ORE 



[ 453 ] 



GUI 



onions and a few others evolve phos- | 

 phorus ; hydrogen, carbonic acid gas, j 

 and carburetted hydrogen gas, with ' 

 various vegetable matters, are almost ; 

 always abundantly formed. All these | 

 gases wlien mixed with the soil are \ 

 very nourishing to the plants growing j 

 upon it. The observations of the 

 farmer assure us that they are so. He 

 tells us that all green manures cannot 

 be employed in too fresh a state. 



8ca Weed is a species of greeu ma- 

 nure, for it ought to he employed whilst j 

 quite fresh. There are many species, 

 and they differ very essentially in. their 

 components. The Lumiinaria, those 

 long, tawny-green, ribbon-like algaa, so 

 common 011 our coasts, contain besides 

 vegetable matter a large proportion of 

 the salts of potash in addition to those 

 of soda ; whereas the Fuel contain none 

 of the salts of potash. All, however, 

 are excellent manures, and we know a 

 garden, near Southampton, very pro- 

 ductive, that for some years had no 

 other manure. It is particularly 

 good as a manure for potatoes. The 

 ^HCUS vexictilosits, so distinguishable by 

 the bladders full of air embedded in its 

 leaves, is a very excellent manure. It j 

 contains, when dry, about eighty-four j 

 parts vegetable matter, thirteen parts ' 

 sulphate of lime and magnesia, with a 

 little phosphate of lirne, and three parts 

 sulphate and muriate of soda. 



GREXVI'LLEA conspi'cua. This is Pc- 

 largo'ninm conspi'cuum. ,nn rnyorg \ 



GREENWEED. Geni'sta pilo'sa, and 

 tincto'riu. 



GREVI'LLEA. (Named after C. F. 

 Greville, a patron of botany. Nat, ord., 

 Proteads [Proteacere]. Linn., -Tetran- 

 dna 1-Monogynia. Allied to Hakea.) 



Greenhouse evergreen shrubs from New Hol- 

 land. Seeds sown in a slight hotbed, in spring, 

 or in the greenhouse, as soon as ripe ; cuttings 

 of the young shoots when ripened, in sand, 

 under a bell-glass, and when callused at the 

 base to have a slight bottom ; peat and loam, 

 with silver sand, and bits of charcoal, to keep 

 the soil open. Winter temp., 35 to 45. Ros- 

 tnarinifolia and acuminuta have stood out in 

 sheltered places, with little or no protection. 

 G. aca'nthi folia (Acanthu8-leaved\ 4. Purple. 

 June. 1824. 



acumina'ta (pointed - leaved). 4. Red. 



April. 1805. 



aqutfo'lia (Holly-leaved). 1820. 



~ d'ftpera (rough). 3. Pink. June, 1624. 



G. asplenifo'lia (Asplenium-leaved). 5, Pink. 

 July. 1806. 



Bnue'ri (Bauer's). 4. Red. June. 1824. 



berberifu'lia (Berbery-leaved). 4. Red. June. 



J821. 



bipinnati'fida (doubly-leafleted). 1837- 



brachya'ntha (short-flowered). Purple. 



buxifo'lia (Box-leaved). 6. Pink. June. 



1790. 



Cale'yi (Caley's). 5. Red. June. 1830. 



cane'scens (hosty-leaved). 5. Green, tawny. 



1824. 



ceratophy' Ha (horn-leaved). 1839. 



cine'rea (ashey-coloured). 4. Red. June. 



1822. 



colli'na (hill). 4. Pink. June. 1812. 



conci'nna(nent). 4. Purple. June. 1821. 



eriosta'chya (woolly-spiked). Orange. 



ferrugi'nea (rusty). 3. 1837- 



Flinde'rsii (Flinder's). 3. Purple. June, 



New South Wales. 1824. 



gibba'sa (swollen-stemmed) . 1821. 



heterophy'lla (variable-leaved). 4. White. 



June. 1821. 



juniperi'na (Juniper-like). 4. Pink. June. 



1822. 



Lawrenceu'nu (Mrs. Lawrence's). White. 



183Q. 



linea'ris (narrow -leaved). 6. White. June. 



1790- 

 a' Iba (white-flowered). 4. White. 



June. 1/90. 

 incarnu'ta. (flesh-coloured). 4. 



Flesh. June. 1/90. 



longifo'lia (long.leaved). Reddish yellow. 



May. 



Mangle' sii (Mangles's). 



monta'na (mountain). 4, violet. June. 



1822. 



mueronifo'lia (pointed-leaved). 3. Violet. 



June. 1824. 



mucronula'ta (small -pointed -leaved}. 4. 



Pink. June. 1809. 



~-planifo'lia (flat-leaved). 2. Orange. June. 

 *823. 



puni'cea (scarlet). Purple. June. 1822. 



robu'sta (robust, or silk-oak). 5. Orange. 



June. 1829. 



rosmarinifo'lia (Rosemary-leaved). 4. Red. 



June. 1824. 



seri'cea (silky). 6. Pink. June. 1790. 



stri'cta (erect). 4. Pink. June. 1820. 



stylo'sti(long-styleA). 9. Red. June. 1809- 



sulphu'rea (sulphur-coloured). 4. Pale yel- 



low. June. 1824. 



Thielemania'na (Thielemann's). Crimson. 



1838. 



trifurca'ta (three-forked). 3. Red. June. 



1821. 



GEI'AS. Anchovy Pear. (From grao, 

 to eat; the fruit being eatable. Nat. 

 ord., Barrlnytoniads [Barringtoniacese] . 

 Linn., 13-Polyandria \-Monoijyniu. Al- 

 lied to Gustavia.) 



Stove evergreen tree. Cuttings of ripe shoots, 

 in sand, under a bell-glass, in peat ; rich sandy 

 loam. Summer temp., 60 to 80; winter, 50 

 to 55. 

 G. cauliflo'ra (stem-flowering). 50. White; 



Jamaica, 1768. 



