DELPHINIUM 



24. cheilanthum, Fischer. Stem erect, simple or 

 branched, 2-3 ft.: Ivs. glabrous or slightly pubescent, 

 5-parted, the lobes pointed, sub-trifld~ and somewhat 

 toothed: fls. dark blue, the upper petals sometimes pale 

 yellow, the lower ones inflexed, ovate, entire ; spur 

 rather long, straight or somewhat curved : follicles 3, 

 either glabrous or pubescent ; seeds 3-cornered, 3- 

 winged, not scaly. June, July. Siberia. B.R. 6:473. 

 Gt. 13:253. P.M. 16:258 (as D.'magnificum). 



DDD. Seeds scaly. 



25. formdsum, Boiss. & Hult. Fig. 688. Stem strong, 

 2-3 ft., hairy below, rather glabrous above : lower Ivs. 

 5-7-parted, long-petioled ; upper ones 3-5-parted, short- 

 petioled or sessile, all alternate : racemes many-fld. : 

 fls. blue, with indigo margins; spur long, violet, bifid at 

 the tip: follicles 3, pubescent ; seeds scaly. June, July. 

 Asia Minor perhaps, but its origin is disputed. F.S. 

 12:1185. Vick'sMag. 2305. R.H. 1859, p. 528. -The most 

 permanent form for naturalizing. 



26. Maackianum, Regel. Erect, 3 ft. high, pubescent 

 or glabrous, branched above : Ivs. pubescent on both 

 sides, base often truncate or reniform, 3-5-parted, the 

 parts serrate ; petioles dilated at the base : peduncles 

 yellow-hairy, with the bracts often inserted above the 

 base: fls. in loose panicles, sepals blue, % as long as the 

 spurs; petals dark violet: follicles often glabrous, % in. 

 long; seeds small, distinctly scaly. 



July. Siberia. Gt. 344. 



27. hybridum, Steph. Stem 3-4 

 ft., pubescent above : root some- 

 what bulbous : Ivs. 5-many- 

 parted ; lobes linear ; petioles di- 

 lated and sheathing at the base : 

 racemes dense: fls. blue, lower limbs 

 white-bearded ; spur straight, 

 longer than the sepals : follicles 3, 

 hairy ; seeds ovate, with transverse 

 scales. June- Aug. Mountains of 

 Asia. R.H. 1893, p. 258 ; same cut 

 in S.H. 2:282. There are many 

 double and semi-double vars. of 

 this type. 



Var. Barlowi, Paxt. Very large, 

 semi-double fls., deep blue, with 

 brownish center. A supposed hy- 

 brid with D. grandiflorum. B. R. 

 23:1944. Int. 1892. 



D. ccerulescens, Freyn. A fine Asiatic 

 species, with single and double forms. 

 P.M. 16:258. D. Whetlerii is listed in 

 the trade, but is of unknown origin. 

 K. C. DAVIS. 



DEMAZEBIA (Desmazeria) . 

 Graminece. Annuals or peren- 

 nials, with narrow, involute leaf- 

 blades : spikelets peculiarly dis- 

 tichous on two sides of a 3-sided 

 rachis, many-fld., sessile, or some 

 of the lower spikelets pedicellate. 689 ' Dema a Sicula. 

 Four species known. Mediterra- (X 3J 



nean and S. African. 



sicula, Dum. (Brizopyrum Siculum, Link.). SPIKE 

 GRASS. Fig. 689. A smooth, erect annual, 8 in. to 1 ft. 

 high: Ivs. few: panicle spike-like, 2-3 in. long ; spike- 

 lets ovate to linear, 8-20-fld. Mediterranean. Fre- 

 quently used for edging. P> B< KENNEDY. 



DEMEBABA ALMOND. Consult Terminalia. 



DENDBOBIIJM (tree and life: they are epiphytes). 

 Orchid&ceve, tribe Epid6ndrece. A genus containing many 

 species of great horticultural merit. Flowers racemose, 

 fasciculate or solitary ; perianth usually spreading; 

 labellum articulate or connate with the base of the 

 column; column short, semiterete; base produced con- 

 spicuously ; pollinia 4 : stems cane-like, in some species 

 deciduous, so that during the resting season the plants 

 appear like a group of dried sticks. The species (more 

 than 300) are distributed through the tropical countries 

 of the eastern hemisphere, Australia, Japan, China, 

 India and the Philippine Islands furnishing a large 



DENDROBIUM 



467 



number. They are particularly abundant in parts of 

 India. No species are known in Africa. The term 

 pseudobulbs has been used throughout this article for 

 the sake of uniformity, but these members are very 

 variable in the genus, ranging from very large (several 

 feet long) to very small and thin. The flowers are of 

 many sizes, forms and colors. Some of the species re- 

 semble Epidendrums, Cattleyas, and other genera. 



OAKES AMES. 



The growing of most of the commercial Dendrobiums 

 can generally be understood and accomplished in observ- 

 ing three steps: (1) The season of rain, that produces 

 the abundance of growth. (2) The season of colder 

 temperature, to ripen the wood. (3) The dry season, pro- 

 ducing the flowers. 



In the selection of varieties, there are very few that 

 will not respond to the treatment suggested by this 

 scheme. D. thrysiflorum, fimbriatum, chrysotoxum, 

 Farmerii, and all varieties of this group, respond most 

 generously to this treatment in the warm glasshouse. 

 There are no plants more beautiful in the orchid family. 



The soil required is equal parts of clean peat and 

 moss. Fix the plants very firmly in pots or baskets. 

 While growing, an abundance of water must be given, 

 with syringing on all fine days. When the growth is 

 well made and developed, then comes the season of rest, 

 and water can be withheld gradually, until finally none 

 is given. Commercially speaking, Dendrobiums can be 

 flowered in any ordinary glasshouse, and with only 

 partial shade. Another method is to give more shade at 

 the growing season, and more air at the resting period. 



The propagation of these species is by division of 

 the growths, .either in the resting season or the starting 

 of the growing season. Pruning is not to be practiced, 

 as, being of slow growth, they require the leaves for the 

 furnishing of the plant. Shading should be adopted. 

 With all Dendrobiums, care should be taken not to over- 

 pot. Grow in small pots or baskets, so as to confine the 

 roots. D. Dearei may be grown continuously, with- 

 out rest. 



The commoner conservatory Dendrobiums, as D. 

 Phalcenopsis , D. Ainsworthii, etc., are propagated by- 

 lay ing the stems flat on baskets, attaching them firmly 

 by means of wire. Pruning of these varieties was once 

 practiced extensively, but when there is plenty of 

 growth the stem and flowers can be cut at the same 

 time; this adds more beauty to the flower. D. nobile 

 and D. Wardianum are easy to grow, only care should, 

 be taken not to be too severe on all classes of this sec- 

 tion, after the growth is made, until midwinter. They 

 bloom best when the late autumn sun partially ripens; 

 the stems. See Orchids. COLIN OGSTON. 



Index: aggregatum, 14; Ainsworthii, 43; albiflorum,. 

 10; albo-sanguineum, 48; amoenum, 58; anosmum, 68;. 

 Aphrodite, 63; aqueum, 53; aureo-flavum, 10; aureum,, 

 50; Balleanum, 43; Barberianum, 60; barbatulum, 19; 

 Bensonise, 67; bicameratum, 12 ; bigibbum, 22; Boxallii, 

 61; Brymerianum, 16; Calceolaria, 30; Calceolus, 30; 

 capillipes, 41 ; carinif erum, 32 ; chrysanthum, 54 ; Chry- 

 sotis,27; chrysotoxum, 17; clavatum, 24; Cooksonianum, 

 43; crassinode, 60; crepidatum, 66; cretaceum, 74; cm- 

 entum, 33; crumenatum, 6; cumulatum, 2; crystallinum, 

 65 ; Dalhousianum, 31 ; Dayanum, 18 ; Dearei, 3 ; densi- 

 florum, 8; Devonianum, 57; dixanthum, 29; Draconis, 

 37; erythroxanthum, 13; Falconeri, 62; Farmerii, 10; 

 Findleyanum, 46; fimbriatum, 25; formosum, 35; Free- 

 manii, 69; fuscatum, 26; Fytchianum, 19; Gibsonii, 28; 

 giganteum, 62, 68, 71 ; gratiosissimum, 64; Griffithianum, 

 9; heterocarpum, 49; hololeuca, 23; Hookerianum, 27; in- 

 fundibulum, 36; Jamesianum, 36; Japonicum, 40; Jen- 

 kinsii, 15; lasioglossum, 52; leucolophotum, 4; Linawi- 

 anum, 44; lituiflorum, 69; Loddigesii, 56 ; longicornu, 34 ;, 

 Lowii,39; luteolum, 50; Macf arlanei, 20 ; macrophyllum,. 

 18,68; McCarthiffi, 70 ; monili forme, 40; moschatum, 30; 

 nobile, 43; nobilius, 43; ochreatum, 55; oculatum, 25; 

 Palpebrse, 5; Parishii, 45; Paxtoni, 25, 54 ; Phaleenopsis^ 

 23; Pierardi, 73; primulinum, 72; pulchellum, 56; rho- 

 dopterygium, 49; Ruckeri, 51; scabrilingue, 38; Schroe- 

 derianum,23; Schroaderi, 8 ; secundum,!; suavissimum, 

 17; sulcatum, 11; superbiens, 21; superbum, 68; thyrsi- 

 florum,7; tortile, 47; transparens, 71; Veitchianum,l&}, 

 Wardianum, 59. 



