178 THE LEAF 



Such hairs as are capable of producing a sericeous surface are them- 

 selves denominated sericeous or silky, even though they be in insuffi- 

 cient numbers to impart this character to the general surface. 



A surface tending toward the sericeous, but not suflBciently pro- 

 nounced, is called Canescent. 



When there is a dense covering of more or less elongated and matted 

 hairs, the surface is called Tomentose^ 



When such a covering is thin, its hairs less elongated, it is called 

 Tomentellate. 



Whene there is a covering of thinly distributed, elongated, moder- 

 ately soft hairs, which are not closely appressed, the surface is Pilose . 



When hairs are similarly distributed, but are elongated and coarse, 

 the surface is Hirsute. 



When similar coarse hairs are rather stiff, lie in one direction, some- 

 what appressed, and particularly when each develops from an elevated 

 base, the surface is Strigose._ 



A surface which possesses an indumentum of scales is called Lepidote. 



A surface is called Papillose when it is minutely warty, or tuberculate, 

 due usually to glands underneath the surface. 



When the indumentum consists of hard, elevated points, giving a 

 roughness to the surface, the latter is Scabrous. 



When such elevations are more pronounced, unyielding, and sharp- 

 pointed, the surface i s His pjd. . 



A surface which is roughened by the presence of numerous, closely- 

 set wrinkles is Rugose. 



When a surface is made up of small, blister-like elevations consisting 

 of the arching interspaces between the veins, it is Bulla te_(Fig. 484). 

 The opposite surface, containing the cavities of the bullae, is called 

 Cancellate_ (Fig. 485). 



When the hairy covering is chiefly confined to the margin, presenting 

 itself in the form of a fringe of hairs, the term_Ciliat£js applied (Fig. 

 475). 



A surface which is marked by spots differing in color from the remain- 

 der of the surface is called ^laculate^ If spots of any kind be small 

 and dot-hke, the term_Puncta£e is applied. 



Finally, it is to be noted whether the veins or ribs, and if so which 

 of them, are prominent upon both sides or either side, or whether, upon 

 the contrary, they are depressed (called Impressed) below the general 

 surface. At times a rib or vein will not be impressed, but will yet be 

 Channelled, and may appear impressed upon casual observation. 



