NOTES 
C3ST APOSPORY AND PRODUCTION OF GEMMAE IN 
TRICHOMANES KAULFUSSII, Hk. and Gr. —In the first 
volume of the Annals of Botany 1 I described how outgrowths may 
appear on the margins, and even on the surface, of the fronds of 
Trichomanes alatum , Swartz. These take the form either of ribbon- 
like bodies, or of filaments, and it was concluded that they were of 
the nature of prothalli produced by aposporous growth, since they had 
the characters of the Hymenophyllaceous prothallus, and even bore 
antheridia ; the dark brown rhizoids were a marked feature on the 
filamentous growths. A further notable character was the production 
of numerous gemmae, similar in form to those previously described 
by Cramer 2 , and by Goebel 3 , on prothalli of Hymenophyllaceae. 
On a very fine plant of Tr. Kaulfussii , Hk. and Gr., growing at 
Kew, I recently found outgrowths of a similar nature to those of Tr . 
alatum , produced in prodigious quantities ; the leaves which bear 
them appear to be destitute of sporangia. I have only noted fila- 
mentous outgrowths in this species, none developing into flattened 
expansions, as so frequently occurs in Tr. alatum. It is to be noted 
in this connexion that the plant was grown in a closed case in a 
densely shaded position, and it has been recently shown by Klebs 4 
that in other ferns cultivation in weak light induces filamentous 
development, and frequent adventitious branching ; in fact, just such 
developments as were found on the Kew plant of Tr. Kaulfussii. 
The filamentous growths originate from single marginal or superficial 
cells of the frond, and bear lateral rhizoids of a dark brown 
1 Preliminary note, Annals of Botany, Vol. i, p. 183. Full description with 
Figures, 1 . c., p. 278. 
2 Denkschr. d. Schweitz. Nat. Ges. XXVIII, 1880. 
3 Ann. Jard. Bot. d. Buitenzorg. Vol. vii, p. 72. 
4 Biologisches Centralblatt. Bd. XIII, p. 641, &c. 
