401. 
Fam. 12. Bonnemaisoniacex. 
Bonnemaisonia C. Agardh. 
1. Bonnemaisonia asparagoides (Woodw.) Agardh. 
C. Agardh, Spee. Algar. 1821, p. 197; Harvey, Phycol. Brit. I, 1846, pl. 51; J. Agardh, Spee. g. o. Alg. II, 
pars III, 1863, p. 779; Cramer, Physiol.-system. Unters. üb. die Ceramiaceen. Neue Denkschr. d. 
allg. schweiz. Ges. f. Naturw. 20. Zürich 1864, p. 52, Taf. VIII, figs. 4—11, X, figs. 1—12; Kützing, 
Tab. phye. 15. Band, Taf. 32, 1865; Wille, Beitr. z. Entwick. d. phys. Gew. b. ein. Florideen. Nova 
Acta Leop.-Carol. Akad. 1887, p. 73, figs. 44—54; Golenkin, Algologische Notizen. Bull. soc. nat. de 
Moscou, N. S. VIII, 1894, p. 257; Bruns, Ber. deut. bot. Ges. 12, 1894, p. 179; Phillips, Developm. 
of the cystocarp in Rhodymeniales. Ann. of Botany, Vol. XI, 1897, p. 348, pl. 17 figs. 1—3; Kylin, 
Blasenzellen einig. Florid., Arkiv för Botanik. Bd. 14 No. 5, 1915; id., Entwicklungsgesch. u. syst. 
Stell. von Bonnemaisonia asparagoides. Zeitschr. f. Botanik VIII, 1916, p. 545; id., Über die Keimung 
der Florideensporen. Arkiv för Botanik, Bd. 14, No. 22, 1817, p. 12. 
Fucus Asparagoides Woodward, Trans. Linn. Soc. Vol. II p. 29, 1794. 
The structure and development of the alternately pinnate frond has been de- 
scribed by CRAMER, WILLE and Kyrın (1916). GoLENKIN, Bruns and Kyrın (1915) 
have described peculiar gland cells situated among the cortical cells and contain- 
ing a compound of iodine which is easily decomposed, producing free iodine. I 
have also observed, many years ago, the power of the species of giving a blue stain 
to paper. — According to Kyrın (1916, p. 549), rather short unicellular hairs may 
occur sparingly. 
Tetrasporangia are wanting; all specimens are monoecious sexual plants. The 
sexual branchlets are alternate, opposite to the alternate sterile pinnule. The an- 
theridia are produced on the surface of the oval male branchlets (Kyrın 1916, p. 551). 
The carpogonial branches develop singly on the female branches. Their development 
and that of the cystocarps has been followed by Kyrın (1916) who has found that 
it most resembles that of Wrangelia and Naccaria. OLrMANNs and Ky win think 
that this group of genera makes transition from the Nemalionales to the Cryptone- 
miales and the Gigartinales. The germination takes place, as shown by GOLENKIN 
and Kyrın (1917), by the formation of a basal disc, from the margin of which 
numerous rhizoids are given off. The formation of the erect shoots were not observed. 
As emphasised by Kyrın, this mode of germination is very different from that of 
the Rhodomelaceæ to which the Bonnemaisoniaceæ have been considered related. 
The species is annual. It has only been found rarely in a few localities in 
the northern and eastern Kattegat, in 18 to 24,5 meters depth, growing on various 
Algæ (Delesseria sanguinea, Polysiphonia elongata, Laminaria saccharina). The largest 
specimen observed (from Herthas Flak) was 13 cm long. Collected with ripe cystocarps 
in July and September. 
Localities. Kn: Herthas Flak (!, Børgesen). — Ke: VZ, Groves Flak, VY, Fladen. 
