294 



GLOSSARY 



Twining. Ascending by coiling round a 

 support. 



Umbel. A determinate, usually convex 

 flower-cluster, with all the pedicels 

 arising from the same point. 



Umbellate. Borne in umbels; resembling 

 an umbel. 



Umbellet. A secondary umbel. 



Umbellifer. A member of Ammiaceae, or 

 Carrot Family. 



Umbonate. Bearing a stout projection In 

 the center; bossed. 



Unarmed. Destitute of spines, prickles, 

 and the like. 



Ucinale. Hooked, or in form like a hook. 



Undulate. With a wavy surface; repand. 



Unguiculate. Contracted at base into a 

 claw. 



Uni- (in compounds) means one. 



Unicellular. One-celled. 



Unifoliolate. Applied to a compound 

 leaf that has but one leaflet, as the 

 leaves of the Orange and Lemon. 



Unilocular. Possessing one locule or cell. 



Uniserial. Arranged in one series. Ap- 

 plied to parts that are arranged in one 

 horizontal whorl. 



Unisexual. Having only one kind of sex- 

 organs; applied also to flowers having 

 only stamens or pistils. 



Urceolate. Urn-shaped. 



Utricle. A small, thin-walled, one-seeded 

 fruit. 



Utricular. Like a small bladder. 



Vaginate. Surrounded by a sheath. 

 Vahate. Meeting by the margins in the 



bud, not overlapping; dehiscent by 



valves. 

 Valve. One of the pieces into which a 



dehiscent pod, or any similar body, 



splits. 

 Veinlet. The smaller ramiflcations of 



veins. 

 Veins. Threads of flbro-vascular tissue 



in a leaf or other organ, especially those 



which branch (as distinguished from 



nerves) . 

 Velum. A fold of the inner side of the 



leaf-base in Isoetes. 

 Velutinous. Velvety; with dense fine 



pubescence. 

 Venation. The veining of leaves, etc. 

 Ventral, Ventrally. Being on the side 



next the axis. 

 Ventricose. SwelUng unequally, or in- 

 flated on one side. 

 Venulose. Finely veiny. 

 Vernation. The arrangement of leaves in 



the bud. 

 Verrucose. Warty; covered with pro- 

 tuberances. 

 Versatile. An anther attached at or near 



its middle to the filament. 

 Verticil. A whorl. 

 Verticillaster. A pair of opposite cymes 



that occur in the axils of the leaves of 



Mints. 

 Verticillate. Whorled. 

 Vesicle. A small bladder or air-cavity. 

 Vespertine. Belonging to the evening; 



applied to flowers that open at night- 



faU. 

 Vexillum. The standard of a papihon- 



aceous flower. 

 Villous. Bearing long and soft hairs. 

 Virgate. Wand-shaped; slender, straight 



and erect. 

 Viscid. Glutinous; sticky. 



Whorl. A group of three similar organs 

 or more, radiating from a node. Verti- 

 cil. 



Wing. Any membranous expansion. 



Woolly. Clothed with long and entangled 

 soft hairs. 



Zoospore. Literally, an animal spore; 

 a vegetable spore endowed with the 

 power of locomotion, and therefore 

 appearing like an animal. 



Zygomorphous, Zygomorphic. Flowers 

 which are divisible in only one plane into 

 similar halves are called zygomorphous. 



