GLOSSARY. 



251 



Proliferous : when a new leaf or 

 frondlet springs out of an old one. 



Propagulum : a reproductive por- 

 tion of a frond, which is not a re- 

 gular spore. 



Pulvinate : shaped like a cushion or 

 pillow. 



Pyriform : like a pear. 



Quadrifarious : spreading on four 

 sides, or (more loosely) spreading 

 on all sides of the stem or branch. 



Quaternate : in fours. 



Racemose : having several stalked 

 conceptacles along a branchlet. 



Radicle : a little root, or the fibrous 

 part of a root. 



Ramellus : a diminutive of the fol- 

 lowing. 



Ramulus: a minute branch, usually 

 applied to the ultimate divisions 

 of a branching frond. The ra- 

 mellus is generally an appendage 

 to the ramulus, and of different 

 structure. 



Receptacle : a portion of the frond 

 of definite shape, containing the 

 fructification. 



Recurved : bent backwards. 



Reniform : kidney-shaped ; broader 

 than long, very obtuse, with two 

 shallow rounded lobes at the 

 base. 



Reticulate (surface) : marked with 

 inosculating lines, like the meshes 

 of a net-work ; or formed of large, 

 flat, polygonal cells. 



Retiform : like a net-work. 



Revolute : rolled back. 



Secund : arranged along one side 



only. 



Septum : a partition. 

 Serrated : toothed like the edge of 



a saw : the teeth are called serra- 



tures. 



Sessile : having no stalk. 

 Setaceous : equal in diameter to a 



a hog's bristle. 



Setiform : shaped like a bristle. 

 Siliculess little pod-like fruits. 

 Sinuated: when the margin has 



numerous shallow, obtuse inden- 

 tations. 



Sorus, pi. son : a cluster of spores. 



Sporaceous : convertible into spores. 



Sporangium : a spore-case, with its 

 contents. 



Spore : the representative of seed in 

 ciyptogamic plants. It is in all 

 cases a simple cell. 



Sporidium : a reproductive, spore- 

 like body, but not a true spore. 



Sporophylla : small leafy lobes, con- 

 taining tetraspores. 



Stichidia : pod-like receptacles con- 

 taining tetraspores. 



Stipes : the stem or stalk of a leafy 

 frond. 



Stipitate: having a stem or stalk. 



Stratum : a layer. 



Stria : a narrow line or mark. 



Stupose : covered with woolly hairs. 



Subulate : shaped like an awl. 



Tentacular: resembling the tenta- 

 cula or feelers of a snail, long 

 and slender. 



Terete : round, in opposition to flat. 



Ternate: in threes. 



Temately-parted (tetraspores) : when 

 only three of the sporules are seen 

 at one view. 



Tetraspore : a spore or gemmule 

 dividing at maturity into four 

 parts. 



Transverse : across. 



Trichotomous : dividing continually 

 in threes. 



Truncate : terminating abruptly, as 

 if broken off. 



Tubercle : a term synonymous with 

 coccidium. 



Type : generally means, as here 

 used, the perfect representation 

 or idea of anything : thus, a typi- 

 cal specimen embodies the cha- 

 racteristics of the species in an 

 eminent degree, &c. 



Ultra : more than. 



Urceolate: shaped like an ancient 

 pitcher, egg-shaped, with a nar- 

 row protruding mouth. 



