GLOSSAEY. 



829 



from the axil of this a second axis arises, 



and so on in succession ; a false axis is thus 



formed. 

 Uniparous, scorploidal cyme. See Scorpioid. 

 Unisexual, of a single sex, applied to plants 



having separate male and female flowers. 

 Urceolate, urn-shaped, applied to a gamo- 



petalous globular corolla, with a narrow 



opening. 

 UsTULATE, blackened. 

 Utricle, a name for a thin-walled cell, or for 



a bladder-like covering. 

 Utriculus, applied to a kind of fruit like the 



achene, but with an inflated covering ; also to 



the persistent confluent perigone of Carexi; 



in Algas applied to a loose cellular envelope 



containing spores. 



Vagina, sheath, lower sheathing portion of 



some leaves. i\ 



Vallecula, an intervart^tween the ribs on 



the fruit of Umbelliferae. 

 Valvate, opening by valves, like the parts of 



certain seed-vessels, which separate at the 



edges of the carpels. 

 Valvate Estivation, when leaves in the 



flower-bud are applied to each other by their 



margins only. 

 Valvate Vernation, when leaves in the 



leaf-bud are applied to each other by their 



margins only. 

 Valves, the portions which separate in some 



dehiscent capsules. A name also given to the 



parts of the flower of grasses. ' 

 Vascular tissue, composed of spiral vessels 



and their modifications. 

 Vasiform tissue, same as Doited vessels. 

 Veins, bundles of vessels in leaves. 

 Velum, veil, the cellular covering of the gills of 



an Agaric in its early state. 

 Velutinous, having a vislvety appearance. 

 Venation, the arrangement of the veins. 

 Ventral, applied to the part of the carpel 



which is next the axis. 

 Ventricose, swelling unequally on one side. 

 Vermicular, shaped like a worm, or having 



worm-like movements. 

 Vernation, the arrangement of the leaves in 



the bud. 

 Verrucose, covered with wart-like excre- 

 scences. 

 Versatile, applied to an anther which is at- 



tached by one point of its back to the fila- 

 ment, and hence is very easily turned about. 

 Verticil, a whorl, parts arranged opposite to 



each other at the same level, or, in other 



words, in a circle round an axis. The parts 



are said to be Verticillate. 

 Verticillaster, a false whorl, formed of two 



nearly sessile cymes placed in the axils of 



opposite leaves, as in Dead-nettle. 

 Vesicle, another name for a cell or utricle. 

 Vessels, tubes with closed extremities. 

 Vexillary, applied to aestivation when the vex- 



illum is folded over the other parts of the 



flower. 

 Vexillum, standard, the upper or posterior 



petal of a papilionaceous flower. 

 ViGiNTi, twenty, same as Greek Icosi. 

 Villous, covered with long soft hairs, and 



having a woolly appearance. 

 ViRGATE, ItJng and straight' like a wand. 

 Viscous, clammy," like bird-lime. 

 ViTELLUS, the embryo-sac when persistent in 



the seed. 

 ViTT^, cells or clavate tubes containing oil in 



the pericarp of Umbelliferge. 

 Viviparous, plants producing leaf-buds in 



place of fruit. 

 VoLUBiLE, twining, a stem or tendril twining 



round other plants. 

 VoLVA, wrapper, the organ which encloses the 



parts of fructification in some Fungi in their 



young state. 



Whorled, same as Verticillate. 

 Wings, the two lateral petals of a papilionaceous 

 flower, or the broad flat edge of any organ. 



Xanthophvll, yellow colouring matter in 



plants. 

 Xanthos, yellow, in composition Xantko. 

 Xerophilou's, plants requiring a hot and dry 



climate. 

 Xylem, woody tissue. 

 Xylocarpous, fruit which becomes hard and 



woody. 



Zoophilous, applied to plants which are fer- 

 tilised by the agency of insects. 



Zoospore, a moving spore provided with cilia ; 

 called also Zoosperm and Sporozoid. 



Zygospore, compound spore formed by con- 

 jugating cells in Fungi, 



ZooTHECA, a cell containing a spermatozoid. 



