_Tube_ (of corolla, &c.), 89. _Tuber_, a thickened portion of a subterranean stem or branch, provided with eyes (buds) on the sides, 44. _Tubercle_, a small excrescence. _Tubercled_, or _Tuberculate_, bearing excrescences or pimples. _Tubæform_, trumpet-shaped. _Tuberous_, resembling a tuber. _Tuberiferous_, bearing tubers. _Tubular_, hollow and of an elongated form; hollowed like a pipe, 91. _Tubuliflorous_, bearing only tubular flowers. _Tunicate_, coated; invested with layers, as an onion, 46. _Turbinate_, top-shaped. _Turio_ (plural _turiones_), strong young shoots or suckers springing out of the ground; as Asparagus-shoots. _Turnip-shaped_, broader than high, abruptly narrowed below, 35. _Twining_, ascending by coiling round a support, 39. _Type_, the ideal pattern, 10. _Typical_, well exemplifying the characteristics of a species, genus, &c. _Uliginose_, growing in swamps. _Umbel_, the umbrella-like form of inflorescence, 74. _Umbellate_, in umbels. _Umbelliferous_, bearing umbels. _Umbellet_ (_umbellula_), a secondary or partial umbel, 76. _Umbilicate_, depressed in the centre, like the ends of an apple; with a navel. _Umbonate_, bossed; furnished with a low, rounded projection like a boss (_umbo_). _Umbraculiform_, umbrella-shaped. _Unarmed_, destitute of spines, prickles, and the like. _Uncial_, an inch (_uncia_) in length. _Uncinate_, or _Uncate_, hook-shaped; hooked over at the end. _Under-shrub_, partially shrubby, or a very low shrub. _Undulate_ or _Undate_, wavy, or wavy-margined, 55. _Unequally pinnate_, pinnate with an odd number of leaflets, 65. _Unguiculate_, furnished with a claw (_unguis_), 91. _Uni-_, in compound words, one; as _Unicellular_, one-celled. _Uniflorous_, one-flowered. _Unifoliate_, one-leaved. _Unifoliolate_, of one leaflet, 59. _Unijugate_, of one pair. _Unilabiate_, one-lipped. _Unilateral_, one-sided. _Unilocular_, one-celled. _Uniovulate_, having only one ovule. _Uniserial_, in one horizontal row. _Unisexual_, having stamens or pistils only, 85. _Univalved_, a pod of only one piece after dehiscence. _Unsymmetrical Flowers_, 86. _Urceolate_, urn-shaped. _Utricle_, a small thin-walled, one-seeded fruit, as of Goosefoot, 121. _Utricular_, like a small bladder. _Vaginate_, sheathed, surrounded by a sheath (_vagina_). _Valve_, one of the pieces (or doors) into which a dehiscent pod, or any similar body, splits, 122, 123. _Valvate_, _Valvular_, opening by valves. _Valvate_, in æstivation, 97. _Variety_, 176. _Vascular_, containing vessels, or consisting of vessels or ducts, 134. _Vascular Cryptogams_, 156. _Vaulted_, arched; same as _fornicate_. _Vegetable Life_, &c., 128. _Vegetable anatomy_, 129. _Veins_, the small ribs or branches of the framework of leaves, &c., 49, 50. _Veined_, _Veiny_, furnished with evident veins. _Veinless_, destitute of veins. _Veinlets_, the smaller ramifications of veins, 50. _Velate_, furnished with a veil.