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PACIFIC SCIENCE, Vol. XIII, January 1959 
Fig. 1, Gulsonia annulata Harvey. Habit of plant showing nodal formation except at base and tips of branches. 
The lateral whorled branches consist of 5 -7 
orders of cells. Cells of the second order are 
formed dichotomously on the basal cell, 
thence each cell of successive orders produces 
a whorl of three cells except the outermost 
which are borne either in two’s or three’s. 
Occasionally the normal terminal cells are 
transversely divided (Fig. 2b). Cells of each 
order are progressively smaller, the terminal 
ones averaging 20 /x long by 6 /x broad. Hairs 
about 300 11 long, with a swollen tip, are fre- 
quently formed from the terminal cells (Fig. 
2b). Reproductive organs, young vegetative 
branches and gland cells are borne on the 
lateral branch whorls. 
Branching of the thallus is irregular, and 
young vegetative branches may occur on any, 
except the oldest, parts of the plant. Fach 
