I40 BOTANICAL GAZETTE [august 



Fig. 24. Blepharoplasts in contact. X 1400. 



Fig, 25. Spindle in body cell, showing some of the chromosomes; blepharo- 

 plasts beginning to form band, X 750. 



Fig. 26. Diagram of nucellus showing several pollen tubes; lo^yest one show- 

 ing the descending portion in which the sixteen sperms are formed. X15. 



Fig. 27. Pair of mother cells formed from body cell; near wall may be seen 

 fragments of blepharoplasts, X750. 



PLATE XII 



Fig. 28. Descending tip of pollen tube in which are fifteen sperms in process of 

 formation; top of spiral of one is shown, and the beginnings of spiral bands in 

 two others; to the left is the tube nucleus. X450. 



Fig. 29. Pollen tube containing sixteen sperms, two of which show merely 

 the tip of their spiral bands; it was not possible to discover in this tube the usual 

 haustorial branch that ascends into the nucellus, all development having appar- 

 ently taken place almost within the limits of the old microspore; intine unusually 

 heavy and somewhat broken; growth in the direction of the archegonia. X180. 



Fig, 30, Sperm seen from above. X750. (Plate XL) 



Fig. 31. Part of ciliated band showing two regions and cilia arising from 

 darker one. X1400. 



Fig. 32. Diagram of cross-section of o\aile, made from cross-section about 

 one-third its length from micro pylar end. X3. 



Fig. 33. Diagram of an archegonium. X75. 



Fig. 34. Archegonium, showing central cell and one neck cell. 



Fig. 35. Tip of archegonium; neck cells absent or broken down. X750. 



Fig. 36, Archegonium containing three nuclei, probably resulting from union 

 of three archegonia; neck cells absent or broken down. X750. 



Fig, 37. Archegonium containing three nuclei, probably resulting from union 

 of three archegonia. X270. 



Fig. 38. Diagram of section of two archegonia, the two having the form of 

 one, but still separated by wall. X270. 



Fig. 39. Cross-section of an archegonium containing two nuclei. X270. 



Fig. 40, Two young embr}'os, their suspensors so closely attached as to be 

 indistinguishable above, but separated below; at top is mass of old archegonia 

 from one of which the embryos are growing. X2. 



Fig. 41. Older embryos growing from mass of old archegonia; the longest 

 suspensor measured 8*^ in length; two suspensors growing upward from the 

 archegonia were closely appressed to the gametophyte immediately beneath the 

 nucellar cap. Xj. 



Fig. 42, Endosperm (seed coats removed) containing an embr}^o; cotyledons 



spirally twisted, a feature not present in most seeds examined. X i- 



Fig. 43. Germinating seed. X 



Fig. 44. Young plantlet resuming growth after having been transplanted; 

 stem in same position as found in nature; at its top are scale-like growths which 



