In many red algae: a fructification, often protuberant and wart-like, containing tetraspore-producing filaments.

The outer covering of the cystocarp, found in algæ of the family Rhodomelaceæ.

A group (usually) of four asexual spores, resulting from the division of a mother cell, in the Florideæ, a group of Algæ.

(a) Botany (see quot. 1860: ? obsolete); (b) Botany the structure which bears the trichogyne in florideous algæ; (c) Zoology one of several…

Any of various red phycobiliprotein pigments that are the dominant photosynthetic pigments in most red algae and also occur in blue-green algae.

Botany. A spherical or hemispherical conceptacle found in the rhodospermous algæ.

In florideous algæ, a cystocarp containing undivided spores.

The sexual fruit of the Florideæ, a group of Algæ; also called cryptocarp n. at crypto-, comb._form affix 1.

A red pigment found in the unicellular alga Palmella cruenta.

= tetraspore, n.

a chromoplast containing a red pigment, phycoerythrin, found in red algae.

= nemathecium, n.

Botany. One or other of a number of elongated cells which surround the large monosiphonous cell in the frond of certain florideous red algæ.

A sporangium producing or containing tetraspores. Rarely anglicized as ˈtetraspoˌrange n. (Cent. Dict. 1891).