IX. ALG M. 
647 
Frustules few, convex, connate into a stalked flag-shaped frond . 113. Achptanthes. 
Frustules in longitudinal series 114. Schizonema. 
Teibe XIII. Palmellese. Frond green red yellow or orange, composed of separate 
globose or ellipsoid cells, free or in a gelatinous matrix. Propagation by division of 
the cell contents. — Some of the most simple forms of vegetables belong to this tribe , in- 
cluding the Red Snow of the Arctic regions, which has not hitherto been found in the 
southern hemisphere. The species have never been collected in New Zealand. 
SUBORDER I. MELANOSPERMEiE. 
1. SARGASSUM, Agardh. 
Hoots scutate. Frond olive-brown, pinnately decompound, with distinct 
stem, midribbed branches, leaves, bladders, and receptacles. Bladders 
stalked, supra-axillary, simple, usually pointed or terminated by a leaf. 
Receptacles pod-like, axillary, solitary or fascicled, tubercled or moniliform; 
tubercles porose, answering to the immersed conceptacles, which contain 
tetraspores and tufted untheridia. 
A large tropical genus, rarer in temperate and colder seas. The Gulf-weed (S. bacciferum) 
belongs to it. 
§ 1. Pteeophycus, J. Ag. — Stems flattened, ribbed. Leaves parallel to the stem. 
1. S. longifolium, Agardh; — FI. N. Z. ii. 212. Frond 4 feet and up- 
wards long. Stem flat, spirally twisted at the base. Leaves marginal, 5-6 
in. long, linear-lanceolate, serrate, costate, lower dichotomously pinnatifid. 
Bladders spherical or ellipsoid, terminated by a leaf. Receptacles panicled, 
ovoid, unarmed. — J. Ag. Sp. Alg. i. 283. Anthophycus, Kuetzing. Fucus, 
Turn. Hist. Fuc. t. 104. ’ 
Shores of New Zealand, Panics and Solander, D’Urville. (South Africa, Indian Ocean.) 
§ II. Arthbophycus, J. Ag. — Stems flattened, angular or 2-%-edged, branches bent 
down at their insertion. Leaves horizontal, owing to a twist at their base. 
2. S. plumosum, A. Rich. ; — FI. N. Z. ii. 212. Frond 1-2 feet long. 
Stem flat, distichously pinnate, hardly costate. Leaves marginal, of two 
forms (on the same or different plants) ; the broader falcate pinnatifid ; seg- 
ments costate, linear-falcate, in. broad; narrower leaves dichotomously 
decompound; segments capillary incurved. Bladders size of a pea, stalked, 
younger mucronate. Receptacles panicled, cylindric, torulose, T g—i bi. long. 
— J. Ag. Sp. Alg. i. 286. S. pmnigerum and S. capilli folium, A. Rich. 1. c. 
t. 5 and 6. S.flexuosum, Kuetzing? 
Common on all the coasts. — Kuetzing has published a S.flexuosum, Hook, f., of which 
I know nothing. Harvey suspects it to be a state of this. 
3. S. Raoulii, Hook. f. and Harv. FI. AT. Z. ii. 212. Stem 2-4 ft. 
long, slender, smooth, compressed, zigzag, excessively branched. Leaves 
filiform, flat, dichotomously mnltifid, ribless. Bladder spherical or ellipsoid, 
obtuse, broad, solitary at the base of the leaves. Receptacles racemose, 
smooth, cylindric. — J. Ag. Sp. Alg. i. 288 ; Harv. Phyc. Austr. t. 110. 
Banks’s Peninsula, Raoul. (Tasmania.) 
