248 SIR JOHN LUBBOCK ON THE 
pistil is inferior, syncarpous; the ovary of two carpels, one- 
celled, one-ovuled; the ovule basal, erect, and orthotropous. 
Fig. 1. Fig. la. 
Fig. 1. Fruit of Pterocarya. X2.—P, perianth ; W, W, wings. 
Fig. 1 a. Section through the flower of Pterocarya Caucasica. X6.—B, bract ; 
B', B', bracteoles ; Ov, ovule; P, perianth ; St, style; S, S, stigmas. 23rd 
May. 
Fig. la is a section through the young flower at the end of 
May, showing a bract B at the base, two bracteoles B' B' at the 
sides, the ovule Ov, perianth P, and S S the two large, spreading, 
papillose stigmas. The cavity of the ovary is small and nearly 
filled by the ovule. 
Fig. 2 
Section of Fruit. June 25. x6. 
Co, Co, two places where the tissue has become colourless. 
By about the middle of June the young fruit had grown con- 
siderably in thickness, though not much in length. The ovary 
and ovule are longer, and at the base of the former the tissue 
has in two places (fig. 2, Co, Co) become almost colourless from 
the removal of the protoplasm. 
