Appendix VI: Glossary. 
Truncate. Ending abruptly as if cut 
off transversely. 
Trunk. A main stem. 
Tube. Any elongated hollow body 
or part of an organ. 
Tuber. A thickened rhizome, with 
scattered buds or eyes. 
Tubercle. A small projection or 
pimple; a small tuber or a tuber- 
ous root. 
Tuberculate. Covered with small 
rounded prominences or knobs. 
Tuberiferous. Bearing tubers. 
Tuberous. Resembling a tuber. 
Tubular. Tube-shaped. 
Tubuliflorous. When the flowers of 
a head have only tubular corollas. 
Tunicate. Having concentric coats, 
as an onion. 
Turbinate. Top-shaped. 
Twining. Ascending by winding about 
a support. 
Type. The ideal pattern or form. 
Typical. That which corresponds to 
or represents the type. <A typical 
species is one upon which the 
generic character was founded, or 
one which conforms most closely 
to the general characters of the 
genus, deviations from which from 
the basis for subgenera, ete. So 
the typical form of a species is that 
upon which the specific character 
is based, as distinguished from all 
varieties, sports, ete. 
Umbel. An umbrella-shaped inflore- 
scence, the pedicels radiating from 
the summit of the common peduncle. 
Umbellate. Bearing or growing in 
umbels. 
Umbellet. A small secondary umbel 
upon the ray of the primary. 
Umbelliferous. Bearing umbels. 
Umbellulate. Bearing umbellets. 
Umbilicate. Pitted in the centre, 
navel-like. 
Umbonate. Bossed; bearing a stout 
projection in the centre, like the 
boss of a shield. 
Umbraculiform. Having the form of 
an umbrella. 
Unarmed. Without prickles, spines, 
or the like. 
Uncinate. Hooked at the extremity, 
1225 
Undulate. Wavy, alternately raised 
above and depressed below the 
general plane. 
Undershrub. A very low shrub. 
Unequal. Not equal; unsymmetrical; 
unequally pinnate, with an odd 
terminal leaflet. 
Unguiculate. Of a petal, narrowed 
below into a claw or petiole-like base. 
Unilateral. One-sided. 
Unilocular. One-celled. 
Uniovulate. Having a single ovule. 
Uniserial. In one horizontal row or 
series. 
Unisexual. Of one sex; of flowers 
having stamens only or pistils only. 
Urceolate. Cylindrical or ovoid, but 
contracted at or below the open 
orifice, like an urn or pitcher. 
Utricle. A small bladdery usually 
one-seeded pericarp, indehiscent or 
bursting irregularly or circumscissile ; 
any small bladder-like organ, or 
sometimes applied to forms of tissue- 
cells. 
Utricular. Consisting of or belonging 
to utricles. 
Vagina. A sheath. 
Vaginate. Sheathed. 
Vaginule. A diminutive sheath. 
Valleculae. The grooves between the 
ribs of the fruit in Umbelliferae. 
Valvate. Opening by valves, as a 
capsule; meeting by the edges, 
without overlapping, as sepals, etc., 
in aestivation. 
Valve. The several parts of a dehiscent 
pericarp; the door-like lid by which 
anthers sometimes open. 
Variegated. Irregularly colored. 
Variety. The principal subdivision 
of a species, differing from the type 
in certain constant characters of 
subordinate value. 
Vascular. Relating to or composed 
of elongated tubular cells (vessels, 
ducts), as distinguished from cellular. 
Veined. Furnished with veins. 
Veinless. Destitute of evident veins. 
Veins. Bundles of woody tissue tra- 
versing a leaf or other flat surface, 
and forming its framework, espe- 
cially those which branch (as distinct 
from nerves). 
