OF SOUTH AUSTRALIA. 
441 
Flastid. — A protoplasmic body in 1 active cells, differentiated as centres of metabolic 
activity. 
Plexus. — A network. 
Polychotomous. — Dividing regularly into numerous branches at the one point. 
Primordia. — An organ in its earliest condition. 
Proliferous. — Bearing progeny as offshoots, applied to branches or fronds. 
Procarp. — The fertilized carpogonium together with the trichogyne. 
Protoplasm. — The viscous living substance in all plants and animals which forms the 
basis of life. 
Protuberant. — Prominent ; bulging out. 
Pulvinate. — Cushion or pad-shaped. 
Pyrenoid. — Minute, rounded, granular, colourless bodies, embedded in the chromatophores. 
Pyriform. — Pear-shaped. 
Quadrate. — Four-sided ; four-cornered. 
Quadrifarious. — In four ranks or rows. 
1 lachis. — The axis of a compound leaf or frond. 
Eamification. — The process of branching or separating into branches. 
Eamulus. — A branchlet. 
item/orm.-^Kidney-shaped. 
Eeticulated. — Net -like. 
Ehizoid. — A hair, often branched, serving as a root-like appendage. 
Ehomboid. — Quadrangular, with the lateral angles obtuse. 
Eimose. — With chinks or cracks, as in old bark. 
Eostrate. — -With a beak, narrowed into a slender tip or point. 
Eugulose. — Somewhat wrinkled. 
Sacule. — A little bag-shaped object. 
Sagittate. — Shaped like the barbed head of an arrow. 
Saxicolous. — Growing on rocks. 
Scutate. — Buckler-shaped, round or nearly round. 
Secund. — Parts of organs arranged on one side only. 
Seriate. — Arranged in a series of rows. 
Sessile. — Resting directly on the branch or stem without a stalk. 
Seta. — A bristle; a stalk bearing a sporophore. 
Setaceous. — Beset with bristles; bristle-like. 
Sinus. — A depression between adjoining lobes. 
Sorus. — A cluster of fruiting organs on the thallus. 
Sperm . — A male reproductive cell. 
Spermatangium . — The organ containing the spermatia. 
Spermatium. — A male, non-motile, gamete-cell, characteristic of the Rhodophyceae. 
Spinose. — Spiny; having spines. 
Spongiose. — Soft, with the texture of a sponge. 
Sporangium. — The organ in which asexual spores are produced. 
Sporophyte • — The plant in the life cycle which produces the asexual spores. 
Squarrose. — Rough or scurfy with spreading and outstanding processes. 
Stichidium. — A special sac-like branch containing tetraspores. 
Stipe . — The stalk or petiole of a frond. 
Striae. — Minute grooves or channels. 
Stroma. — A cushion-like tissue, often bearing fruiting organs. 
Stupose. — Tow-like, with tufts of long hairs. 
Subtend. — To extend under, or be opposite to. 
Subulate. — Awl-shaped. 
Supporting Cell. — The cell below the carpogonial branch. 
Surculus. — The basal runner attaching the plant to the substratum and producing upright 
shoots. 
Sympodial. When lateral branches below the apex become the main growing point, the 
old apex being laterally displaced. 
Terete. — Circular in transverse section, cylindric and usually tapering. 
