DUVALIA 



312 



EARTHING-UP 



DUVA'LIA. (Named by Haworth in compliment to 

 H. A. Duval, a French author of a work on succulent 

 plants. Nat. ord. Asclepiadaceaa. A genus separated 

 from Stapelia.) 



Dwarf, succulent-stemmed greenhouse plants, mostly 

 with purple-brown flowers. Cuttings of the succulent 

 stems, well dried before insertion in sand or very sandy 

 soil. Loam, finely broken bricks and brick dust. 

 Keep the plants rather dry at the roots, and quite dry 

 overhead in winter. 

 D. angusti'loba (narrow- lobed). Purple-brown, white. 



S. Africa. 1875. 



caspito'sa (tufted). S. Africa. 1790. 

 compa'cta (compact). J Brown. August. S. Africa. 



1800. 

 Cordero'yi (Corderoy's). Purple-brown, with lilac 



hairs. 1874. 



e'legans (elegant). Purple. S. Africa. 1795. 

 glomera'ta (clustered). Brown. S. Africa. 1804. 

 hirte'lla (slightly-hairy). Brown. S. Africa. 1800. 

 ;ac^Mtta'na(Jacquinian). Purple. S.Africa. 1802. 

 Iceviga'ta (smooth). Brown. S. Africa. 1800. 

 masto'des (teat-like). S. Africa. 1800. 

 poli'ta (polished). Purplish-chocolate. S. Africa. 



1876. 

 propi'nqua (related). Red-brown, yellow. S. Africa. 



1904. Related to D. ccespitosa. 

 radio.' to. (rayed). S. Africa. 1774. 

 reclina'ta (bent-down). S. Africa. 1795. 

 replica'ta (folded-back). S. Africa. 1806. 

 sulca'ta (furrowed). J. Brown-red. Arabia. 1910. 

 tubercula'ta (tuberculed). See D. RADIATA. 



DUVAU'A. See SCHINUS. 



D. denta'ta (toothed). See SCHINUS DEPENDENS. 

 depe'ndens (hanging). See SCHINUS DEPENDENS. 

 latifo'lia (broad-leaved). See SCHINUS LATIFOLIUS. 

 longifo'lia (long-leaved). See SCHINUS DEPENDENS. 

 ava'ta (egg-leaved). See SCHINUS DEPENDENS. 



DUVERNO'YA. (A commemorative name. Nat. ord. 

 Acanthacea;.) 



Stove perennial herb. Cuttings in sand in a close 

 case, with bottom-heat. Loam, leaf-mould, and sand. 

 D. Dewe'vrei (Dewevre's). 2. White, with red stripes. 

 Congo. 1909. 



DWARF FAN-PALM. Chamcs'rops hu'milis. 



DWARF STANDARD is a fruit-tree on a very short 

 stem, with its branches untrained. 



DY'CKIA. (Named in honour of Prince Salm-Dyck, a 

 German author of a splendid work on Succulents. Nat. 

 ord. Bromelworts [Bromeliaceae]. Linn. 6-Hexandria, 

 3-Trigynia. Allied in appearance to a small Pitcairnia.) 



Like a pine-apple plant in miniature ; usually grown 

 with small greenhouse succulents. Suckers ; loam and 

 peat, with lime-rubbish, and well drained. Summer 

 temp., 55 to 75 ; winter, 38 to 45". 

 D. alti'ssima (tallest). Orange. September. Buenos 

 Ayres. 



arge'ntea (silvery). Leaves covered with grey scales. 



brachifo'ha (short-leaved). Yellow. Brazil. 1869. 



desmetia'na (Desmetian). Red. Brazil. 



fioribu'nda (free-flowering). Argentina. 



fri'gida (stiff). Orange. February. Brazil. 1877. 



gigante'a (giant). See D. ALTISSIMA. 



lemairea'na (Lemairean). Orange-red. Brazil. 1874. 



leptosta'chya (slender-spiked). Bright scarlet. Para- 

 guay. 1884. 



pri'nceps (chief). See D. ALTISSIMA. 



rariflo'ra (scattered-flowered). 2. Orange. June. 

 Brazil. 1832. 



remotiflo'ra (remote-flowered). 



rega'lis (regal). See D. FRIGIDA. 



remotiflo'ra (remote-flowered). See D. RARIFLORA. 



sulphu'rea (sulphur). Montevideo. 



DYER'S GREEN-WEED. Geni'sta tincto'ria. 

 DYER'S YELLOW- WEED. Rese'da Lute'ola. 



DY'PSIS. (From dupto, dupso, to dive. Nat. ord. 

 Palmaceae.) 



Stove Palms of small size, with a reed-like stem. See 

 PALMS FOR CULTURE. 

 D. Hildebra'ndlii (Hildebrandt's). Madagascar. 



madagascarie'nsis (Madagascar). Madagascar. 



pinna' tifrons (pinnate-leaved). Madagascar. 



DYSCHORI'STE. (From duschoristos, not easily 

 separated. Nat. ord. Acanthaceae.) 



A free-flowering stove shrub. Cuttings of young wood 

 with a heel in light sandy soil,in a close case, with bottom- 

 heat. Fibrous loam, leaf-mould, and sand. 

 D. Hildebra'ndtii (Hildebrandt's). Purple-blue. British 

 Central Africa. 1903. 



DRYSO'DIA. (From dusodes, evil-smelling ; flower- 

 head and leaves give off a strong odour. Nat. ord. 

 Composite.) 



Greenhouse or stove herbs with deeply-cut leaves and 

 oily glands on the floral bracts. Cuttings in sand in a 

 close case. Fibrous loam, leaf-mould, and sand. 

 D. chrysanthemoi'des (Chrysanthemum-like). Yellow. 



Mexico. 

 grandiflo'ra, (large-flowered). i. Dark orange. 



Mexico. 



pube'scens (downy), ij. Golden-yellow. Mexico. 

 1828. 



DYSOPHY'LLA. (From dusodes, fetid, and phullon, a 

 leaf ; referring to the strong peppermint-like smell of 

 the leaves. Nat. ord. Lipworls or Labiates [Labiatae]. 

 Linn. i^-Didynamia, i-Gymnospermia. Allied to Mint.) 

 Division of the roots, just as fresh growth is com- 

 mencing, in spring ; common, sandy soil. 

 D. crassicau'lis (thick-stemmed). . Purple. August. 



Himalaya. 1826. Hardy herbaceous. 

 pu'mila (dwarf). See D. CRASSICAULIS. 

 quadrifolia (four-leaved). 2. Purple. July. Nepaul. 



1820. Greenhouse evergreen. 

 stella'ta (starry- flowered), i. Purple. India> 1816. 



Greenhouse herbaceous. 



verticilla'ta (whorled). Lilac. Nepaul. 1828. Green- 

 house herbaceous. 



DYSSOCHRO'MA. (From dussoos, pale, and chroma, 

 colour ; in allusion to the pale green flowers. Nat. ord. 

 Solanaceae.) 



Greenhouse shrubs. Cuttings in sandy soil in heat. 

 Good fibrous loam, leaf-mould, and sand. 

 D. exi'mia (choice). Green. June. Country unknown. 

 viridiflo'ra (green-flowered). 3. Green. Brazil. 1815. 



EARI'NA. (From earinos, the spring, the time of their 

 blooming. Nat. ord. Orchids [Orchidacea?.] Linn. 20- 

 Gynandria, i-Monandria. Allied to Pholidota.) 



Stove orchids, from New Zealand. Division of the 

 plants when fresh growth is commencing ; sphagnum- 

 moss and fibrous peat, in which the roots are fixed above 

 the surface of a pot, or in a shallow basket, and sus- 

 pended from the roof. Summer temp., 60 to 85, with 

 moisture ; winter, 50 to 60, and rather dry. 

 E. mucrona'ta (sharp-pointed). White. May. 1845. 

 suave'olens (sweet-scented). White. May. 1843. 



EAR-SHELLED SLUG. See Testace'lla. 



EARTH. Every cultivated soil is mainly composed of 

 four earths in various proportions : Silica, or pure flint ; 

 alumina, or pure clay ; lime, combined with carbonic 

 acid in the state of chalk ; and humus. See SOIL. 



EARTHING-UP, or drawing the soil in a ridge to the 

 stems of plants, is beneficial to those fibrous-rooted, by 

 reducing the distance from the surface of the extremities 

 of the plant's roots ; by inducing the production of root- 

 lets from the stem ; and sheltering the winter standing 

 crops, for the closer the leaves of these are to the earth 

 the less is the reduction of heat from the latter, either by 

 radiation or contact with the colder air ; but to tuberous- 

 rooted plants, as the potato, it is detrimental. In our 

 experiments, it has, on an average, reduced the produce 

 one-fourth. 



