1895,] Antidromy in Plants. 973 
5. Colonies of Aglaophenia sp. showing (a) terminal exten- 
sion of stem; (b) terminal hook ; (c) clasping of hooks; 
(d) budding of hooks; (e) new colony attached to side of 
jar and to parent stock. 
6. Clasping hooks, magnified. 
: ANTIDROMY IN PLANTS. 
By G. MACLOSKIE. 
In November, 1893, I published observations on Maize, from 
which it appeared that there are two castes of this plant, the 
leaves of one reversing the arrangement of those of the other. 
I also traced this diversity to the arrangement of the minute 
leaves in the young embryo in the seed; thus in figures 1, 2, 
the first foliage-leaf has its right margin 
overlapping its left margin. In other 
seeds from the same ear the first leaf 
would have its left margin external. I 
further found that the grains arising on 
adjoining rows in the ear of corn are of 
fe different castes, and produce “ antidromic” 
Grain of Maize; cross Š f z ; 
any plants (that is, growing up in opposing 
curves), and that the same property be- 
longs to all the Graminee. 
During the past summer I have ex- 
tended this law so as to embrace the 
flowering plants. Every species is repre- 
Fig. 2. sented by two sets, differing antidromic- 
Young leaves of Plu- ally as to the structure of the mother- 
mule of Maize. seed, the stem, leaves and inflorescence. 
My attention was first attracted to this in the Ladies’ Tresses 
(Spiranthes preecox Watson), which had, in some plants, dextral, 
in others sinistral, rows of white flowers; and on examination 
the dextral and sinistral anthotaxy were found to be accom- 
panied respectively by dextral and sinistral phyllotaxy. Fig. 3, 
wart 
