DISCHIDIA 



301 



DITTANY 



and hot ; sandy loam and peat. Summer temp., 55 to 



75 ; winter, 40 to 45. 



D. austra'lis (southern). Yellow. May. Australia. 



1824. 



., linifo'lia (flax-leaved). Monte Video. 1882. 

 longispi'na (long-spined). White. Argentina. 

 serratifo'lia (serrate- leaved). 6. Greenish- white. 



Chili ; Patagonia. 1882. 



Tou'matou (Toumatou). White. New Zealand. 

 1875. " Toumatou or Wild Irishman." 



DISCHI DIA. (From dis, twice, and schizo, to split ; 

 referring to an obscure process in the construction of the 

 flower. Nat. ord. Asclepiads [Asclepiadaceae]. Linn. 

 S-Pentandria, i-Monogynia. Nearly related to Stephan- 

 otis and Hoya.) 



Stove evergreen trailers, with white flowers. Cuttings 

 in sandy soil, in heat, any time in the spring and summer 

 months ; sandy loam. Summer temp., 60 to 80 ; 

 winter, 48 to 55. 

 D. bengale'nsis (Bengal). i|. September. India. 



1819. 



hirsu'ta (hairy). Red. Burma ; Malaya. 1896. 

 Nummula'ria (raoneywort-/avf). $. August. 



Amboyna. 



,, ova! to. (egg-shaped). New Guinea. 

 rafflesia'na (Rafflesian). Yellowish. Trop. Asia ; 

 Australia. 



DISCHI SMA. (From di, two, and schizo, to cut ; the 

 calyx is two parted. Nat. ord. Selaginaceae.) 



Greenhouse evergreen shrubs. Short young shoots in 

 sandy peat under a bell-glass. Fibrous loam, peat, and 

 sand. 

 D. cilia' turn (eye-lashed), i. White. July. S. Africa. 



1815. 

 clandesti'num (secret), i. White. June. S. Africa. 



1823. 



erinoi'des (Erinus-like). i to 2. White. May. S. 

 Africa. 1816. 



DISEASES. The morbid affections to which the 

 vegetable part of the creation is liable are almost as 

 numerous as those which render decrepid and destroy 

 the animal tribes. The smut which ravages our corn 

 crops ; the mildew which destroys our peas ; the curl 

 infecting our potatoes ; the ambury, or club root, to 

 which our turnips and other species of cabbageworts are 

 liable ; the shanking, or ulceration, which attacks the 

 stalks of our grapes, are only a few of the most commonly 

 observed diseases to which the plants we cultivate are 

 liable. 



Disease is the negation of health ; and as the health 

 of a plant is the correct performance of its functions, 

 disease may be denned to be an incorrect performance 

 of the functions, due to the injurious effect of the para- 

 sitic fungus. 



Such incorrectness arises from the vital energy de- 

 clining in consequence of old age ; from parasites ; from 

 wounds ; from food improper either in quality or 

 quantity ; and from unfavourable temperature. If all 

 these could be avoided, a plant might enjoy a vigorous 

 immortality. Such, however, is not the lot of any 

 organised being, and we note them chiefly to remind the 

 gardener, that in proportion as he can save any plant 

 from such unfavourable circumstances, will it enjoy 

 health, and length of vigorous life. 



DISE'MMA. (From di, double, and stemma, a crown ; 

 referring to the double coronet, or rays. Nat. ord. 

 Passionworts [Passifloraceae]. Linn. i6-Monadelphia, 

 2-Pentandria. Now referred to Passiflora.) 

 D. adiantifo'lia (Adiantum-leaved). See PASSIFLORA 



CLABRA. 



,, aura'ntia (orange). See PASSIFLORA AURAXTIA. 

 herbertia'na (Herbert's). See PASSIFLORA HERBER- 

 TIANA. 



DISOCA'CTUS BIFORMIS. See PHYLLOCACTUS BI- 



FORMIS. 



DISPE BIS. (From di, double, and pera, a pouch ; 

 from the form of the perianth's outer segments. Nat. ord. 

 Orchidaceae.) 



A genus of ground, or terrestrial orchids, natives of 



the Cape of Good Hope. Division ; peat and loam, with 

 n little sand and charcoal. Summer temp., 60 to 80 ; 

 winter, 45 to 50. 

 D. cape'nsis (Cape), j. Scarlet. July. 1816. 



cuculla'ta (hooded). $. Purple. June. 1822. 



secu'nda (side- flowering). J. Purple. June. 1799. 



DISPORUM. (From di, double, and sporos, a seed ; 

 most species have only two ovules or young seeds in each 

 cell of the seed-vessel. Nat. ord. Melanths [Liliacea?]. 

 Linn. 6-Hexandria, i-Monogynia. Allied to Uvularia.) 



Half-hardy herbaceous plants. Division of the roots 

 in spring ; also by seeds, sown under glass, in April ; 

 peat and loam, most of the first ; require a cold pit in 

 winter. 



D. fu'lvum (tavmy- flowered). See D. PULLUM. 

 Hoohe'rii (Hooker's), i to 2. Greenish. California. 

 ,, lanugino' 'sum (woolly), i. Yellow, green. N.W. 



Amer. 1758. 

 leschenauliia'num (Leschenaultian). White. N. Ind. ; 



Ceylon. 



Menzie'sii (Menzies'). i to 3. Greenish. California. 

 ,, parvifto'rum (small-flowered). See D. PULLUM PARVI- 



FLORUM. 

 pu'llum (russet). i$. Brown. October. China. 



1801. 

 ,, parvifio'rum (small-flowered). 3. Yellow, July. 



Nepaul. 1820. 

 ,, se'ssile (stalkless). Japan. 



,, variega'tum (variegated). Leaves edged with 

 white. 



DISSOTIS. (From dissos, double; in allusion to the 

 two forms of anthers. Nat. ord. Melastomacea?.) 



Evergreen stove shrubs. Cuttings of half-ripe wood 

 in sand, in a close case, with bottom-heat. Loam, peat, 

 and sand. 



D. inca'na (hoary). Purple. S. Africa. 1838. 

 ,, irvingia'na (Irvingian). 3. Purple. Trop. Africa. 



1859- 



,, johnstoniana (Johnstonian). Trop. Africa. 

 Maho'ni (Mahon's). Rose-purple. Uganda. 1903. 

 mode'sta (modest). Blue-purple, reddish and yellow. 



Uganda. 1906. 



,, plumo'sa (plumy). W. Africa. 

 ,, prostra'ta (prostrate). Trop. Africa. 



DIS TEG AN THUS. (From distegos, two-storied, and 

 anthos, a flower. Nat. ord. Bromeliaceae. Allied to 

 Cryp tan thus.) 



Moist stove perennial, requiring treatment similar to 

 ./Echmea and Cryptanthus. 

 D. basilatera'lis (base-sided). Guiana. 



DISTIACA NTHUS. (Apparently a corruption of the 

 previous name. Nat. ord. Bromeliaceas.) 



Stove perennial requiring treatment similar to Crypt- 

 anthus. 

 D. scarlati'nus (scarlet). Red. Brazil. 1869. 



DISTTCTIS. (From di, meaning two, and sliktos, 

 spotted ; in allusion to the spots on the corolla. Nat. 

 ord. Bignoniaceae.) 



Stove climber of a woody character. Cuttings of 

 young side-shoots getting firm at the base, in sand, and 

 placed in a close case with bottom-heat during summer. 

 Fibrous loam, a little peat or leaf-mould and sand. It 

 succeeds best planted out. 



D. lactiflo'ra (milk-white). 20. White. May. St. 

 Domingo. 1823. 



DISTY LJUM. (From di, two or double, and stulis, a 

 style ; the flower has two styles. Nat. ord. Hamameli- 

 dacea?.) 



A hardy shrub related to Hamamelis, but having no 

 petals. Layers, cuttings of the roots and seeds. Ordinary 

 garden soil. 



D. racemo'sum (racemed). Stamens 5, with purple 

 anthers. J apan. 1906. 



DITTANY. Dicta'mnus. 



DITTANY OF AMORGOS. Ori'ganum Tournefo'rtii. 



DITTANY OP CRETE. Ori'ganum Dicta'mnus. 



