GLOSSARY 379 



Trigonal, with three angular edges, p. 252. 



Trimethylamine, a peculiarly smelling organic substance found in 



herrings, &c., and in certain flowers, p. 321. 

 Tubular, drawn out to a tube. 

 Turbinate, top-shaped, p. 229. 

 Two-lipped, see Bilabiate. 

 Typical, affording a fair example. 

 Umbel, an indefinite inflorescence with pedicels of equal length radiating 



from one centre, p. 23. 

 Umbellate, of umbel-like shape, p. 39. 



Umbo, the small projection on the apophysis of many pine-cones, p. 182. 

 Uniaxial, with one axis. 

 Unisexual, a name commonly but, strictly speaking, erroneously used 



for diclinous flowers. 

 Urceolate, urn-shaped, p. 205. 

 Vacuole, a sap-drop in the cell. 

 Valvate aestivation, when the margins of the parts in the flower-bud 



are merely in contact, p. 147. 

 Valvular, opening by valves. 



Vascular bundle, a group of vessels, sieve- tubes, &c. 

 Velvety, see Villose, p. 215. 



Venation, the totality of vascular strands in the leaf, &c. 

 Venter, the basal part of an archegonium. 

 Ventral, nearest the axis. 



Ventral canal- cell, a peculiar cell at the base of the neck of an arche- 

 gonium. 



Verrucosities, slight wart-like roughnesses, p. 235. 

 Versatile, of an anther with the filament so inserted that the anther 



dangles in the wind. 

 Verticillaster, a false whorl due to two opposite axillary groups of 



flowers meeting round the node, p. 34. 

 Vexillum, same as Standard. 

 Villous, with velvet-like hairiness, p. 221. 

 Viscin, the sticky matter of the fruit of the mistletoe, p. 266. 

 Whorl, where three or more organs are inserted round the axis at the 



same node, p. 46. 

 Wing, a flattened appendage to a fruit, seed, &c. Also the lateral petal 



of a papilionaceous flower ; see Alae, &c. 

 Zygomorphic, with the planes of symmetry such that the flower can 



only be once cut into corresponding- halves. 



