THRIPS 



856 



THUYA 



T. e'legans (elegant). See T. RADIATA. 

 eleganti' ssima (very-elegant). 1871. 

 exce'lsa (lofty). Jamaica. 1800. 

 ferrugi'nea (rusty). Jamaica. 1840. 

 Ga'rberi (Garber's). Florida. 

 gra'cilis (graceful). See T. RADIATA. 

 graci'llima (very-graceful). 1877. 

 graminifo'lia (grass-leaved). See T. MULTIFLORA. 

 gra'ndis (grand). Cuba. 1870. 

 havane'nsis (Havana). W. Ind. 1869. 

 Ma'rtii (Martius'). Cuba. 

 Miragua'na (Miraguan). Cuba. 1852. 

 Morri'sii (Morris'). 3-5. W. Ind. 1891. 

 multiflo'ra (many-flowered). 8. Dominica. 1847. 

 ,, parviflo'ra (small-flowered). 15. White, green. 



Jamaica. 1778. 



,, Pumi'lio (Pumilio). Jamaica. 1738. 

 ,, radio.' ta (rayed). 5-10. W. Ind. 1824. 

 stella' ta (starry). See T. MIRAGUANA. 



THRIPS. Thrips Adonidum is one of the worst pests 

 that can gain a footing in our stoves and greenhouses. 

 The larva? and pupae are yellowish-white, and the perfect 

 insect is of a dull, deep black, with the point, and some- 

 times the whole of the abdomen, of a rust colour ; the 

 wings are dirty white ; the horns and legs yellowish, the 

 extremity of the former black. It attacks plants by 

 piercing the under side of the leaves ; and one often 

 sees, at the tip of the tail, a globule of blackish fluid, 

 which it soon deposits, and, by innumerable spots of 

 this glutinous matter, the pores of the leaves are stopped 

 up, and large portions of the surface become blotched. 

 During March the full-grown larvae and pupae, which 

 are as large as the perfect insect, are found in groups, 

 feeding on the under side of the leaves ; and at this 

 time the recently-hatched but perfect insect either lies . 

 close under the ribs, or roves about in search of a mate 

 (Curtis'). Flowers of sulphur have been recommended 

 as destructive of this plague, but we believe that Scotch 

 snuff, applied by means of a dredging-box (perhaps 

 Brown's Fumigator would answer), is as effectual an 

 application as any. Prevention, however, is better than 

 cure ; and if the plants are kept healthy by due ventila- 

 tion, and by moisture both in the air and soil, this insect 

 may be usually banished. 



T. ochraceus infests the ripe fruit of plums, peaches, 

 and nectarines, piercing the stalks, and causing their 

 fall, and rendering the fruit disgusting. It was first 

 noticed and described by Mr. Curtis. It is narrow and 

 linear, of a bright and deep ochreous colour, the eyes are 

 black, the horns appear to be only six-jointed and 

 brownish at the tips, it has three ocelli in the crown, the 

 body is hairy, the tip pointed and bristly, the wings are 

 shorter than the body in the male, lying parallel on the 

 back when at rest, narrow, especially the under ones, 

 and fringed, the hairs longest beneath and at the point, 

 tips of feet dusky. It is destroyed by the same means 

 as T. Adonidum. 



THRIXSPE'RMUM. (From thrix, a hair, and sperma, 

 a seed ; the seeds are hair-like. Nat. ord. Orchidacea?. 

 Now referred to Sarcochilus.) 



T. Berkele'yi (Berkeley's). See SARCOCHILUS BERKELEYI. 

 Freema'nii (Freeman's). See SARCOCHILUS FREE- 



MANII. 



Hartma'nni (Hartmann's). See SARCOCHILUS HART- 



MANNI. 

 indusia'tum (indusiate). See SARCOCHILUS INDUSIA- 



TUS. 

 luni'ferum (crescent-bearing). See SARCOCHILUS 



LUNIFERUS. 



Moo'rei (Moore's). See SARCOCHILUS MOOREI. 



muricula'lum (finely- warted). See SARCOCHILUS 



MURICULATUS. 



sillemia'num (Sillemian). See SARCOCHILUS SILLE- 



MIANUS. 

 unguicula' turn (clawed). See SARCOCHILUS UNGUI- 



CULATUS. 



THROATWORT. Campanula Trache'liwn and Trache'- 

 liutn cczru'leum. 



THRYA'LLIS. (An old Greek name. Nat ord Mal- 

 pighiaceae.) 



Evergreen stove shrub. Cuttings in sand in bottom- 

 heat Loam, peat, and sand. 



T. brachy'stachys (short-spiked). 4. August. Brazil. 

 1823. 



THRYPTO'MENE. (From thrupto, to break to pieces, 

 and mene, the moon. Nat. ord. Myrtaceae.) 



A slender, heath-like shrub. Cuttings in sand under a 

 hand-light. Loam, peat, and plenty of sand. 

 T. saxi'cola (rock-dwelling). 2-3. White. July. 

 Australia. 1824. 



THU'JA. See THUYA. 

 THUJOPSIS. See THUYA. 



THUNBE'RGIA. (Named after C. P. Thunberg, the 

 celebrated botanist. Nat. ord. Acanthads [Acanthaceag]. 

 Linn. i^-Didynamia, 2-Angiospermia.) 



Stove evergreen climbers. Seeds in early spring, in 

 a strong, moist, sweet hotbed ; cuttings, any time before 

 the end of August, in sandy soil, under a bell-glass ; 

 fibrous loam and peat, with a little rotten dung and lime- 

 rubbish. Winter temp., 48 to 60 ; summer, 60 to 80. 

 As they are very subject to red spider, perhaps the best 

 mode of treating these fine plants is to grow them as 

 annuals, throwing the plants away in the end of autumn. 

 If preserved, the flowers of sulphur and the syringe 

 must hardly ever have a holiday. Indeed, the syringe and 

 a little shade are necessary to their health in summer. 

 T. affi'nis (related). Purple-blue, with yellow throat. 



September. Trop. Africa. 1887. 

 ala'ta (winged). 4. Yellow. June. E. Ind. 1823. 

 a'lba (white-flowered). 4. White. May. Mada- 

 gascar. 



auranti'aca (orange-flowered). 4. Orange. May. 

 Do'<WsM (Dodds's). Golden yellow ; throat violet. 

 angula'ta (angular). 4. June. Madagascar. 1823. 

 cape'nsis (Cape). 3. Yellow. June. S.Africa. 1824. 

 ,, chry'sops (golden-eyed). 3. Blue. Violet. June. 



Sierra Leone. 

 cocci'nea (scarlet). 4. Scarlet. June. Himalaya; 



Burma. 1823. 



corda'ta (heart-leaved). See T. FRAGRANS. 

 Do'ddsii (Dodds's). See T. ALATA DODDSII. 

 ,, dregea'na (Dregean). S. Africa. 

 ere' eta (erect). 4-6. Blue ; orange in throat. July. 



Trop. Africa. 1857. Shrub. 

 a'lba (white). White, with yellow throat. 

 fra' grans (fragrant). 4. White. June. Trop. Asia. 



1796. 

 grandiflo'ra (large-flowered). 6. Blue. June. India. 



1820. 



a'lba (white). White. 1892. 

 ,, Ice'vis (smooth). Scentless. 

 Harri'sii (Hams'). See T. LAURIFOLIA. 

 ,, ha:vtaynea'na (Hawtayne's). 10. Scarlet. June. 



Nepaul. 1826. 

 Ki'rkii (Kirk's). 2-4. Purple. September. Trop. 



Africa. 1876. 

 laurifo'lia (laurel-leaved). Blue. Summer. Malaya. 



1856. 

 mysore'nsis (Mysore). Yellow, pale purple. June. 



S. India. 1854. 

 natale'nsis (Natal). 2-3. Blue. July. S. Africa. 



1858. 

 primuli'na (primrose-like). Primrose. August. E. 



Trop. Africa. 1904. Herbaceous. 

 vogelia'na (Vogelian). Purple. Summer. Trop. 

 Africa. 1863. 



THUNDER PLANT. Sempervi'vum tecto'rum. 



THU'NIA. (Meaning not clear. Nat. ord. Orchi- 

 daceae. Now referred to Phaius.) 

 T. a'lba (white). See PHAIUS ALBUS and varieties. 

 Benso'nia (Mrs. Benson's). See PHAIUS BENSON^E. 

 ,, brymeria'na (Brymerian). See PHAIUS BRYMERIANUS. 

 ,, candidi' ssima (whitest). See PHAIUS CANDIDISSIMUS. 

 Marsha'lliez (Mrs. Marshall's). See PHAIUS MARSHAL- 

 LI^. 

 marshallia'na (Marshallian). See PHAIUS MARSHAL- 



LI^. 

 pu'lchra (fair). See PHAIUS ALBUS. 



THU'YA. Arborvita?. (From thuon, a sacrifice ; the 

 resin used as incense in Eastern sacrifices. Nat. ord. 

 Conifers [Coniferae]. Linn. zi-Moncecia, lo-Decandria.) 



Hardy evergreen trees. Seeds, which ripen freely, or 

 by cuttings ; the seeds are best sown in April, slightly 



