428 



GLOSSARY. 



Pruinose ; covered with n glaucous meali 

 ness, like a plum. 



Pseudo pinnate ; falsely or imperfectly 

 pinnate, the leaflets (or rather segments) 

 not articulated at base : See Pinnatixect. 



Puberulent ; covered with a minute, short 

 and fine pubescence. 



Pubescence. A general term for the hairy 

 covering of plants. 



Pubescent; clothed with hairs, especially 

 with short weak hairs. 



Pulp. A soft, fleshy or juicy mass. 



Pulverulent ; dusty ; composed of, or cov- 

 ered with, a fine powder. 



Punctate; appearing as if pricked full of 

 small holes, or covered with indented 

 points. 



Puncticulat?; having very minute punc- 

 tures, or indented points. 



Pungent; sharp-pointed, prickly at apex ; 

 also acrid. 



Pyramidal; tapering upwards; usually 

 applied to 4-sided solids which diminish 

 to the apex. 



Pyriform; shaped like a pear; largest at 

 the upper end. 



Quadrangular ; four-angled. 



Quadrifarious ; in 4 rows, or directions ; 

 facing or pointing 4 ways. 



tddrifid; 4-cleft. 

 aternate; 4 together ; arranged in fours. 

 inate ; 5 together ; arranged in fives. 

 ce of plants. A fixed and peculiar form 

 or modification, produced by the cross- 

 ing or blending of distinct varieties ; or 

 sometimes, perhaps, accidental forms 

 rendered permanent by culture, or other 

 influences. 



Raceme. A mode of flowering, in which 

 the common peduncle is elongated, 

 with the flowers on short lateral simple 

 pedicels. 



Racemose; having the flowers in racemes. 



Rachis or Rhachis. The common pedun- 

 cles, or elongated receptacle, on which 

 florets are collected in a spike ; also the 

 midrib of a pinnatisect frond. 



Rddiate; having rays (i. e. spreading ligu- 

 late florets) at the circumference; as the 

 heads of many Composite. 



Ra<Hate-vein,ed; where the veins of a leaf 

 diverge from a common centre, or point, 

 at the summit of the petiole. 



Radiatiform; a term applied to heads of 

 compound flowers in which all the florets 

 are ligulate, and directed towards the 

 circumference. 



Radical; belonging to, or growing imme- 

 diately from, the root. 



Radicating; sending out roots, or striking 

 root at the nodes. 



Radicle. A little root ; the slender fibrous 

 branch of a root. 



Rameal; pertaining or belonging to the 

 branches. 



Ramification. The branching or division 

 of an organ into several parts. 



Ramoxe; branching. 



Rank. A row, or arrangement in a line. 



Raphe. The line, or little ridge, on on 



side of anatropous (i. e., inverted) ovules 



and seeds, formed by the adhesion of a 



portion of the fiiniciilus. 

 Ratoon (Span. Rttono). A sprout from the 



root of a plant which has been cut off 



(chiefly used in reference to the Sugar- 



cane). 

 Rays. The spreading ligulate florets 



round the disk of a compound flower ; 



also, the footstalks, and enlarged mar- 



ginal flowers, of an umbel. 

 Receptacle. The apex of the peduncle 



(much dilated in the COMPOSITE ), on 



which the parts of a flower (or entire 



florets) are inserted; the seat of the 



fruit, or of seeds and their equivalents. 

 Recurved; curved backwards. 

 Reflexed; bent or doubled backwards. 

 Regular; having the parts uniform and 



equal among themselves, as the lobes or 



petals of a corolla. 

 Remote ; seated or growing at an unusual 



distance. 



Renijbrm; kidney-shaped. 

 Repdnd ; having the margin slightly in- 



dented with shallow sinuses. 

 Replicate; folded back on itself. 

 Replum. A name given to parietal pla- 



eentie when separated from the valves; 



also, the persistent border of a fallen le- 



gume. 



Resiipinate; turned upside down. 

 Reticulate ; netted ; having veins or 



nerves crossing each other, or branching 



and reuniting, like network. 

 Retrorse, or retrorsely ; pointing back- 



wards or downwards. 



Retuse; having a shallow sinus at the end. 

 Resolute; rolled backwards, or outwards. 

 Rhizoma. A root-stock, or root-like sub- 



terraneous stein. 

 Rhombic, or i&fimboid ; rhomb-shaped; 



having four sides, with unequal an- 



gles. 

 Ribbed ; having ribs, or longitudinal 



parallel ridges. 

 Ribs. Parallel ridges, or nerves, extending 



from the base to, or towards, the apex. 

 Rigid ; stiff, inflexible, or not pliable, 

 Ri-ngent; gaping, with an open throat. 

 Root-stock. See Rhizoma. 

 Rostrate ; beaked ; having a process re- 



sembling the beak of a bird. 



; in a rosette; arranged in circular 



series, like tb,e petals of a double rose. 

 Rotate corolla. Wheel-shaped ; monopet- 



alous for gamopetalous) and spreading 



almost flat, with a very short tube. 

 Rough; covered with dots, points, or short 



hairs, which are harsh to the touch. 

 Round ; circular, or globular ; not angular. 



See globose, orbicular, and terete. 

 Rudiment. An imperfectly developed 



organ. 



