13G 



MEMOIRS OF THE KEW YORK BOTANICAL GARDEN 



PLATE 21 



Figure 52. Sfigoncma congcsium 



Tlie younger parts of a typical plant x 500 



" 53. Stigonema cormdum 



To the right, a typical plant, showing hormogo- 

 niferons branches; to the left, a typical older 

 plant free from hormogoniferous branches x 250 



" 54. Stigonema ramosissimum 



Upper part of a typical i^lant _ x 250 



" 55. Stigonema tuberculatum 



Upper part of a typical plant x 250 



