BLO 



[ 138] 



BOI 



BLOOM. This term is also applied to 

 the fine exudation on the surface of some 

 fruit purple on the Black Hamburgh 

 Grape, and on some plums, and green on 

 the cucumber. It so improves their ap- 

 pearance that an apparatus has been 

 suggested for adding it artificially. It 

 seems of a resinous nature. 



BLUE-BELLS. Campanula, 'rotundifo'lia. 



BLUE-BOTTLE. Ccntau'rea cy anus. 



BLUETS. Vacci'nium angustifd Hum. 



BLUMENBA'CHIA. (Named after /. F. 

 Jilumenbach) of Gottingen. Nat. ord., 

 Loasads [Loasacese], Linn., 18-Polya- 

 delphia, 2-polyandria). Hardy annuals. 

 Seeds in April ; rich mould. 

 j5. insi'gnis (remarkable), f. White. July. 

 Monte Video. 1826. Trailer. 



multi'fida (many-cleft-Ze0erf) . 1 Greenish 



red. July. Buenos Ayres. 1826. 



BOATLIP. Scaphyglo'ttis. 



BOBA'RTIA. (Named in honour of 

 Jacob Bobart, Professor of Botany at Ox- 

 ford in the seventeenth century. Nat. ord., 

 Irids [Iridaceael. Linn., Z-Triandria, 1- 

 monogynia}. The species in this genus 

 should have been united to ARISTEA. 

 Seeds in April ; divisions in autumn or 

 spring. Sandy loam ; protection of a 

 cool greenhouse or pit in winter. 

 J?. auranti'aca (orange), f . Orange. March. 

 Belgia. 1827. Hardy perennial. 



gladia'ta (sword-shaped). 2. Yellow. June. 



Cape of Good Hope. 1816. 



spatJia'cea (sheathed), f. Yellow. June. 



Cape of Good Hope. 1798. 

 BOCCO'NIA. (Named after P. Bocconc, 

 M.D., a Sicilian. Nat. ord., Poppyworts 

 [Papaveracese]. Linn., \\-Dodecandria, 

 \-monogynia). Stove evergreen shrubs. 

 Cuttings in sand and heat ; fibry sandy 

 loam. Summer temp., 60 to 80 ; win- 

 ter, 55 to 60. 



JB.frutc'scens (shrubby Celandine). 10. White 

 yellow. February. West Indies. 1739. 



intcgrifo'lia (entire -leaved). 4. White. 



February. Mexico. 1820. 

 BCE'BERA. (Named after JBcebcr, a 

 Russian botanist. Nat. ord., Composites 

 [Asteraceae]. Linn., 19-Synffcnesia, 2- 

 superflua). A greenhouse evergreen 

 shrub. Cuttings of young firmish shoots 

 under a glass ; requires a pit or a cool 

 greenhouse in winter. 

 B. inca'na (honry-hcrbagcd). li. Golden. 



Mexico. "1828. 



There arc other species, but not deserv- 

 ing cultivation. 



BOG-BEAN.. Menya'nthes trifolia'ta. 

 BOG-EARTH. Heath-mould, or Peat. 

 By gardeners this is understood as not 

 meaning that mass of moss or sphagnum 

 dug out of wet fenny places for fuel, but 

 a sharp, sandy soil, mixed with the dead 

 fibrous roots of heath, and usually of a 

 dark grey colour, such as is found upon 

 the surface beneath the heath on Wimble- 

 don, Bagshot, and many other dry com- 

 mons. Peat of the best description is 

 thus constituted. Of 400 parts : 

 Fine silicious sand . . .156 

 Unaltered vegetable fibre . 2 

 Decomposing vegetable matter . 110 

 Silica (flint) . . . .102 

 Alumina (clay) . . .16 

 Oxide of iron .... 4 

 Soluble vegetable and saline 



matter .... 4 

 Muriate of limo ... 4 



Loss 2 



BOG EARTH PLANTS. See American 

 Plants. 



BOG-MOSS. Sphagnum. 

 BOILER. The vessel employed to sup- 

 ply the pipes or tanks with hot water 

 or steam, when either of these are used 

 for heating purposes. Many are the in- 

 genious and intricate boilers from time 

 to time offered to the gardener ; but, 

 after much experience with boilers of all 

 descriptions, we can confidently say the 

 most simple is the best. The smaller 

 the boiler and the fire-place, compatible 

 with efficiency, the greater is the eco- 

 nomy. We can tell the gardener also, 

 most decidedly, that the total size of the 

 boiler has nothing to do with that effi- 

 ciency ; the only point to be secured is, 

 that a sufficient surface of the boiler be 

 exposed to the fire. The following table 

 shows the amount of boiler surface 

 which must be exposed to the fire to 

 heat given lengths of pipe, respectively 

 4 inches, 3 inches, and 2 inches in dia- 

 meter. 



