MEANINGS OF NAMES AND TEEMS 123 



orbicular, perfectly circular. 



ovate, egg-shaped ; obovate, inversely egg-shaped. 



panicle, a cluster of flowers. 



paniculate, having panicles. 



peltate, fixed to the stalk by the centre, or by some point dis- 

 tinctly within the margin. 



persistent, lasting, not deciduous. 



petiole, the stalk of a leaf. 



pinna (plural pinnae), the leaflet or primary division of a pin- 

 nated leaf. 



pinnate, when simple leaflets (or pinnae) are arranged on each 

 side of a common leaf-stalk ; 1ripinnate, when the pinnae 

 are again divided ; tripinnate, a third division. 



pinnatifid, divided not quite to the stalk. 



pinnule, a small pinna the secondary division of the leaf. 



plicate, folded lengthwise, like a lady's fan. 



plumule, the bud of a seed. 



rachis (plural rachides), the midrib or vein of a leaf or frond. 



radicle, the first root of a plant. 



receptacle, the part in which the organs of reproduction are 

 placed. 



reflexed, curved very much backwards. 



renifortn, kidney-shaped. 



reticulated, like net-work. 



rhizome, the creeping root-stalk. 



rupestral, growing in rocky places. 



serrated, with teeth like a saw. 



sessile, set en without any perceptible stalk. 



soriferous, bearing sori. 



sorus (plural sori), a cluster of spore-cases. 



spicate, in the form of a spike. 



spinulose, having spines or thorns. 



spores, the seeds of ferns. 



stipes, the proper stalk of the fern. 



sub, in composition means nearly, as sub-ovate, nearly egg- 

 shaped; sub-pinnate, not altogether pinnate. 



