Supplement. 



535 



Dendrobium — continned, 



side laciuiie of the lip marked with numerous narrow lines, the 

 anterior lacinta sulphur, with an orange blotch on each side of 

 the tuft of haira, very wavy. 1878, Allied to D. Ruckeri, 



D. Tirgineum (maiden). This resembles D. infundibuhtmy 

 but the flower:^ are smaller, ivory-white, with two thickened, 

 Itgulate, reddish lines running from the base to the middle of 

 the lip, iJirma, 1885. 



D. Wallichianum (Wailich's). A variety of D nobV.e. 



Fig, 16. DEr^DiiOBirM Warbia^uw* 



D. Wardlanum assamicnm (Assam). /. smaller but more 

 brilliantly coloured than in the type. I. narrower. Stems shorter 

 and slenderer (B. M. 5058, under name of D. Faleo^xeri van). 

 The type is illustrated at Fig. 16. 



D. W, giganteum (gigantic).* fi. larger and stouter than those 

 of the type. Winter and spring, h. sometimes 5ft. Birma, 

 A grand variety. (W. O, A. iii. 113 ; F. M. ser. ii. 212.) 



D. Williamslanuni (Williams').* fl, large ; sepals ivory-white, 

 the dorsal one and the ivory-white petals broadly oblong, 

 apiculate, the lateral sepals triangular, the disk of the petaU 

 washed light purple ; lip purple, having an angular chin, standing 

 upright, adpressed to the column, the limb roundish; racemes 

 aboxit twelve-flowered, produced from the upper part of the 

 slender bulbs. New Guinea, 1886. (G. C. n, s., xxvi., p. 175; 

 W. O. A. 252.) 



DENDSOCHILUM CUCUMEBINUM. A syno. 

 nym of Platjclinis cucumerina (which see), 



DETEITXIA (named in honour of Kicholas Deyenx, 

 1753-1837j a French chemist). Syn. Lachnagrostis, Okd. 

 Graminew, A genua embracing nearly 120 species of 

 greenhouBe or hardy, mostly perennial Grasses, broadly 

 dispersed over the temperate and mountainous regions of 

 the globe, Spikelets one-flowered, variously paniculate ; 

 glumes three, the two inferior ones empty ; stamens three j 

 panicles terminal. Leaves usually flat. D. elegans varie- 

 gata is the only plant of the genus yet introduced which is 

 deserving of mention here; it thrives under ordinary 

 treatment. The genus is represented in the British Flora 

 by D. neglecta, a rare species. 



D. elegans variegata (elegantly variegated). /, numerous, 



linear, 1ft. to lift, long, of a deep, bright green, bordered with 

 creamy-yellow. Rootstock thick. New South Wales, 1884. An 

 elegant, greenhouse, foliage plant, 



, ^^lACRlXTM (from dia^ through, and alcris, a point; 

 in allusion to the sheaths on the stalk). Obd. Orchidece, 

 Of thia genus four species have been described : they are 



Diacrituu — continued. 



stove, epiphytal Orchids, natives of Mexico, Central 

 America, and Guiana. Flowers showy, loosely racemose, 

 shortly pedicellate ; sepals sub-equal, free, spreading, 

 rather thick, petaloid; petals somewhat similar; lip 

 spreading from the base of the column, nearly equalling 

 the sepals, the lateral lobes spreading or reflexed, the 

 disk elevated between the lateral lobes, two - horned 



above ; column short and broad, slightly in- 

 curved ; pollen masses four ; peduncle terminal, 

 simple, with paleaceous sheaths. Leaves few, 

 articulated with the short sheaths. Stem fleshy, 

 scarcely thickened into an elongated pseudo- 

 bulb. Only one species calls for mention. For 

 its successful cultivation, it requires a light 

 situation in a very moist stove. 



D. bicomutum (two-horned). The correct name 

 of the plant described on p. 512, Vol. I., as Bpi- 

 dendrum bicomutum, 



DZANTHERA. Of the eighty species in- 

 cluded in this genus, two or three are natives 

 of tropical Africa or Asia, and the rest are all 

 tropical or extra-tropical American. To those 

 described on p. 461, Vol. I., the following 

 should now be added ; 



D. bullata (studded), fl. whitish, small, fascicled in 

 the axils of the minute, opposite bracts. I. opposite, 

 shortly petiolate, ^m. to 4Mn. long, 2:^in. to 2|in. 

 broad, elliptic, obtusely acuminate, slightly con- 

 tracted at base, cordate, bullate between the veins, 

 glabrous, dark green above, purple and pubescent 

 on the veins beneath. Stem terete, fuscous -purple. 

 Borneo, 1886. Stove. (X. H. 1885, 589.) 



TJIATTTHUS, To the species described on 

 pp. 461-4, Vol. I., the following should now be 



added : 



D, Ginnabarinus (cinnabar-red). Jt, petals fiery-red 

 aoove, paler beneath, covered with seasile glands; 

 stamens not exserted. Summer. /. narrow-linear, 

 with very acute, rigid tips. Thessaly, 1888. A fine 

 species, suffrutescent at the base. 



D.^snperbus nanus (dwarO- A dwarf variety, growing only 



6in. in height, and covered with rosy-purple, deeply-fringed 

 flowers. 



D. sylvestrls (wood-loving). The correct name of the plant 

 described on p. 464, Vol. I., as D, virgineus. 



DICHJCA. About a dozen species are 

 this genus. To that described on p. 4b'5, 

 following should now be added: 



included in 

 Vol. I., the 



D. vaginata (sheathed), fi, white, very small. Stems long and 

 flattened, with close-set, distichous, small-sized leaves. Mexico, 

 1885. A neat plant, suitable for basket culture. 



DICHOPOGON (from diclia, double, and pogon, a 

 beard; in allusion to the two appendages of the anthers). 

 Obd. Liliaceas, A small genus (two species) of greenhouse, 

 perennial herbs, natives of Australia and Tasmania. 

 Flowers loosely racemose, solitary or fascicled in the 

 scarious bracts; perianth marcescent, persistent, not 

 twisted, the segments distinct, spreading, the inner ones 

 broader; stamens six, hypogynous; pedicels slender, often 

 jointed above the middle ; scape often branched, leafless, 

 or furnished with leafy bracts below the inflorescence. 

 Leaves radical, narrow-linear. Ehizome 

 fibres fascicled, often bearing tubers, 

 the only species as yet in cultivation, 

 compost of sandy loam and peat, and may be increased 

 by divisions of the rhizome, or by the tubers on the 

 root- fibres. 



D. Strictns (straight). Jt, perianth pale or dark purple, l^in. or 

 less in diameter, the segments horizontally spreadmg, the outer 

 ones elUptic-oblong, acute, the inner twice as broad ; raceme or 

 panicle 3in. to Bin. Jong. November. I. im. long, im. broad, 

 concave, Grass-like, sheathing at the very ha^e. Stem longer 

 than the leaves, erect, stout or slender. Tubers im. to Iul 

 Ions, fleshv. 1883. (B. M. 6746.) 



short ; root- 



D, strictus, 



thrives in a 



