228 THE NURSERY-MANUAL 



Althaea (Marsh-Mallow. Hollyhock). Malvaceae. 



Increased by seeds, and by division. The biennial species 

 should be raised from seeds every year. See Hollyhock. 



Alyssum. Cruciferoe. 



Increased by seeds (particularly sweet alyssum and other annuals) 

 sown in the open border or in pans of sandy soil. Also propagated 

 by division and layers and by cuttings of young shoots. The 

 common sweet alyssum (A. maritimum) is hardy and seeds may 

 be sown early where the plants are to grow ; seedlings also trans- 

 plant readily. Sweet alyssum is known also under the names 

 Koniga and Lobularia. 



Amaranthus (Amaranth). Amaranthaceoe. 



Readily grown from seeds, which may be sown in the open where 

 the plants are to stand and the seedlings thinned, or started under 

 glass and the plants transplanted. 



Amaryllidaceae. Amaryllids. 



Nearly all the plants of this family are bulbous and are readily 

 increased by offsets, suckers, or seeds. The bulbs naturally make 

 other bulbs or give rise to separable parts that are easily usable 

 for propagation. Most of the common amaryllids (as amaryllis, 

 hippeastrum, lycoris, sprekelia, brunsvigia, crinum, pancratium, 

 hymenocallis) are summer or autumn bloomers and make their 

 growth after the flowers are passed. In cold climates the bulbs are 

 lifted in autumn after well ripened or all the possible growth is 

 made, and stored on a greenhouse bench or in a light cool pit with 

 some of the earth adhering. The remaining leaves will then 

 naturally mature, and the bulbs may be kept cool and dormant 

 until spring, at which time they are potted or planted in the open 

 for blooming. Each bulb should make two to four or more offsets 

 if the growth is vigorous. In removing these offsets, see that they 

 have developed sufficient roots to support them. 



The amaryllids may be propagated by seeds, which should be 

 sown as soon as ripe, covered lightly with fine soil and kept from 

 drying out. When leaves have developed, put in pots and keep 

 them growing. Good blooming plants should be obtained in one 

 to three years. 



Amelanchier (Shad-bush. Juneberry. Service-berry). Rosacece. 



Propagated by seeds sown soon after ripening, or stratified and 



sown in spring ; also increased by suckers, layers and cuttings in 



