TUS 



I 900 ] 



ULM 



T. ni'vea (snowy), l. White. April. Swit- 

 zerland. 1713, 



palma'ta (hand-leaved). . White. April. 



Labrador. 1778. 



purpu'rea (purple). Purple. July. C, of 



G. Hope. 1825. 



sagitta'ta (mow -leaved). . White. April. 



N. America. 



TWEE'DIA. (Named after Mr. 

 Tweedie, a botanical collector. Nat. 

 ord,, Asclepiads [Asclepiadaceoe]. Linn., 

 5-Pentandria 2-Digynia.) 



Greenhouse twiners. Seeds, in a slight hot- 

 bed, in spring ; cuttings of young shoots getting 

 firm at the base, in sand, under a bell-glass, in 

 April or May ; sandy fibry loam, with a little 

 peat, and leaf-mould: require the protection 

 of a cool greenhouse in winter. 

 T. cceru'lea (blue). 3. Blue. Buenos Ayres. 

 1836. 



floribu'nda (bundle-flowered). Pink. July. 



Brazil. 1838. 



versi'color (changeable-colored). 3. Blue. 



July. Tucumania. 1836. 



TYLO'PHOEA. (From tylos, a swelling, 

 and phoreo, to bear ; the swollen pollen 

 masses. Nat. ord., Asclepiads [Ascle- 

 piadaceee]. Linn., 5-Penlandria 2-Di- 

 gynia.) 



Greenhouse evergreen twiners. Cuttings of 

 either old or young shoots, in very sandy loam, 

 and brick and old lime rubbish, in spring, 

 though any time will do ; sandy loam, lime 

 rubbish, and little old dried cow-dung. Winter 

 temp., 40 to 45, and dry; summer/fiO to 85, 

 and moist. 



T. barba'ta (bearded). 10, July. New S. 

 Wales. 1822. 



exi'lis (slender). 10. Pale purple. July. 



Sylhet. 1823. 



grandiflo'ra (large - flowered). 10. July. 



N. S. Wales. 1822. 



TYTO'NIA. The Water Balsam. (In 

 honour of A. Tyton, a patron of botany. 

 Nat. ord., Balsams [ Balsaminaceae ]. 

 Linn., 5-Pentandria LMonogynia.) 



This genus is now called Hydro'cera. Stove 

 aquatic. Seeds sown in spring, in a good hot- 

 bed, and grown in strong loamy soil, with the 

 pot immersed in water in a tub, and receiving 

 the high temperature of a plant-stove from 

 65 to 90. 



1. na'tans (swimming). Various, August. 

 E. Indies, 1810. 



U. 



ULCER. See Canker. 



U'LEX. Furze. (From the Celtic 



ac, a point ; the prickly branches. Nat. 



ord., Leguminous Plants [Fahaceai]. 



Linn , IG-Monadelphia ft-Decandria.) 



Hardy, yellow-flowered evergreens . Seeds, 



in spring, deep light soil, though not very par- 

 ticular. The gorse, whin, or furze, is valuable, 

 not only for its great beauty, but as constituting 

 a valuable fodder and fence plant. The Double- 

 blossomed Furze is very beautiful, and worthy 

 of a place in small gardens, and is propagated 

 by cuttings in spring and autumn, in a shady 

 sandy border, or under hand-glasses. The 

 Upright, or Irish, Furze is propagated in a 

 similar manner, and is also valuable for fodder ; 

 but it seldom flowers, and when it does has 

 generally only a few flowers on a plant. We 

 are not aware that it has been raised true from 

 seed, and therefore it is supposed to be not a 

 species, but a variety of Europcea or nana. 

 See Hedge. 

 U. Europce'a (European. Common). 6. June. 



Britain. 

 flo're-ple'no (double - flowered). 



6. May. Britain. 



na'na (dwarf). 2. August. Britain. 



Provincia'lis (Provence). 4. July. South 



Europe. 1823. 



stri'cta (erect. Irish). 10. October. Ireland. 



ULLO'A. See Juanutto'a, 



U'LMUS. The Elm. (From the 

 Celtic name itlm. Nat. ord., Elmworls 

 [Ulmacere]. Linn., b-Pcntandria 2- 

 Digynia.) 



Nearly all hardy ; all deciduous, and brown- 

 flowered, blooming in April. Campestris, and 

 its allies, by suckers and layers, and by graft- 

 ing on the montana. The latter is also propa- 

 gated, not by suckers, but by layers, which root 

 freely ; but chiefly by seeds, which should be 

 gathered in June as soon as ripe, and sown in 

 light mellow soil; or dried and put in bags 

 until the following March or April. Deep, dry, 

 sandy loam suits all this species and varieties, 

 and produces the most valuable timber. 

 U. ala'ta (winged). 30. N.America. 1820. 



a'lba (white- Hungarian). 30. Hungary. 



1824. 



America'na (white- American'), 40. N. 



America. 



a'lba (white-branched), 40. N. 



America. 



fo'lils - variega'tis (variegated- 

 leaved). 



inci'sa (cut-leaved). N. Ame- 

 rica. 



" pe'ndula (drooping). N.America. 



1820. 



ru'bra (red-branched). 40. N. 



America. f824. 



campe'stris (English-field.). 80. Britain. 



' acutifo'lia (acute-leaved). 80. 



Britain, 



a'lba (white). 80. Britain. 



_ _ betul&fo'lia (Birch - leaved). 



Britain. 



Chine'nsis (Chinese). China. 



concavatfo lia (concave-leaved). 



Britain. 

 Cornubie'nsis (Cornish). 8, 



Britain. 



"* cuculla'ta (hoodedL-leaved), 



fo'liis-au'reis (leaves golden - 



variegated). Britain. 



