342 KiRKWoop: POoLLEN-TUBE IN CUCURBITACEAE 
Description of plates 16 and 17 
PLATE 16 
- Diagrammatic figure representing longitudinal section seit gynoecium of 
Melothria Course of pollen-tube (P. ¢. intercellular. 
2. a, 6,¢. Pollen-tube showing pl ; 
3. Longitudinal section through pices of Micrampelis. Conducting-tissue 
shaded. 
vary of same at right angles to figure 3. 
5. Longitudinal section through ovary of Cyclanthera, showing path of pollen- 
tubes. 
6. Diagram of micropylar region of ovule of Cyclanthera, showing dilation of 
pollen-tube, P. ¢ 
7- Ditto, MWelothria 
8. Ditto, Mcrampelis. 
PLATE 17 
9. Conducting-tissue of AMelothria on placental folds. Pollen-tube in transverse 
section. O. 
10. Conducting-tissue on funicle of ovule of Melo hria. >< 440. 
Bi eh esate ath: tissue of Micrampelis. Transverse section of pollen-tube. >< 44 
13. Transverse section stew ea neck of nucellus, in Cyclanthera, before and 
whe passage of pollen-tube, P. ¢ : 
onducting-tissue in ovary of Gpelaiathete: P., placenta ; o. bat ovary-wall 
oe ge of pollen-tube. 440. 
- Same showing pollen-tube (?. ¢.) passing under some cells of conducting- 
tissue. >< 440 
