74 



II(»\V I'LANTS AHK rUOrAOATKn. 



»• 



it 



t'liiiilioiiinl Pibtlls of t\v 1 ami tlili i' n:;;.-*, 



iil»()Vo and hclou). Fi-,'. i.S(). pistil of Coimnon St. .lohn's-wort, plainly conipof-ed 

 of tlii't'O Kiujplo ones, vvitli tlicir ovjiiirn (•()niph'l4'ly united, wliilc tlu-ir hlcuder 



IHtvh's uro soparato, Ki^'. 190, saino 

 of SliiMd)l)V St. .lohn's-wort, like tlio 

 last, hut with tilt' three* styles also 

 ^M'ow n to^jethel' iiil<» one, (lie littlo 

 sti^'iuas only separate ; hut as it^'cts 

 older this stylo <;eneially splits down 

 into three, and when the pod is >ipo 

 it also splits into thi('»', [d linly show- 

 '^^"^^ iii<,' that this couipound pistil con- 

 sists of three united into one. On 

 turniufj now to I*'!",'. 8 and Fi<;. 10 

 to 12 on the same pai;e. it will ho 

 seen that the j>istil in .Mornin<,'- 

 (llory and in Lily is a conipouiul 

 one, made of three united even to their stiuMuas. This is shown externally hy tho 

 8ti<.(ma hein;; som<>whiit threedolu'd in hoth. And it Itecomes perfectly evident 

 on cutting tho ovary in two, hrin<jin,<,' to view the three cells ( Fi^L,'. i.", as in Fi<5. 

 189, 190), t'lich answerin*; to one simple ovnry. 



216. So compound ovaries generally have as nniny cells as there 

 are simi)le pistils or ])isl il leaves in their composition ; and have tho A 1^ 

 p'arrnfax (ic)()) hearing the seeds all joined in the centre: that is. the /\ /A 1 jvi 

 jil'K'riitdx or compound plwrnlti in Ihc axix. But sometimes tho |fK'\^^'IJ\% 

 'ji irli/ioiis or divisions hetween tho cells vanish, as in Pinks : then [' /, 

 the compound pistil is only one-celled. And sometimes there never 

 were any partitions ; hut the pistil was formed of two, 

 three, or more open ])istil leaves gi-own together from 

 the lirst hy their edges, just as petals join to make a 

 monopetalous corolla. Then th»> ovules or .soed.s, or 

 the plarniitaa that bear them, are /laridal, that is, are 

 borne on tlie parictes or wall o^ the ovary. Fig. 191 

 is the lower part of a compound ovary, with three ^>a- 

 r/V'/rt/ jVar-f/z/rw or seed-bearing lines ; and Fig. 192 is j-meiai. 



a diagram, to explain how such a pistil is suppo.sed to be made of three leaves 

 united hy their edges, and these edges bearing the ovules or .seeds. 



Oiie-cellcil coinimiinil ovary, witli placonta* 



