1O2 Encyclopaedia of Gardening 



and when a small insect alights the leaf closes over it. It should 

 be grown in a greenhouse, in a compost of peat and Sphagnum moss. 

 As it loves moisture the pot may be stood in a saucer of water. The 

 white flowers are borne in July. Propagation is by seeds or division. 

 A coloured plate appears in the Botanical Magazine, t. 785. 



Diplacus (dip-lacus. Ord. Scrophularineae) . One species is 

 grown a good deal, and that is glutinosus, which botanists now call 

 Mimulus glutinosus. It is a greenhouse shrub, with small orange 

 flowers and sticky foliage. Loam, with a fourth of leaf mould and 

 some sand, suits it. Propagation is by cuttings under a bell-glass 

 in summer. 



Dipladenia (diplade-nia, from diploos, double, and aden, gland; 

 there are two glands in the ovary. Ord. Apocynaceae) . Very 

 beautiful evergreen twiners, producing abundance of large, brilliant 

 flowers in a warm greenhouse. They are sometimes trained up 

 pillars, but more frequently on balloon-shaped trellises fixed in 

 large pots; when the frame-work is well covered and the plants are 

 in full bloom the former make lovely objects. Peat and loam, the 

 former preponderating, with sand, suit them. Repotting is best 

 done in spring, when growth begins. When in full growth they 

 will delight in large quantities of water, but after flowering the 

 supply may be reduced. A moist atmosphere should be maintained 

 by syringing. Propagation is by cuttings of the young shoots in 

 spring. They ought to be put in a propagating case, or in bottom 

 heat with a bell-glass over them. Amabilis, rose; boliviensis, 

 yellow and white (Botanical Magazine, t. 5783); and splendens, 

 carmine (Bot. Mag., t. 3976), are three of the best kinds. 



Disa (di-sa, a native name. Ord. Orchidaceae) . A small genus 

 of Orchids, not much grown except in the case of grandiflora, which 

 is a great favourite, partly because of its brilliant colour, and 

 partly because it will thrive in a cool house. It should be grown 

 in pots, liberally crocked, and filled with a mixture of fibrous peat 

 and Sphagnum moss; a little charcoal may be added for sweeten- 

 ing. Early winter is the period for repotting. Little water will be 

 needed until the plants are seen to be rooting freely, when regular 

 and abundant supplies must be given; at the end of the growing 

 season the supply must be reduced and the plants rested. Propa- 

 gation is by division when repotting. There are varieties of grandi- 

 flora, and superba is very good. 



Disbudding. A term applied to the thinning out of growths or 

 flower buds, in the former case to prevent too much wood, in the 

 latter to get fewer but finer flowers. See Fruit, Carnations, etc. 



Dittany. See Dictamnus. 



Dodecatheon, American Cowslip (dodeca-theon, a name given by 

 Pliny. Ord. Primulaceae) . These pretty flowers thrive in sandy 

 peat in cool, shady spots on the rockery or in the border. Propaga- 

 tion is by division or seeds in spring. There are many forms of 

 D. Meadia. Giganteum is one of the best. 



Dog Rose, Rosa canina. 



