THE NURSERY-LIST 341 



Jasminum (Jasmine. Jessamine). Oleacece. 



Propagated readily by cuttings of nearly mature wood under 

 glass in summer ; also by ripe-wood cuttings taken in autumn, by 

 layers, and sometimes by seeds sown as soon as ripe. 



Jatropha. Euphorbiaceoe. 



Readily raised from seeds. Propagated also by cuttings from 

 firm young wood struck in sand over bottom heat; the cuttings 

 should be dried somewhat before setting, as the plants have milky 

 juice. 



Jubaea (Coquito Palm of Chile). Palmaceae. 



Propagation is by seeds, started in a warm house and kept moist. 

 See Palms, page 377. 



Juglans (Walnut and Butternut). Juglandaceas. 



All the species are readily propagated by means of stratified 

 nuts. Do not allow the nuts to become dry. Artificial cracking 

 should not be practiced. In stiff soils the seedlings are likely to 

 produce a long tap-root which renders transplanting difficult after 

 the first year or two. The tap-root may be cut by a long knife 

 while the tree is growing, or the young seedling may be transplanted. 

 Particular varieties are perpetuated by grafting or budding with 

 any of the common methods ; but the skill of the grafter is more 

 important than the method. In the North, they are sometimes 

 worked indoors in pots. Common shield-budding works well, if 

 the sap is flowing freely in the stock. Flute-budding is often 

 employed. The improved native sorts are root-grafted in winter. 

 Old trees can be top-grafted like apple trees (see page 151). If 

 nursery stocks are grafted, it is usually best to insert the cions 

 below ground, as for grapes. In all walnut grafting, it is generally 

 preferred that only one scarf or cut of the cion should traverse the 

 pith. It is important that the cions be kept perfectly dormant. 



The " English " walnut (J. regia) is mostly grown direct from 

 seed in this country, and the different varieties usually come true. 

 In California, the native walnut (J. Hindsii and J. californica) is 

 often used as a stock for this species, and flute-budding on branches 

 a half-inch or more in diameter is often practiced. Twig- or prong- 

 budding (Fig. 146) is sometimes employed. See Walnut. 



