oleraceus - oh-ler-ray-see-us: of the
vegetable garden or the kitchen.
oliganthus - ol-ig-anth-us: few-flowered.
oligocarpus - ol-ig-oh-karp-us: few-
fruited.
oligospermus - ol-ig-oh-sperm-us: few-
seeded.
olivaceus - ol-iv-vay-see-us: olive-like
or -colored.
olivaeformis - ol-iv-ee-form-iss: olive-
shaped.
olympicus - ol-limp-ik-us: of (Mt.)
Olympus (Greece).
opacus - oh-pay-kus: pale (clouded,
shaded).
oppositiflorus - op-pos-it-if-floh-rus:
opposite-flowered.
oppositifolius - op-pos-it-if-foh-lee-us:
opposite-leaved.
orbicularis - orb-ik-yew-lay -riss:
round.
orbiculatus-orb-ik-yew-lay-tus: round.
orchideus - or-kid-ee-us: orchid-like.
orchioides - or-kee-oy-deez: orchid-
like.
oreganus-or-eg-gay-nus: of Oregon.
orientalis - or-ee-en-tay-liss: of the
Orient (eastern world).
origanif olius - or-ig-an-if-foh-lee-us:
with marjoram-like leaves.
origanoides - or-ig-an-noy-deez: mar-
joram-like.
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ornatissimus - or-nat-tiss-im-us: very
showy.
ornatus - or-nay-tus: showy, orna-
mental.
ornithocephalus - or-nith-oh-sef-al-us:
like a bird's head.
ornithopodus - or-nith-opp-od-us: like a
bird's foot.
ornithorhynchus - or-nith-or-rink-us:
beak-like.
orthochilus - orth-oh-kye-lus: straight-
lipped.
orthopterus - orth-opt-er-us: straight-
winged.
ovalif olius-oh-val-if-foh-lee-us: oval-
leaved.
ovalis-oh-vay-liss: oval.
ovatifolius-oh-vat-if-foh-lee-us: ovate-
leaved.
ovatus - oh-vay-tus: of egg shape or egg-
shaped pattern, with broad end
downward or inward (ovate).
oviferus - oh-vif-er-us: bearing ovules
(unfertilized seed).
ovigerus - oh-vij-er-us: ovule-bearing.
ovinus - oh-vye-nus: pertaining to
sheep, woolly, used as sheep fodder.
oxyacanthus-ox-ee-ak-anth-us: sharp-
thorned or -spined.
oxygonus - ox-ig-goh-nus: sharp-
angled.
oxyphyllus-ox-if-fil-us: sharp-leaved.
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pachyanthus - pak-ee-anth-us: thick-
veined.
pachyneurus - pak-ee-new-rus: thick-
veined.
pachypterus - pak-kip-ter-us: thick-
winged.
pacincus - pas-sif-ik-us: of the Pacific
Ocean (regions).
palaestinus - pal-ee-stye-nus: of Pal-
estine.
pallens-pal-ens: pale.
pallescens - pal-less-sens: fading, be-
coming pale.
palliatus-pal-ee-ay-tus: cloaked.
pallidiflorus - pal-id-if-floh-rus: pale-
flowered.
pallidifolius-pal-id-if-foh-lee-us: pale-
leaved.
pallidus -pal-id-us: pale.
palliflavens - pal-if-flay-vens: pale-
yellow.
palmatifidus - pal-mat-tif-id-us: pal-
mately cut (like fingers).
palmatus - pal-may-tus: divided or
lobed (like hand and fingers: palmate).
palmifolius - pal-mif-foh-lee-us: with
hand-like leaves.
paludosus - pal-yew-doh-sus: marsh-
loving.
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palustris-pal-lust-riss: marsh-loving.
panduratus - pan-dew-ray-tus: fiddle-
shaped.
paniculatus - pan-ik-yew-lay-tus: having
a type of flower cluster classified as a
panicle.
paniculigerus - pan-ik-yew-lij-er-us:
having panicles.
pannosus - pan-noh-sus: ragged, tattered-
looking.
papilionaceus - pap-il-ee-on-nay-see-
us: with butterfly-like flowers.
papillosus - pap-il-loh-sus: with tiny
nipple-like protuberances.
papyraceus - pap-ihr-ray-see-us: papery.
papyriferus - pap-ihr-rif-er-us: having
paper-like part or parts.
paradoxus - par-ad-dox-us: strange,
contrary to type.
parasiticus - par-ass-sit-ik-us: parasitical.
pardalinus - par-dal-lye-nus: leopard-
spotted.
pardinus - par-dye-nus: leopard-spotted.
partitas - par-tye-tus: divided, separated.
parviflorus - par-vif-floh-rus: small-
flowered.
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