I actually don’t know of many floral/flower-related genders, but as for pronouns, @pronoun-provider has a list of them!
These include, but are lilely not limited to:
ama/amara/amaran/amaranth/amaranself
bloom/blooms/bloomself (plantkin-exclusive)
bo/bel/oss/bloss/blossomself or blosself
ca/cam/mel/mellia/camelliaself or camellself
ca/car/carna/carnati/carnationself
co/lum/bi/bine/columbineself or columself
dai/daisy/dais/dais/daisyself
do/dog/gwo/gwod/dogwoodself
flo/flor/flori/florid/floridself
flow/flower/flowers/flowerself
frie/friez/freesi/freesi/freesiaself
fu/fuch/uch/uchia/fuchsiaself
ha/hib/bis/cus/hibiscuself
haw/hawth/thor/thorn/hawthornself or hawthself
hy/cin/hyas/hyacin/hyacinthself or hyaself
ja/min/jas/jasmi/jasmineself
je/min/jes/jessa/jessamineself
lau/rel/aur/laur/laurelself or laurself
lav/lav/lavs/lavs/lavself (lavender)
lav/laven/lavend/lavends/lavendself (lavender)
lil/lily/lils/lilies/lilself/lilyself
lo/lot/lotu/lotus/lotuself
ma/mag/nol/nolia/magnoliaself or noliaself
nar/narc/narcir/narcirs/narcself (soft c as in certain, narcissus)
pe/peony/peo/peon/peonyself
pe/per/peri/peri/periself or periwinkle
rho/rhod/rhode/rhodes/rhodeself
rie/orch/id/chid/orchidself, orchiself, or orchself
ro/ros/rose/roses/roseself
sy/syr/rin/ringa/syringaself
to/mis/misel/miselt/mistletoeself
tul/tulip/tulips/tulips/tulipself
vi/viol/viols/viols/violself (violet)
wi/win/winkle/winkle/winkleself or periwinkle
wi/wist/wis/wister/wisteriaself, wistself, or wisterself
zi/zin/zin/zinni/zinniaself
