UPNetwork -> Pokédex -> Generation 3 -> Breeding Groups

Plant Group

019 - Lotad - Grass/Water

020 - Lombre - Grass/Water

021 - Lodicolo - Grass/Water

022 - Seedot - Grass

023 - Nuzleaf - Grass/Dark

024 - Shiftry - Grass/Dark

034 - Shroomish - Grass

035 - Breloom - Grass/Fighting

088 - Oddish - Grass/Poison

089 - Gloom - Grass/Poison

090 - Vileplume - Grass/Poison

091 - Bellossom - Grass

094 - Roselia - Grass/Poison

119 - Cacnea - Grass

120 - Cacturne - Grass/Dark

150 - Tropius - Grass/Flying

203 - Bulbasaur - Grass/Poison

204 - Ivysaur - Grass/Poison

205 - Venusaur - Grass/Poison

235 - Paras - Bug/Grass

236 - Parasect - Bug/Grass

250 - Bellsprout - Grass/Poison

251 - Weepinbell - Grass/Poison

252 - Victreebel - Grass/Poison

270 - Exeggcute - Grass/Psychic

271 - Exeggutor - Grass/Psychic

278 - Tangela - Grass

307 - Chikorita - Grass

308 - Bayleef - Grass

309 - Meganium - Grass

332 - Hoppip - Grass/Flying

333 - Skiploom - Grass/Flying

334 - Jumpluff - Grass/Flying

336 - Sunkern - Grass

337 - Sunflora - Grass