F, foundersecond bud, which usually polyp; I, 2, 3, succession of polyps forms a side branch or pinnule budded from the founder.
Or a polyp on the main stem, after having budded a second time to form a pinnule, may give rise to a third bud, which starts a new biserial FIG.
Polyp 7 has proof sense, 1 o c oduced as its first bud, 8; as its second bud, a7, motion and nutriwhich starts a uniserial pinnule; and as a third t i on, until its bud I', which starts a biserial branch (I I'-VI') medusoid nature that repeats the structure of the main stem and and organization gives off pinnules.
Ct, Swollen pinnule forming, a s, Sense organ.
T, Pinnule bearing 8 synangia.
I, Fertile pinnule, nat.
Section of pinnule and synangium.
Fertile pinnule, bearing several tufts of microsporangia, magnified.
Each fertile pinnule bore six, or rarely seven fusiform microsporangia, described as bilocular: not improbably each may represent a synangium.
Rhizomes have been found by Dr I 4, Single fertile pinnule slightly C. Bommer of Brussels in some enlarged.