2 1 2 Mr. Griffith on the Ovulum o/'Santalum, 



are shown to be percursed by the pollen tubes. These passing out from the albu- 

 men at b, b, inclosed, as it were, in a cellular case, become confluent at c, and then 

 form the funicle of the embryonic tissue, d. The green hook visible above this 

 shows, I think, a tendency to the formation of a second embryo. 

 Pig. ."). A mass of albumen and embryo removed out of the ovarium of a young fruit 2£ lines 



in length. The embryo is seen to project beyond the lower edge of the albumen. 

 Fig. (I. Longitudinal bisection of a young fruit, rather more advanced. The mass of albu- 

 men is seen to be hollow, the cavity being occupied by the embryo and its twisted 

 funicle, the point of attachment of which to the embryo is shown at a, a. The 

 dense obconical base at this period is nearly inclosed in the albumen (although 

 this is not represented), and it does not now separate with the embryo, as it did 

 previously. 

 ; . Represents an occasional occurrence of two young albumina remaining distinct to a 

 tolerably late period. 



Tab. XX. 



Loranthus bicolor. 



Fig. 1. Longitudinal section of the base of a bud If line long, a, a. Calyculus. b, b. Sepals. 

 c. Cavity of the pistillum. d. Elevated fundus of the cavity, e. Dense sublunu- 

 late spot of tissue. /,/. Vascular supplies of perianthium and stamina. 



Fig. 2. Longitudinalsectionofthebaseofabudl2Uneslong. a, a. Calyculus. b, b. Sepals, 

 c. Cavity of the pistillum. d. Elevated fundus seen through the brownish tissue 

 of base of ovarium, e. Dense sublunulate spot. /,/. Vascular supplies of peri- 

 anthium and stamina. 



Kg. 3. Longitudinal section of ovarium of a flower before expansion, but fully formed. 

 * Calyculus. b. Sepals, c. Centre of ovarium, now of brownish subamorphous 

 tissue occupied by four embryonary sacs, three of which are continued up the 

 s.gmat.c canal (it is the brownish tissue which obscures so much the original 



Fi,4 j'7 ted t fu " du8 "» i PP k )- »• Dense lunulate spot. ., .. Vascular supplies. 



H,. ,. L„„ er part of embryonary sac of the same , the dilated part is that contained in the 

 ovarium ;— ^ y measured. 



Fig. 5. Head and upper part of an embryonary sac, from the same period, found IX inch 

 up the st.gmat.c canal ; it is crowded with grumous matter ;_ J. measured 



Fig. 6. Head of an embryonary sac, after fecundation I. »• . " ° meaSured - 



.„,„ ■ . . / , > alter,ecunaa t'°n. It contains two inner bags prolonged 



"7 - tut -.;nd yet only one po.len tube is seen to penetrate. 

 ... 7. 1 art of an ovanum from a flower shortly after the fall of the perianthium. The style 

 s ft. S cou s throughout the iower half, and tinged with red throughout the upp 

 half. In the spec.men d.ssected there were three sacs (only Z, however, are 



