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GLOSSARY OF BOTANICAL TERMS. 



Thorn. — The same as spine. 



Thyrse, or Thyrsus. — A compact panicle, 

 like the inflorescence of the Grape. 



Tissue. — A collection of cells of a similar 

 character. 



Tomentose, or Tomentous. — Applied to 

 surfaces which are covered with matted 

 hairs. 



Torose. — Cylindrical, with constrictions 

 and enlargements at intervals. 



Tortuous. — Irregularly bent or twisted. 



Torus. — Another name for receptacle, q. v. 



Trabeculate. — Having bars runningcross- 

 wise. 



Trachea. — Rows of cells which become 

 confluent by losing their intervening par- 

 titions: vessels or ducts. 



Tracheary-tissue. — A term which in- 

 cludes both tracheids and tracheae or 

 ducts. 



Tracheid — An elongated cell whose mark- 

 ings resemble those of ducts. It differs 

 from a duct in the fact that it represents 

 a single cell, while a duct represents two 

 or more cells that have become confluent, 

 end to end. 



Trabecular Duct. — A duct whose cavity 

 or lumen is crossed by ligneous threads 

 or bands. 



Trachycarpous. — Having the fruit rough- 

 ened. 



Trachyspermous. — Having the seed rough- 

 ened. 



Transpiration. — The evaporation of water 

 or other vaporizable matter from the plant. 



Triadelhous. — Applied to stamens that are 

 united by their filaments into three sets. 



Triandrous. — Having three stamens. 



Trianthous. — Three-flowered. 



Triarch. — A term descriptive of radial 

 fibro-vascular bundles having three rays. 



Tricarpellary. — Consisting of three car- 

 pels. 



Tricarpous.— Haxing three carpels or three 

 fruits. 



Trichoblast. — An internal hair, like those 

 which project into the intercellular spaces 

 of the stems of some Water-lilies. 



Trichocarpous. — Having the fruit covered 

 with hairs. 



Trichogyne. — A style-like appendage to the 

 carpogonia of certain Carpophyta. 



Trichome. — A general term for a plant-hair 

 or any of its various modifications. 



Trichotomous. — Branched into three equal 

 branches. 



Tricoccous. — Having three cocci, or meri- 

 carps. 



Tricuspidate. — Tipped with three cusps or 

 small hard teeth. 



Tridentate. — Three-toothed. 



Trifoliate. — Possessing three leaves. 



Trifoliolate. — Applied to a compound 

 leaf that has three leaflets. 



Trigonous. — Three-angled. 



Trigynous. — Having three pistils. 



Trijugate. — Having three pairs of leaf- 

 lets. 



Tri-lobate. — Three-lobed. 



Tri-loculate. — Having three loculi. 



Trimerous. — Applied to flowers construct- 

 ed on the numerical plan of three. 



Tri-morphism. — A term used to indicate the 

 fact that hermaphrodite flowers of three 

 different kinds, short-styled, mid-styled, 

 and long-styled, are produced on the same 

 species of plant. 



Tripartite. — Three-parted. 



Tri-petalous. — Three-petaled. 



Tri-phvllous. — Three-leaved. 



Tri-pinnate. — Three times pinnately-com- 

 pounded. 



Triquetrous. — Three-angled, or triangu- 

 lar-prismatic. Applied to certain stems 

 and leaves. 



Tri-sepalous. — Three-sepaled. 



Tristichous. — Arranged in three perpen- 

 dicular rows. Applied to phyllotaxy. 



Tri-stylous. — Three-styled. 



Tri-sulcate. — Three-grooved. 



Tri-ternate. — Applied to a leaf that is 

 thrice compounded on the ternate plan. 



Trochlear. — Pulley-shaped. 



Truncate. — Ending abruptly, as if cut off. 



Tryma. — A drupe-like fruit, which is com- 

 monly two-celled, has a bony nucleus and 

 thickish but fibrous epicarp. Example : 

 a hickory-nut. 



Tuber. — A thickened portion of an under- 

 ground stem. 



Tuberculate, or Tubercled. — Warty ; 

 bearing tubercles. 



Tuberiferous. — Bearing tubers. 



Tuberous. — Tuber-like, or tuber-bearing. 



Tubuliflorus. — Having the heads com- 

 posed of tubular flowers. 



Tubular. — Nearly cylindrical and hollow 

 like a tube, as a tubular corolla or 

 calyx. 



Tunicate. — Having coverings or coats. A 

 bulb like that of the Onion is tunicated. 



Turbinate. — Top-shaped. 



