Bark 



( 102 ) 



Barometer 



sand in equal parts. Polypbylla, summer, scarlet, 

 is also known as Clitorea polyphylla, and Galactia 

 pinnata, 



BARK. 



The exterior covering of dicotyledonous trees. 



Bark-bound is a condition generally induced in 

 a tree by too poor a rooting medium or a badly 

 drained border. It is highly injurious to the trees 

 affected, often causing gumming in the Peach, 

 Cherry, and other stone fruits. The old school of 

 gardeners were wont to slash and score their bark- 

 bound trees with a knife, but modern opinion 

 emphatically condemns this as barbarous and 





BAKKEKIA ELEGANS. 



ineffectual, and prescribes as a remedy the better 

 draining and working of the soil. 



Bark shedding takes place annually to a con- 

 siderable extent in the Plane Tree. The lower 

 parts of trees are often " barked " by rabbits ; to 

 prevent this the base of the tree trunk should be 

 protected with wire netting. 



Oak bark was formerly in great request as a 

 heating and plunging material after it had been 

 used for tanning, but has been superseded by hot- 

 water pipes and Oak leaves orCocoanut fibre refuse. 



BARKERIA. 



Description. Epiphytic, deciduous cool-house 

 Orchids (iml. Orchidacea?) of great beauty, now 

 included by botanists amongst the Epidendrums. 



Propagation. By division, just before the new 

 growths begin to push freely. 



Soil. No soil is needed, but the plants should 

 be firmly tied to blocks of wood or wooden rafts. 

 The roots are thick and fleshy, and soon cling to 

 these supports. 



Other Cultural Points. Abundant supplies of 

 water are needed, and during hot weather the 

 rafts or blocks should be dipped in water twice 

 daily. When the plants are at rest, only enough 

 water is required to keep the pseudo-bulbs from 

 shrivelling. They should be suspended close to the 

 glass in the Odontoglossum house when in growth. 



Principal Species : 



elegans, 1' to 1.',', win., 

 dark ro. (wr figure). 



liiidleyaua, 1' to K', Sep., 

 ro., pur., wh. 



Skiiiueri, 1', win., ro. 



Other Species : 



Imdleyana Centera;, win., 



ro.,lfl. 



superbum, 1', win., 



deep ro. Much larger 



than the type, 

 spcctabilis, 1', sum., ro. 



lil. (Epidoiulrum spec- 



tabilo.) 



Aug., 



melanocaulon, 1', 

 ro., pur., lil. 



BARKLYA. 



Stove trees (ord. Legurninosrc). Syringifolia, 

 SO', yellow, is increased by seeds and cuttings in 

 heat. It requires a compost of equal portions of 

 loam, leaf soil, and sand. 



BARLERIA. 



Stove evergreen shrubs (ord. Acanthacete), some 

 of which have flowers of considerable beauty. 

 Propagated by cuttings of the young shoots, in 

 spring, in a warm propagating frame. Loam, 

 peat, and dried cow-manure, in equal parts, witli 

 sand, suit. Baiierias may be had in flower early 

 in the year by striking cuttings the previous spring 

 in the manner suggested, and such cuttings make 

 neat little specimens in 5" or G" pots. The plants 

 may be cut back after flowering, and syringed 

 copiously to encourage free growth. 



Principal Species : 



flava, l.V, Jan., Mch., yel. (syii. gentianoidcs). 



Other Species : 

 buxifolia, 2' ', Jy., wli. 

 cristata, Jy., pur. bl. or 



wh. 



Gibsoiiii, win., pur. 

 involucratn, bl. 

 elata, bl. 



BARNADESIA (tyn. XKNOPHONTA). 



Deciduous shrubs (ord. Composite), requiring a 

 greenhouse temperature. They may be increased 

 by seeds sown in heat in spring, and by cuttings of 

 half matured shoots in April, placed under a bell- 

 glass. A mixture of peat, loam, and sand, in 

 equal parts, is a suitable compost. Rosea, 1-|', 

 May, rose, is a pretty plant, but it is seldom seen 

 in this country. 



BAROMETER. 



Though the excellent weather forecasts pub- 

 lished in the daily papers have induced some 

 gardeners to dispense with a barometer, yet it is 

 an extremely interesting instrument for him to 

 possess ; and if its records are taken down daily 

 they afford very useful means of comparison in 

 the'course of years. The aneroid, a more sensitive 



Jiarley (nee llordeum). 

 Bariiardia (see Scilla). 



liclitcusteiuiaua, 1' to 3'. 

 longiflora, 2', sum., wh. 

 lupuliua, 2', Aug., yel. 

 mitis (.s<r rlava) . 

 Prionitis, 'A', sum., or. 

 repens, Jy. , ro. 



