turned 



Umbel 



Linn., which yields a yellow 

 dye. 

 turned, in botany, directed towards ; 



as ~ in' wards = introrse 



out'- 



wards = extrorse. 



tur'nip-shaped, also termed napiform. 



Tur'pentine (terebinthus, turpentine 

 tree), the solution of resins in tere- 

 bene ; <~ Ves'sels, tubes in the 

 wood in which the turpentine col- 

 lects during growth, common in 

 Conifers. 



Tus'sock, a tuft of grass or grass-like 

 plants. 



Twig, a small shoot or branch of a 

 tree ; ~ Cli'mbers, Schenck's term 

 for certain Brazilian lianes, the 

 young leafy lateral branches being 

 sensitive where in contact with 

 their supports ; <-> Gall, a morbid 

 growth ascribed to the action of 

 bacteria ; ~ -like, long, flexible 

 and wandlike. 



Twin, in pairs, geminate, didymous. 



Twi'ners, plants which twine or climb 

 by winding their stems round their 

 support ; twi'ning, winding spirally. 



twist'ed, contorted. 



two-cleft, bifid ; ~ -edged, ancipital, 

 laterally compressed with two sharp 

 angles parallel with the axis ; ~ 

 -forked, dichotomous ; ~ -lipped, 

 bilabiate ; ~ -parted, bipartite ; 

 . ranked, distichous ; toothed, 

 bidentate. 



tychopot'amic (rvxy, chance, 7rora/x6s, 

 a river) Plank'ton, the floating 

 organisms of pools and river over- 

 flows (Zimmer). 



tylic'olor (Mod. Lat.), the colour of a 

 woodlouse, slate or dark grey. 



Ty'lose, Tylo'sis (ru'Xos, a callosity), 

 a cell intruding into a duct. 



tym'paniform (tympanum, a drum, 

 forma, shape), drum-shaped, as 

 the membrane covering a Moss- 

 capsule ; Tym'panum, the mem- 

 brane across the mouth of the 

 capsule of a Moss, the epiphragm. 



Type, the ideal representative of a 

 group, genus, species ; ~ Spec'i- 

 men, the original specimen from 

 which a description was drawn up ; 



280 



typ'ical, typ'icus, represeniing the 

 plan or type ; ~ Cells, fundamental 

 cells ; ~ Di'agram, the resultant 

 form from several empiric dia- 

 grams. 



Typhe'tum, Warming's term for an 

 association of Ti/pha plants. 



Ty'rosin (rvpos, cheese), an amide, 

 similar to Asparagin ; Ty'rosinase, 

 an oxidising enzyme which attacks 

 the chromogen of certain Fungi 

 (Bertrand). 



Ubi'quist (ubique, everywhere), used 

 by Thurmann and adopted by 

 Warming for a plant which occurs 

 on any kind of geologic formation. 



ulig'inose, itligino'sus, ulig'inous, uli- 

 ginar'ius (Lat., marshy), growing 

 in swamps ; ulig'inal, occasionally 

 used for the foregoing. 



Ul'na (Lat., the elbow), a measure of 

 about twenty-four inches ; ul- 

 na'ris, the length of the forearm. 



uloden'droid (eldos, resemblance), like 

 the former fossil genus Ulodendron, 

 Rhode, applied to branches of 

 Lepidodendron and Sigillaria, bear- 

 ing two opposite rows of large, 

 cup-shaped scars (Scott). 



u'lothrix (o?<Xos, shaggy, Opi$, hair), 

 in hair-like crisped linear divisions 

 (Henslow). 



ulter'ior (Lat., farther) Pith, cellular 

 structure formed in the axis of the 

 root after the separation of the 

 stele (Fremont). 



ul'tra-seta'ceous (ultra, beyond, 

 seta, & bristle, + aceous), very long 

 drawn out. 



Um'bel, Umbel'la (Lat., a sunshade), 



(1) an inflorescence, properly in- 

 determinate, in which a cluster of 

 pedicels spring from the same 

 point, like the ribs of an umbrella ; 



(2) I the pileus of certain Fungi 

 (Lindley) ; com'pound ~, when 

 each ray itself bears un umbel ; 

 cy'mose ~ , an apparent umbel, 

 but with the flowers opening centri- 

 fugally ; a cyme which simulates 

 an umbel ; par'tial ~ , sim'ple ~ , 

 an umbel each of whose rays bears 



