Boot 



rotaceus 



Hairs, slender outgi'owths from the 

 cells of the piliferoiis layer of the 

 newly formed portions of roots ; ^ 

 Knot, a disease of cucumbers and 

 tomatoes, due to eelworms ; '^ Leaf, 

 a leaf springing from the ba'-e of the 

 stem ; --' Parasit'ism, when plants 

 are partially parasitic and their 

 roots penetrate others, as in Rhin- 

 an^hus ; '^ Poc'ket, the false 

 "Cap" in Lemma, roots; '-' Pole, 

 the sent of new growth when 

 the root is detached ; ~' Pres'sure, 

 (1) the forcing of fluids into the 

 xylem by osmotic force in the 

 roots ; (2) see Exudation Pres- 

 auKE ; ~' Rot, diseases due to 

 fungi ; White -^ '-' , caused by Rosel- 

 linia vecatrix, and Black ~ ~, by 

 Thielavia hasicola ; '- Sheath = 



COLEORHIZA. 



Boot'stalk, the iirimary un1)ranched 



root in a young plant.' 

 Root'stock = Rhizome ; ~ Tulberctes, 



the result of attack by Fungi or 

 bacteria, a case of symbiosiis, and 

 source of nitrogenous nourishment 

 to the host. 



Boot, adventit'ious, any not developed 

 as a branch of the primary root, but 

 from other members; aerial ~, 

 used of those which are developed 

 above ground, as of epiphytes; 

 pri'mary ~ , that developed at the 

 opposite pole of the embryo to the 

 shoot, the main descending axis. 



roofing, radicant. 



Boot'let, (1) a very slender root, or (2) 

 the branch of a root ; (3) appendages 

 of Stiqmaria \x\ (\\\\nc\\x\i\dA order on 

 its surface , 



rope-shaped, funicular. 



ror'idus (Lat , bedewed), dewy, 

 covered with particles which re- 

 semble dew-drops. 



rosa'cean, used by batologists to in- 

 dicate an affinity or likeness to 

 Riibus rosaceus. 



rosa'ceons, -ecus {rosa, -f acf.ous), (1) 

 arranged like the fivn petals of a 

 normal rose ; (2) belonging to the 

 order . of which Rosa is the type ; 

 (3) rcse-colour, pink. 



rosela'tus = (1) rosulatus, or (2) 



EOSACK.OUS. 



Bosel'la (dim. of 7'03a) = Bosette', a 

 cluster of leaves or other organs in 

 a circular form, as Plantago major, 

 Linn. ; ~' Plants, those with short 

 internodes and closely-set leaves, 

 usually epigeous and evergreen 

 (Warming) ; ~ Shoot, a cluster of 

 leaves on a branch from the same 

 point; — double -', = Dyaster; 

 Peach '-', a disease attacking 

 peach-trees, shown by short rosette- 

 like growths in spring; the Umbi- 

 li'cal '^ of Diatoms is a central 

 star-shaped projection or depression 

 of a few larger cells, as in Cosci- 

 nndiscus. 



ros'eolus (Mod. Lat.), pink or pinkish. 



Bose'tum ( Lat. ), a rose-garden. 



ros'eus (Lat.), rosy, ]>ale-red. pink. 



Bo'sile, a " society " of Rosa (Clements). 



Bos'in, crude Resin ; ros'inous (Grew) 



= RESINOUS. 

 Bos'tel = ROSTELLUM. 



rostell'ate, rostdla'txis {rosfellum, a 

 little beak), the diminutive of 

 rostrate, somewhat beaked ; Bostel'- 

 lum, (1) a small beak ; (2) applied 

 by Linnaeus to the caudicle or 

 radicle; (3) a narrow extension of 

 the upper edge of the stigma of 

 ci^rtain Orchids, the abortive 

 anterior lobe ; (4) the projecting 

 free ends of perithecia in certain 

 Fungi (Travers); ros'trate, rostra' tns, 

 with a beak, naiTOwed into a 

 slender tip or point; ros'triform 

 [forma, shape), beak- shaped ; 

 Ros'trutn (Lat., a beak), (I) any 

 beak-like extension ; (2) the inner 

 segment of the coronal lobes in 

 Asclepiads. 



Bos'ala (dim. of rosn), (1) a small 

 rose ; (2) = RosETrE ; a collec- 

 tion of clustered leaves, as the 

 Houseleek ; ros'ular, rosular'is, 

 ros'ulate, rosula'lus, collected into 

 a rosette. 



Rot, applied to various diseases of 

 fungous or bacterial origin.' 



rota'ceus + (rota, a wheel, -|- accus) 

 = rotate', rota'tus, wheel-shaped, 



330 



