xiv Preface 



Cross-fertilization >The pollen of one flower coming 

 into contact with the stigma of another. 



Creeping A stem running along the ground and root- 

 ing at intervals. 



Deciduous 'Falling off; not evergreen. 



Dentate Toothed. 



Disc Flowers Tubular florets found in the centers 

 of composite flowers. 



Entire Smooth-edged; no teeth or divisions. 



Evergreen Having green leaves at all times. 



Fertile Capable of producing fruit. 



Fertilization The quickening of the seed in the flow- 

 er ovaries by pollen from the anthers. 



Filament. The thread-like part of a stamen. 



Floret A small tubular flower, usually one of a 

 cluster. 



Glabrous Smooth; not rough or hairy. 



Glaucus Covered wtih a whitish bloom. 



Hirsute Covered wtih rather coarse hairs. 



Imperfect Flowers with either stamens or pistil 

 wanting. 



Introduced Brought intentionally from other re- 

 gions. 



Involucre A cup-shaped cluster of bracts surround- 

 ing a head or flower cluster. 



Irregular With parts unequal in size or shape. 



Lanceolate or lance-shaped Much longer than wide; 

 pointed at the end and tapering at the base. 



Leaflet A single division of a compound leaf. 



Linear Long, narrow, with parallel margins. 

 .Lip Either division of a two-parted corolla; the 



broadened petal of an orchid. 



Lobe A rounded division of a flower or leaf. 



Midrib The central vein of a leaf. 



Naturalized Floral immigrants that have become 

 firmly established. 



Nerve A single, unbranched vein or rib. 



