339 



Pacific form at my dis- 

 posal because the ones 

 collected by LIEBMAN 

 most probabl y have 



been kept in J. 

 AGARDH'S Herbarium 

 in Lund, I have not 

 been able to compare 

 the two plants, but I am 

 most inclined to think 

 that BORNET is right. 



The structure of 

 this plant has been 

 examined by FALKEN- 

 BERG, 1. c. 



In its way of grow- 

 ing it bears a close 

 resemblance to Herposi- 

 phonia tenella having 

 a creeping, prostrate 

 main stem with indefi- 

 nite growth from which 

 erect branches arise 

 (Fig. 337 a). The main 

 stem is terete and a 



transverse section 

 shows four pericentral 

 cells. From its ventral 

 side rhizoids are issued 

 downwards ; these often 

 have a long stalk with 

 no walls or a few- 

 ones, ending in a small 

 more or less lobed disc. 



On its dorsal side 

 the main stem carries 

 more or less ramified 

 branches with definite 

 growth and placed in 



Fig. 337. Tsenioma perpusilluin J. Ag. 

 part of a plant, b, upper part of the flat 

 branchlet with basal part of the hairs. 

 (a, about 30:1, b, 270:1). 



22* 



