NOTES 
NOTE ON AN ABNORMALITY FOUND IN PSILOTUM TRIQUETRUM. 
—The following note is a description of an unusual structure remarked by Dr. Benson 
in a dried plant of Psilotum triquetrum , sent her from New South Wales. My thanks 
are due to Dr. Benson for kindly allowing me to describe and figure this structure. 
Some distance from the apex of the plant there occurred, among the ordinary 
synangia, a cluster of four synangia borne together on a common stalk. Three of 
these synangia were bilocular, while the fourth was unilocular. Diagrams I, II, III, 
IV, represent front, side, and back views of the cluster, and show the four synangia 
(A, B, C, D) with two forked bracts (x 1 , x 2 , y 1 , y 2 ) and one single bract ( z ). 
Diagrams I-IV. Cluster of synangia in various positions (letters as in Diagram V). 
Diagram V. M = main axis ; S = common stalk, bearing cluster of synangia, the dotted portions 
represent the intemodes, elongated for the purposes of the diagram; A, B, C, D == synangia; 
x, y, z — bracts. 
On dissection it was found that no further bracts were present. The common 
stalk was flattened and was about a quarter of an inch in length. It bore, first, 
a bilocular synangium (A) with a double bract (x l , x 2 ) ; secondly, a similar synangium 
with its double bract (B, with y 1 , y 2 ); thirdly, a bilocular synangium (C) with a 
single bract (z) ; and finally it was terminated by a unilocular synangium (D) 
destitute of bracts (see Diagram V). Each of the first three synangia with their 
bracts was almost sessile, but the terminal synangium occurred at the end of a 
comparatively elongated, and also much curved, portion of the common stalk. 
[Annals of Botany, Vol. XXII. No. LXXXVII. July, 1908.! 
