76 Commercial Gardening 



Nycterinia (or Zaluzianskia). The best -known kinds are capensis, 

 with narrow leaves and spikes of whitish flowers, and selaginoides, having 

 white flowers with an orange centre. Both kinds are South African 

 annuals, and are raised from seeds sown in heat in spring. N. lychnidea 

 is a tender hairy perennial 6-12 in. high, with spikes of yellowish- white 

 flowers in summer. 



(Enothera. A large genus, best known perhaps from the " Evening 

 Primrose" (OS. biennis), a North American biennial, 2-4 ft. high, with 

 beautiful sweet - scented primrose - yellow flowers. The variety La- 

 marckiana or grandiflora is superior to the type. (E. Drummondi, 

 with grey - green wavy leaves and pale - yellow or white flowers, and 

 (E. crassicaulis, 1-1 \ ft. high, with pure - white flowers, are both 

 biennials, easily raised from seeds. (E. taraxacifolia is another fine 

 biennial from Chili, with long trailing shoots and white flowers with 

 long tubes. (E. amcena or Lindleyia}so known as Godetia rubicunda 

 is a fine annual 1-2 ft. high, having rose with a crimson spot on each 

 petal. There are several fine varieties of it. (E. bistorta has yellow 

 flowers with deep - red spots at the base. There is an improved dwari 

 form called Veitchiana. (E. triloba (or rhizocarpa) is another yellow 

 flowered annual. There are several others closely related to and con 

 fused with the Godetias (which see). 



PERENNIALS. Among -the best perennial species of (Enothera the 

 following are grown for sale: fruticosa, 2-3 ft., yellow, with a fine 

 deep - coloured form called Youngi, and a semi - double one; eximio 

 (ccespitosa), 9-12 in., white; glauca and Fraseri, 2 ft., rich yellow, 

 glabra, with crimson - tinted stems and leaves and yellow flowers: 

 Howardi, trailing, with yellow flowers, changing to rich orange scarlet 

 in hot situations; missouriensis (macrocarpa), trailing, with yello\\ 

 flowers, 4-5 in. across; speciosa, 2-3 ft., white, with one or two fine 

 varieties. 



Omphalodes verna. A pretty rock plant, 6 in. high, with trailing 

 stems and deep-blue Forget-me-not-like flowers from March to May. The 

 variety alba has white flowers, and later. It likes sandy loam, arid is 

 raised from seeds and by division. 



Onosma echioides (tauricum). A charming Caucasian perennial about 

 1 ft. high, with tufts of hairy lance-shaped leaves, and clusters of drooping 

 golden-yellow flowers (fig. 229). Other kinds are albo-roseum, white; 

 bracteosum, white; pyramidale. scarlet; and stellulatum, white or pale 

 yellow. All kinds are propagated by cuttings of the basal shoots inserted 

 in sandy peat in spring, and also by seeds. 



Orchids, Hardy. The development of open-air gardening has brought 

 about a trade in many kinds of hardy terrestrial orchids, most of which 

 are grown for sale in pots, and are used for the decoration of nooks in 

 the rock garden or by the boggy banks of pools of water, being mostly 

 grown in leaf mould or peat and sphagnum moss. The following kinds 

 are in commerce: Aplectrum hyemale, a one -leaved orchid with rich- 



