well, i think plant tycoon plants are really beautyful, and since i'm a botanist i thought to write a list of th game's plants associating them to real plants and flowers. this may be useless but in my opinion it's a fun thing.
i'm not english, i'm italian, so forgive me if i make some grammar mistakes or don't know the english name of the pants (i will use the latin one).
FOLIAGE:
reptans = ivy (Hedera helix)
scandens = Hypoestes phyllostachia
grass = there are a lot of species similar to Grass, expecially te Graminaceae family
orchid = Paphiopedilum orchid
astera = -> grass
gladiatus = sansevieria fasciata
fern = fern (Nephrolepis exaltata)
ananas = Agave (various species) and Ananas Comosus
maranta = Dieffembachia species
fanleaf = Hedychium species
lemonbush = Rosa species
bamboo = Acer dissectum (red leaves)
maple = a tree (there are too much types of trees that looks like a maple)
rare oak = Quercus robur (the red leaves hybrid)
pipe cactus = Carnegiea gigantea
pear cactus = Opuntia species (not the thin ones)
ball cactus = mammillaria or Echinocactus grusonii
glaber = Zantedeschia or Arum
tigerfern = Vriesea splendens
pitcher = sarracenia stevensii (carnivorous plant)
weeper = Nolina species or various palms
multiflora = Rosa (dark foliage)
ridgeball = Uebelmannia

FLOWERS:
spotted = primerose (Primula vulgaris)
painted = flowes of many Mammillaria cactus or aster novae-angeliae
daisy = daisy (Bellis perennis or Chrysanthemum leucanthemum)
nox = black Cattleya orchid
bluestar = Gentiana verna or blue species of Sysirynchium
mystic = purple hybrids of Epicactus or Epiphyllum or Seleliocerus
rosaceae = a double rose (hybrid of Rosa tea)
viola = Viola tricolor or wittrochiana
jalapa = a simple rose (Rosa canina) or a Clematis hybrid
fabled = a hybrid of double rose (Rosa blue baccara)
fragrant = Hibiscus rosa-sinensis (an orange hybrid)
blazing = sunflower (Helianthus annuus)
fourpetal = a pink flower of the Cruciferae family
aureus = Acacia armata
venomous = berries of Vaccinum myrtillus
mela = apples (Malus domestica golden)
citrus = lemons (Citrus limon)
arthurium = red Anthurium flowers (with N not R = aNthurium)
venus = a white Cattleya or a Coelogyne orchid
tahitian = Cereus species
lilia = orange Epicactus or Epiphyllum
baccatus = berries of Ruscus
tilia = green apples or young ball flowers of Allium species

i hope you like my post and if you find plants that i forgot and that are more similar to the virtual species than the ones i posted, please advise me!