SUPPLEMENT. 
585 
Dendrobium—con/inued. 
side lacinie of the lip marked with numerous narrow lines, the 
anterior lacinia sulphur, with an orange blotch on each side of 
the tuft of hairs, very wavy. 1878. Allied to D. Ruckeri. 
D. virgineum (maiden). This resembles D. infundibulum, 
but the flowers are smaller, ivory-white, with two thickened, 
ligulate, reddish lines running from the base to the middle of 
the lip. Birma, 1885. 
D. Wallichianum (Wallich’s). A variety of D. nodile. 
Fic. 16. DENDROBIUM WARDIANUM. 
D. Wardianum assamicum (Assam). /l. smaller but more 
brilliantly coloured than in the type. /. narrower, Stems shorter 
and slenderer (B. M. 5058, under name of D. Falconeri var.). 
The type is illustrated at Fig. 16. 
D, W. giganteum (gigantic).* /l. larger and stouter than those 
of the type. Winter and spring. /. sometimes 5ft. Birma. 
A grand variety. (W. O. A. ili. 113; F. M. ser. ii. 212.) 
D. Williamsianum (Williams’).* /. large; sepals ivory-white, 
the dorsal one and the ivory-white petals broadly oblong, 
apiculate, the lateral sepals triangular, the disk of the petals 
washed light purple ; lip purple, having an angular chin, standing 
upright, adpressed to the column, the limb roundish; racemes 
about twelve-flowered, produced from the upper part of the 
slender bulbs. New Guinea, 1886, (G. C, n. s., xxvi., p. 173; 
W. O. A. 252.) 
DENDROCHILUM CUCUMERINUM. 
nym of Platyclinis cucumerina (which see). 
DEYEUXIA (named in honour of Nicholas Deyeux, 
1753-1837, a French chemist). Syn. Lachnagrostis. Orp. 
Graminee. A genus embracing nearly 120 species of 
greenhouse 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 ; 
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, lft. to 14ft. long, of a deep, bright green, bordered with 
creamy-yellow. Rootstock thick. New South Wales, 1884. An 
elegant, greenhouse, foliage plant. 
DIACRIUM (from dia, through, and akris, a point; 
in allusion to the sheaths on the stalk). Orp. Orchidew. 
Of this genus four species have been described: they are 
A syno- 
Diacrium—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 psendo- 
bulb. Only one species calls for mention. For 
its successful cultivation, it requires a light 
situation in a very moist stove. 
D. bicornutum (two-horned). The correct name 
of the plant described on p. 512, Vol. I., as Epi- 
dendrum bicornutwimn. 
DIANTHERA. Of the eighty species in- 
eluded 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). 7. whitish, small, fascicled in 
the axils of the minute, opposite bracts. /. opposite, 
shortly petiolate, Shin. to 4hin. long, 2sin. to 2in. 
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. (I. H. 1886, 589.) 
DIANTHUS. To the species described on 
pp. 461-4, Vol. I., the following should now be 
added : 
D. cinnabarinus (cinnabar-red). _fl. petals fiery-red 
above, paler beneath, covered with sessile glands; 
stamens not exserted. Summer. /. narrow-linear, 
with very acute, rigid tips. Thessaly, 1888. A fine 
species, suffrutescent at the base. 
D. superbus nanus (dwarf). A dwarf variety, growing only 
Gin: in height, and covered with rosy-purple, deeply-fringed 
owers. 
D. sylvestris (wood-loving). The correct name of the plant 
deseribed on p, 464, Vol. L., as D. virgineus. 
DICHZA. About a dozen species are ineluded in 
this genus. To that described on p. 465, Vol. L., the 
following should now be added: 
D. vaginata (sheathed). /. 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 dicha, double, and pogon, a 
beard; in allusion to the two appendages of the anthers). 
Orp. Liliacew. 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. Rhizome short; root- 
fibres fascicled, often bearing tubers. D. strictus, 
the only species as yet in cultivation, thrives in a 
compost of sandy loam and peat, and may be increased 
by divisions of the rhizome, or by the tubers on the 
root-fibres. 
D. strictus (straight). (/., perianth pale or dark purple, lin. or 
less in diameter, the segments horizontally spreading, the outer 
ones elliptic-oblong, acute, the inner twice as broad ; raceme or 
panicle din. to 8in. long. November. /. 1)ft. long, din. broad, 
concave, Grass-like, sheathing at the very base. Stem longer 
than the leaves, erect, stout or slender. Tubers }in. to jin. 
long, fleshy. 1883. (B. M. 6746.) 
