340 TKANSACTIONS AND rUOCEEDINGS OF THE [Sess. lxiv. 



Styles, as well as the extent of the ovarian keel, and the 

 attachment thereto of the style, are all diagnostic points. 



A comparison of Figs. 17 tp 23, which are outline 

 drawings of pistils, will bear out this statement. Thus, 

 Hookeriana has a short thick style less than twice the 

 length of the ovary, of fairly uniform diameter throughout 

 its length, expanding suddenly at the apex into a screw- 

 nail head like stigma. LacinUmi, again, has the ovarian 

 wall longitudinally ridged and furrowed ; a keel all round, 

 most pronounced on the ventral border ; a marked basal 

 contraction of the style where it joins the keel. Bupestris 

 has a characteristic .sub-basal insertion of the style, which 

 is spindle-shaped, contracted at apex and base where it 

 adjoins the stigma and ventral keel of the ovary 

 respectively. The length of the style of the Kurdica 

 is characteristic, being many times as long as the ovary, 

 and tapering apically into a discoid stigma, its surface is 

 mamillated. Viscosa has a sliort style again, only about 

 one and a half times the length of the ovary, tapering 

 apically. Further, the ovary has viscid glandular hairs. 



KXPLAXATIOX OK THH FKiURES. 



1. Diagram illusti'atiiig vascular supply of (lower. — cp.z= epicalyx 

 segments ; .scj). — sepal ; jict. = petal ; n. = nectary. The supply of one 

 sepal and one epicalyx segment is shown in detail. 



2. Left half of a young flower of P. Schriikidna. — e. ■■= epicalyx ; 

 .S-. = sepal; p.= petal. Leitz., Oc. ;>, Obj. 3. 



•}. Transverse section of ovarian wall. — j). — outer parenchymatous 

 layer ; c. = crystallogcnous layer; .s. — schrenchyma layer. Leitz., Oc. 3, 

 Obj. 7. 



4, ;"), and G. Diagrams of types 4, .">, and (I of staminal arrangements. 

 The epicalyx segments are omitted. 



7. Half of a transverse section of style in the u])per third. Leitz., 

 Oc. ;5, Obj. 7. 



H. Half of a transverse section of style near its base. — e.g. = ventral 

 groove; /'./! = swollen epidermal pigment cells forming basal Ihmge ; 

 •s.r. = stylar vessels. Leitz., r)c. 3, Obj. 7. 



0. Stamen, showing anflier and upper ])art of lilament. Oc. .'5, Obj. 

 2 in. 



10. Transverse .section of filament. Leitz., Oc. 3, Obj. 7. 



11. Transverse section of inmiatnre anther.— /). = pigment cells. 

 Oc. 3, Obj. 7. 



12. Diagrammatic vertictal section of Hower, showing vascular supply 

 of gynophore and pistils. — s. = sepal ; c/). = epicalyx ; p. = petal ; 

 .it. = stamen ; n. = nectary ; h. = hairs ; ]>.v..'<. — origin of vascular 

 bimdle of petal. 



