308 BRITISH SEA-WEEDS. 



Subulate, awl-shaped. 



Succulent, juicy. 



Tenacious, tough. 



Tetraspore, a four-parted spore, a name usually applied to 

 one of the kinds of fructification of the Eed sea-weeds. 



Tomento.se, cloth-like, nappy. 



Tortuous, many times bent, twisted. 



Transverse, crosswise. 



Trichotomous, repeatedly divided in threes. 



Tripartite, divided into three. 



Tripinnate, when the secondary branchlets or pinnules of a 

 frond are branched. 



Truncate, not pointed, ending abruptly. 



Tiober, a fleshy, longish or roundish root. 



Tubercle, a wart or knot containing spores or tetraspores. 



Tuberculate, covered with knots or warts. 



Umbelliferous, bearing branchlets, springing from a common 

 centre and forming round flat heads. 



Vascular, veined. 



Verrucose, warty. 



Verticillate, whorled, placed in circles round a stem. 



Vibratile, inclined to vibrate. 



Villous, covered with numerous soft hairs. 



Virgate, rod-like. 



Whorls, branchlets arranged in a regular circumference 

 round a stem. 



Zigzag, angularly bent from side to side. 



Zonate, divided or marked by transverse or circular lines or 

 bands. 



Zoospores, (from zoos, living, and sporos, a seed) the fructi- 

 fication of certain sea-weeds of the Green series, in 

 which a ciliary motion gives the appearance of life. 



