DENDR OBIUM. 



97 



the Australian kinds generally. It is best to let them have their way and not to try and 

 force them to rest or into growth, but when they seem inclined to do either, encourage 

 them with more heat and moisture, or vice versa. 



All Dendrobiums are apt to be attacked by insects, and especially thrips and red 

 spider. The instructions given for the destruction of these pests at p. 65 should be 

 carefully followed. Hybrids in this genus are now very numerous, and comprise some 

 lovely plants, the best known of which are noted below. Only those that are useful 

 decorative species or varieties are mentioned, botanical curiosities being not of general 

 interest. 



Eepeesentative Species and Varieties. 



Dendrobixtm aggregatuji. — A pretty, dwarf -growing 

 evergreen form, thriving on a rough block of 

 wood or in small pans of peat and moss ; the flowers 

 are of two shades of yellow. Burmah, 1834 (h). 



D. Ainsworthi. — A lovely hybrid, between D. nobile 

 and D. aureum, with white 

 sepals and petals, and a 

 flaked blotch on the lip of 

 crimson-purple. D. Ains- 

 worthi roseum is a variety 

 with rose-coloured flowers. 

 Habit as in D. nobile ; 

 culture similar (h). 



D. albo-sanguineum. — Stems 

 rather short ; flowers 

 creamy-white, with blood- 

 red markings on the seg- 

 ments. Moulmein, 1851 (h.) 



D. amjendm. — Stems pendant, 

 about 2 feet in length ; 

 flowers whitish, each seg- 

 ment tipped with purple. 

 Nepal, 1874 (/i). 



D. Apollo grandiflora. — Hy- 

 brid from nobile, pulcher- 

 rinium and splendidissi- 



mum. This is superb. Sepals and petals waxy- 

 white, shading to rosy-purple ; the lip is white, 

 with a deep violet-crimson centre (h). (Fig. 50.) 



D. aureum. -Not a showy kind, but remarkable as the 

 parent of some of the very finest hybrids ; flowers 

 yellow, with a purple blotch on the lip ; fragrant. 

 Assam, 1837 {h), 



D. Bensonle. — A neat deciduous species, with white 

 flowers ; the lip blotched with maroon and yel- 

 low. Burmah, 1866 (h). 



D. bigibbum. — Stems 18 inches high; flowers on 



VOL. III. 



terminal racemes magenta-purple. A very beau- 

 tiful species. Austraba, 1824 (/<). 

 Boxalli. — Attractive, and a supposed natural 

 hybrid between D. Devonianum and D. crystal- 

 linum. Moulmein, 1873 (h). 



Fig. 50. Dendeobiusi Apollo gkandiflora. 



D. Brymerianum. — A remarkable and beautiful 



species, with golden-yellow flowers ; the lip very 



deeply fringed. Burmah, 1874 (/<)■ 

 D. chlorostele. — Hybrid between D. Linawianuin 



and D. "Wardianum. Flowers more like the latter 



species. 



D. chrysaxthum. — A very handsome species, flower- 

 ing on the unripened stems. Flowers golden - 

 yellow, with maroon blotches. Suitable for 

 baskets. Burmah, 1828 (i). 



D. chrysotoxum. — Evergreen species, with golden- 



