Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

plant; tree, shrub, bush; creeper; herb, herbage; grass. annual; perennial, biennial, triennial; exotic. timber, forest; wood, woodlands; timberland; hurst†, frith†, holt, weald†, park, chase, greenwood, brake, grove, copse, coppice, bocage†, tope, clump of trees, thicket, spinet, spinney; underwood, brushwood; scrub; boscage, bosk†, ceja [Sp.], chaparal, motte [U.S.]; arboretum &c 371. bush, jungle, prairie; heath, heather; fern, bracken; furze, gorse, whin; grass, turf; pasture, pasturage; turbary†; sedge, rush, weed; fungus, mushroom, toadstool; lichen, moss, conferva†, mold; growth; alfalfa, alfilaria†, banyan; blow, blowth†; floret†, petiole; pin grass, timothy, yam, yew, zinnia. foliage, branch, bough, ramage†, stem, tigella†; spray &c 51; leaf. flower, blossom, bine†; flowering plant; timber tree, fruit tree; pulse, legume. Adj. vegetable, vegetal, vegetive†, vegitous†; herbaceous, herbal; botanic†; sylvan, silvan†; arborary†, arboreous†, arborescent†, arborical†; woody, grassy; verdant, verdurous; floral, mossy; lignous†, ligneous; wooden, leguminous; vosky†, cespitose†, turf-like, turfy; endogenous, exogenous. Phr. green-robed senators of mighty woods [Keats]; this is the forest primeval [Longfellow].