Fig. 107. Reduced ovules and placentae in parasitic plants; placentae modified, free 

 central types; ovules reduced to suspended or erect lobes; archesporial tissue or 

 embryo sacs near apex of lobes. A to G, showing variety in form of placentae and 

 ovules; A, Thcsium divaricatmn; B, Sai^talum album; C, Comandm umhcllata; 

 D, Thesium wrightianuni; E, Scleropijrum sp.; F, G, Ostjris alba. H, I, N, longi- 

 tudinal sections of flowers showing relation of placentae to ovary walls: H, Olax 

 imbricata; I, Thesium dwaricatum; N, Myoschilos oblonga. J, longitudinal section 

 of an ovular lobe of I showing 2-nucleate embryo sac. K, L, M, Loranthus sphacro- 

 carpits, flower bud with young placenta (nipple), longitudinal and cross sections 

 of portion of the nipple showing archesporial cells, n, nucellus; p, placenta. (A, B, 

 after Schaeppi and Steindl; C, after Ram; D, E, after Rao; F, G, I, J, after Guig- 

 nard; H, after Fagerlind; K, L, M, after Treub; N, after Miers.) 



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