VINES, HARDY AND TENDER 373 



not unlike those of a single Zinnia; the color is intense scarlet. Like 

 other greenhouse vines of this family (Compositae), such as the 

 Mutisia, the weak growths will not produce flowers, consequently 

 the plants should be encouraged to make robust growth, expecially 

 during the late Winter months, to flower in April and May. When 

 planted out in Summer the vines make very rapid headway, but the 

 flower display is meagre. For the Southern States and Cahfornia 

 it may turn out to be a very desirable vine. With us it seems to 

 thrive best in a rather cool house. 



HOYA (Wax Plant). H. carnosa is the most popular of the 

 genus. It has large umbels of flesh colored flowers. It is a popular 

 house plant with many. There is a beautifully variegated form. In 

 Summer the plants may be plunged in the full sun out of doors. 

 An intermediate house and only a moderate supply of water will 

 suit them in Winter. 



Propagation. For cuttings take good sized pieces, pot and 

 plunge in Tarisk bottom heat. The young plants should, if started 

 early, be given a rather high temperature. 



HUMULUS (Hop). In the warmer parts of the country, H. 

 japonicus var. variegatus is a hardy annual, and one of the most 

 handsome of those having variegated leaves. To have an early 

 growth, the seeds should be sown about the beginning of March 

 and the seedlings potted off singly when large enough. Green leaves 

 preponderate on the seedlings, gradually becoming better colored 

 as the plants increase in height. 



IPOMCEA (Morning Glory. Moonflower). The Japanese 

 Morning Glories vary much in the color of the flowers, and while 

 some of them are undoubtedly pretty there are numerous shades 

 which will never become popular. Few sorts approach in beauty 

 the well known I. Learii or the kind known as /. ruhro-ccerulea. 

 The first named is evidently a perennial without tubers, and it is 

 propagated from cuttings; the last named, from seed. The tuberous- 

 rooted kinds need only to be treated like Cannas or Dahlias during 

 the Winter. In Summer few climbers can equal them in perpetual 

 masses of bloom. Ipomxa digitata {paniculata) is probably the 

 best of the lot. Other good ones are /. hederacea {scabra), I. Har- 

 dingii, I. HorsfallicB and /. insignis. The two last named are nearly 

 alike, but /. insignis is the better for Summer bloom. I. macrorhiza 

 {Michauxii), a native of the Southern States, makes an excellent 

 outdoor vine if started early in the greenhouse. Under cultivation 

 the large flowering variety of the native /. pandurata makes a 



