BY AGNES A. BREWSTER. 755 



the stigmatic siirfaeej with the development of about a dozen 

 of the protuberances into elongate, inverted, flask-shaped hairs, 

 which contained a red fluid, and stood out above the colourless, 

 rounded projections. These coloured outgrowths are probably the 

 secretory hairs of the stigma. 



The flower-clusters in most cases become red-tipped as they 

 mature; even if they are not quite red, the style will be seen to 

 become pink, and the corolla-lobes will have a pink streak here 

 and there. I have seen many of these red clusters, in the latest 

 period of their development, wet and shining with the overflovv^ing 

 nectar secreted by the surface of the ovary. Another interesting 

 feature is, that the flower-clusters show a marked, initial zygo- 

 morphy of the inflorescence. Mr. John McLean Thompson, M.A., 

 B.Sc, in a paper published in the Transactions of the Royal 

 Society of Edinburgh (Vol. xlix., 6, 691), entitled, "Studies in 

 Floral Zygomorphy," states that : "When any member of a cycle of 

 floral parts shows a definite tendency to reach a developmental stage 

 in advance of the remaining members, or to have the attainment of 

 a developmental stage delayed, zygomorphy is initiated. The zygo- 

 morphy may be only temporary, in which case morphological acti- 

 nomorphy may be restored." 



The individual flowers of B. fascieularis exhibit initial, pistillate 

 zygomorphy, and there is a marked initial zygomorphy of the 

 inflorescence; for, in almost every cluster, there is a distinct zone 

 of mature, or almost mature flowers, representing roughly one-half 

 of each cluster, while the other half is in bud, or in various stages of 

 early development. An examination of over ninety flower-clusters, 

 on plants in various districts, showed that the flowers develop one 

 after another, but that, about half-way in the development of the 

 cluster, there is a distinct zone of aMost mature, closed flowers; 

 while, in the other half, the flowers are young or in bud. At this 

 stage in the growth of the cluster, the flowers are usually all 

 white, or the zone of maturer development is becoming pink. The 

 individual flower, at its maturity, establishes morphological acti- 

 nomorphy; and, later, the morphological aetinomorphy of the 

 inflorescence is attained. 



