Chrozophora tinctoria
-

Euphorbia granulata
-

Euphorbia heterophylla
-

Euphorbia hirta
-

Euphorbia hypericifolia
Some of plants look like Euphorbia arabica.

Euphorbia milii
-

Euphorbia peplus
-

Euphorbia prostrata
-

Euphorbia retusa
-

Euphorbia tirucalli
-

Jatropha gossypiifolia
-

Jatropha integerrima
-

Ricinus communis
-

Acacia ehrenbergiana
-

Acacia stenophylla
Grows only in the city.

Acacia tortilis
-

Albizia lebbeck
-

Alhagi maurorum
-

Astragalus annularis
-

Astragalus corrugatus
-

Astragalus eremophilus
Most pictures probably show Astragalus hauarensis instead of A. eremophilus.

Astragalus sieberi
-

Astragalus tribuloides
-

Bauhinia variegata
-

Caesalpinia pulcherrima
-

Calliandra haematocephala
-

Cassia fistula
-

Cassia javanica
-

Ceratonia siliqua
-

Cicer arietinum
-

Clitoria ternatea
-

Psoralea plicata
-

Delonix regia
-

Erythrina variegata
-

Hippocrepis bicontorta
-

Hippocrepis constricta
-

Hippocrepis multisiliquosa
-

Indigofera intricata
-

Lathyrus aphaca
-

Leucaena leucocephala
-

Lotononis platycarpa
-

Lotus garcinii
Found on limestone cliffs in Fuwairit. In Maszhabiya near Abu Samra it was seen in scattered locations in April of 2016 as seedlings, but they disappear in May.

Lotus glinoides
-

Lotus halophilus
-

Medicago laciniata
-

Medicago lupulina
-

Medicago sativa
-

Trigonella monantha
-

Melilotus albus
-

Melilotus indicus
-

Ononis reclinata
-

Ononis sicula
-

Parkinsonia aculeata
-

Pithecellobium dulce
-

Prosopis cineraria
-

Prosopis farcta
-

Prosopis juliflora
-

Rhynchosia minima
-

Senna artemisioides
-

Senna italica
-

Senna occidentalis
-

Senna surattensis
-

Tamarindus indica
-

Taverniera spartea
-

Trifolium repens
-

Trigonella foenum-graecum
-

Trigonella glabra
-

Trigonella stellata
-

Vachellia nilotica
-

Vicia monantha
-

Vigna radiata
-

Vigna unguiculata
-

Frankenia pulverulenta
-

Erodium cicutarium
-

Erodium glaucophyllum
-

Erodium laciniatum
Some of plants may be E. oxyrrhynchum or E. neuradifolium.

Erodium oxyrrhynchum
It may be Erodium laciniatum.

Geranium mascatense
-

Monsonia heliotropioides
-

Monsonia nivea
-

Scaevola sericea
-

Mentha piperita
-

Ocimum basilicum
-

Plectranthus pentheri
-

Salvia aegyptiaca
-

Stachys arvensis
-

Teucrium polium
-

Vitex agnus-castus
-

Vitex trifolia
-

Volkameria inermis
-

Linum usitatissimum
-

Lagerstroemia speciosa
-

Lawsonia inermis
-

Punica granatum
-

Abutilon pannosum
It was previously called Abutilon figarianum.

Abutilon fruticosum
-

Adansonia gregorii
Imported tree planted in Aspire Park.

Bombax ceiba
-

Ceiba speciosa
Imported ornamental trees. Many trees die several years after their planting in parks of Qatar.

Corchorus depressus
Opened flowers were seen only once.

Corchorus olitorius
-

Corchorus trilocularis
-

Gossypium herbaceum
Usually grows on hedges.

Hibiscus rosa-sinensis
-

Hibiscus tilliaceus
-

Hibiscus trionum
-

Althaea ludwigii
-

Malva parviflora
-

Malvaviscus arboreus
-

Sida spinosa
-

Azadirachta indica
-

Melia azedarach
-

Cocculus pendulus
-

Ficus altissima
-

Ficus benghalensis
-

Ficus carica
-

Ficus religiosa
-

Morus alba
-

Moringa oleifera
-

Muntingia calabura
-

Callistemon viminalis
-

Eucalyptus camaldulensis
-

Eucalyptus deglupta
-

Neurada procumbens
-

Boerhavia erecta
Mostly seen as a prostrate form with narrow leaves. It could be B. diffusa.

Bougainvillea glabra
-

Jasminum grandiflorum
-

Jasminum multiflorum
-

Jasminum sambac
-

Nyctanthes arbor-tristis
-

Olea europaea
-

Oenothera speciosa
-

Cistanche tubulosa
-

Oxalis corniculata
-

Fumaria parviflora
Probably was introduced by seeds in garden soil.

Andrachne telephioides
-

Phyllanthus niruri
-

Antirrhinum majus
-

Linaria albifrons
In 2016, the place on roadside where it grows was bulldozed for road extension, only a small island of land remained.

Misopates orontium
-

Plantago amplexicaulis
-

Plantago boissieri
-

Plantago ciliata
-

Plantago coronopus
-

Plantago lanceolata
-

Plantago ovata
-

Russelia equisetiformis
-

Limonium axillare
-

Polygala erioptera
-

Emex spinosa
-

Polygonum argyrocoleon
-

Rumex crispus
-

Rumex dentatus
-

Rumex vesicarius
-

Portulaca grandiflora
-

Portulaca oleracea
-

Portulaca quadrifida
-

Anagallis arvensis
-

Ochradenus aucheri
-

Ochradenus baccatus
-

Oligomeris linifolia
-

Reseda muricata
-

Ziziphus mauritiana
-

Ziziphus nummularia
-

Ziziphus spina-christi
-

Galium tricornutum
-

Ixora coccinea
-

Oldenlandia corymbosa
-

Citrus aurantiifolia
-

Haplophyllum tuberculatum
-

Murraya paniculata
-

Zanthoxylum myriacanthum
-

Salvadora persica
-

Dodonaea viscosa
-

Manilkara zapota
-

Leucophyllum frutescens
-

Scrophularia deserti
-

Datura innoxia
-

Lycium shawii
-

Nicandra physalodes
-

Physalis angulata
-

Solanum elaeagnifolium
-

Solanum luteum
-

Solanum lycopersicum
-

Solanum melongena
-

Solanum nigrum
-

Solanum tuberosum
-

Withania somnifera
-

Tamarix aphylla
-

Tamarix aucheriana
-

Tamarix nilotica
-

Tamarix passerinoides
-

Typha domingensis
-

Parietaria alsinifolia
-

Lantana camara
-

Stachytarpheta jamaicensis
-

Viola tricolor
-

Balanites aegyptiaca
-

Fagonia bruguieri
-

Fagonia glutinosa
-

Fagonia indica
-

Fagonia ovalifolia
-

Fagonia tenuifolia
-

Seetzenia lanata
-

Zygophyllum qatarense
-

Zygophyllum simplex
-

Tribulus macropterus
-

Tribulus pentandrus
-

Tribulus terrestris
-

Phoenix dactylifera
-

Washingtonia filifera
-

Commelina benghalensis
-

Tradescantia pallida
-

Tradescantia spathacea
-

Halodule uninervis
-

Bolboschoenus glaucus
May be Bolboschoenus maritimus according to enature.qa.

Cyperus alternifolius
-

Cyperus conglomeratus
-

Cyperus laevigatus
-

Cyperus rotundus
-

Halophila ovalis
-

Halophila stipulacea
-

Najas marina
-

Juncus rigidus
-

Agave americana
Likely to be a different species, A. angustifolia or Agave sisalana

Dipcadi erythraeum
-

Aeluropus lagopoides
-

Aeluropus littoralis
Likely to be the same as Aeluropus lagopoides.

Avena sterilis
-

Urochloa decumbens
-

Brachypodium distachyon
-

Cenchrus ciliaris
-

Cenchrus setigerus
-

Centropodia forsskalii
-

Centropodia fragilis
-

Chloris gayana
It may be the same as Eleusine indica.

Chloris virgata
-

Chrysopogon plumulosus
-

Cutandia memphitica
-

Cymbopogon commutatus
-

Cynodon dactylon
-

Dactyloctenium aegyptium
-

Dactyloctenium aristatum
-

Dichanthium annulatum
-

Dichanthium foveolatum
-

Digitaria bicornis
May be the same as Chloris virgata.

Digitaria sanguinalis
-

Echinochloa colona
-

Eleusine indica
May be the same as Chloris gayana.

Eragrostis barrelieri
-

Eragrostis cilianensis
-

Eragrostis pilosa
-

Eremochloa ophiuroides
-

Halopyrum mucronatum
-

Hordeum murinum
-

Hordeum vulgare
-

Lasiurus scindicus
-

Leptochloa fusca
-

Lolium rigidum
Seen only in Irkaya.

Ochthochloa compressa
-

Panicum antidotale
-

Panicum coloratum
Found only in Irkaya.

Panicum turgidum
-

Paspalum dilatatum
-

Pennisetum divisum
-

Pennisetum setaceum
-

Phalaris minor
-

Phalaris paradoxa
-

Phragmites australis
-

Poa annua
-

Polypogon monspeliensis
-

Rostraria pumila
-

Schismus arabicus
-

Schismus barbatus
-

Setaria sphacelata
-

Setaria verticillata
-

Sorghum bicolor
-

Sorghum halepense
-

Sorghum sudanense
-

Sporobolus ioclados
-

Sporobolus spicatus
-

Stipa capensis
-

Stipagrostis obtusa
-

Stipagrostis plumosa
-

Zea mays
-

Zoysia tenuifolia
-

Ruppia maritima
-

Asphodelus tenuifolius
-