33° THE NURSERY LIST. 



Typha (Bullrush, Cat-Tail, Reed Mace). Typhacece. 



Propagation may be effected by seeds sown in a pot 

 plunged in water nearly to the level of the soil ; or by 

 division. 



Ulex (Furze, Gorse, Whin). Leguminoscs. 

 Propagated by seeds or by cuttings. 



Ulmus (Elm). Urticacea. 



Usually propagated by seeds. The seeds of most elms 

 germinate the year they mature (they ripen in spring), and 

 they may be sown at once. The slippery elm {U. fulva), 

 however, generally germinates the following year, and the 

 seeds should be stratified. Layers are sometimes made, 

 and suckers may be taken. The varieties are grafted on 

 common stocks. 



Umbrella-plant. See Cyperus. 

 Unicorn Plant. See Martynia. 

 Uvularia, including Oakesia (Bellwort). Liliacea. 

 Seeds ; usually by division. 



Vaccinium (Swamp Huckleberry, Whortleberry, Blueberry, 

 Billberry, Cranberry). Ericacece. 

 Seeds, layers, root cuttings, and divisions of' the old 

 plants. Some species by hard-wood cuttings, for which 

 see Cranberry. Huckleberry seeds are small, and some- 

 what difficult to grow. The seeds should be washed from 

 the fruits and stored in sand in a cool place until late in 

 winter. They are then sown in pans or flats on the sur- 

 face of a soil made of equal parts sand and loam. Cover 

 with fine sphagnum and keep in a cool house or frame, 

 always keeping the seeds moist. Seeds treated in this 

 way may be expected to germinate in a month or two, 

 although they may lie dormant a year. Transplant fre- 

 quently and keep shaded until large enough to shift for 

 themselves. Layers should be tongued. Cuttings, 2 or 

 3 inches long, of the best roots, made in fall and placed in 

 mild bottom heat in early spring, often give fair satisfac- 

 tion. Native plants can be obtained from the woods and 

 fields which will give good satisfaction if small specimens 

 are taken. Gaylussacias are handled in the same way as 

 vacciniums. 



Valeriana (Valerian). Valerianacea. 

 Seeds and divisions. 



