This is a list based on all plants observed in Rhodes & Chalki by:
https://www.flora-germanica.de/en/flora-of-rhodos/species-list
Need to add later:
Ophrys cretica beloniae
Ophrys tenthredinifera leochroma
Ophrys tenthredinifera korae
Ophrys fusca attaviria
Ophrys fusca eptapigiensis
Ophrys fusca lindia
Ophrys fusca sancti-isidorii
Ophrys fusca parvula
Ophrys fusca persephonae (added as Ophrys fusca fusca)
Ophrys omegaifera apollonae
Ophrys sitiaca
Ophrys holosericea oreas (added as Ophrys fuciflora)
Ophrys holosericea saliarisii
Ophrys holosericea halia
Ophrys holosericea colossaea
Ophrys heldreichii scolopaxoides (added as Ophrys heldreichii)
Ophrys heldreichii pseudoapulica
Ophrys oestrifera chalkae (added as Ophrys oestrifera)
Anacamptis papilionacea ssp. messenica (added as Anacamptis papilionacea)
Anacamptis papilionacea thaliae
Anacamptis x kallithea (added as Anacamptis fragrans)
Limodorum abortivum rubrum
Iris x albicans
Crocus rhodensis
Gladiolus anatolicus
Allium archeotrichon
Allium bourgeaui bourgeaui
Allium pallens pallens
Allium rhodiacum (maybe synonym of Allium Chalkii)
Allium sipyleum (maybe not correct)
Allium sphaerocephalon trachyphus
Allium stamineum stamineum (maybe extinct from Rhodes)
Sternbergia lutea lutea
Ornithogalum brachystylum
Ornithogalum pannonicum
Scirpoides holoschoenus australis
Schoenoplectus litoralis litoralis
Carex illegitima
Festuca jeanpertii jeanpertii (maybe extinct from Rhodes)
Cutandia stenostachya
Avena barbata barbata
Helictochloa agropyroides
Anthoxanthum gracile
Alopecurus utriculatus anthoxanthoides
Phleum crypsoides crypsoides
Phleum exaratum aegaeum
Phleum exaratum exaratum
Phleum subulatum ciliatum
Phleum subulatum subulatum
Bromus alopecuros caroli-henrici
Papaver argemone nigrotinctum
Nigella arvensis brevifolia
Delphinium arenarium
Adonis microcarpa cretica
Frankenia hirsuta brevipes
Limonium virgatum virgatum
Polygonum longipes
Bufonia ophiolithica
Dianthus elegans (doubtful)
Dianthus fruticosus rhodius
Silene echinospermoides
Silene gemmata
Silene tunicoides
Beta adanensis
Atriplex prostrata prostrata
Noaea mucronata mucronata
Caroxylon aegaeum
Geranium tuberosum tuberosum
Salix fragilis
Euphorbia chamaesyce chamaesyce
Euphorbia exigua exigua
Andrachne telephioides ssp. telephioides
Quercus infectoria infectoria
Cercis siliquastrum siliquastrum
Hymenocarpos circinnatus
Lotus preslii
Astragalus austroaegaeus
Astragalus epiglottis epiglottis
Astragalus gilvus
Pisum sativum biflorum
Trigonella cariensis
Medicago blancheana
Aphanes floribunda
Prunus x rhodia
Rhamnus lycioides graeca
Rhamnus pichleri
Tuberaria lipopetala
Capparis orientalis x zoharyi
Microthlaspi natolicum gaillardotii
Microthlaspi perfoliatum perfoliatum
Alyssum pogonocarpum
Erysimum rhodium
Stopped at: Primulaceae s. lat.