ULMUS 73 



5-7 cm. wide, petioles hairy, 3-5 cm. long; flower bracts oblong, 6-8 

 cm. long, 1-2 cm. wide; clusters 6-12-flowered, flowers 7-8 mm. wide, 

 without a scale at base ; fruit ovoid, hairy, with 5 prominent angles ; 

 e u r o p a e a, European. 



Rarely cultivated, native of Europe. 



Ulmaceae Elm Family 



Trees with alternate, simple, serrate leaves ; flowers monoecious, rarely 

 perfect, clustered or rarely single ; sepals 3-9, petals 0, stamens 3-9, Ovary 

 t-celled, stigmas 2; fruit a winged achene (samara), nut, or drupe. 



A family of about 13 genera found throughout temperate and tropical 

 regions. 



KEY TO THE GENERA 



1 . Fruits winged, in clusters ; bark with flattened 



ridges Uliniis 



2. Fruits berry-like, single, persistent; bark with 



deep corky ridges Celt is. 



Ulmus L i n n e 1753 Elm 

 (L. u 1 m u s, elm, the two words cognate) 



Trees ; leaves alternate in two rows, simple, serrate, the mid-rib 

 giving rise to many regular veins ; flowers monoecious or perfect, in 

 clusters, on last year's twigs, appearing before the leaves ; sepals 4-9, 

 united, petals lacking, ovary 1 -celled, styles 2; fruit a round or oval 

 samara, broadly winged. 



Propagation: species grown from seed which should be sown as they 

 fall; varieties by budding and grafting; seeds of the red elm are kept 

 stratified until the following spring. 



A genus of 16 species, natives of the northern hemisphere; 5 native 

 species are found in the United States. 



Key to the Species 



1 . Bud scales densely brown-hairy ; leaves very 



rough above ; samaras smooth, U. fulva 



2. Bud-scales smooth ; leaves nearly smooth 



above; samaras ciliate at edge 

 a. Some twigs with corky lines ; sides of fruit 



hairy ; flowers in racemes U. raccmosa 



