NOMENCLATURE OF THK AFI'ENDAGIiS. 105 



f. Calycine protruded from the calyx, as in the thistle. 



g. Pericarpial protruded from the pericarp or seed-vessel, as in 

 the thorn-apple. 



h. Stipular situated on the stipule, as in the mimosa nilotica. 

 i. Simple when there is only one thorn, as in most thorny plants, 

 j. Double, treble, &c. according to the number given off at the 

 same place. 



19. The terms muricate, straight, recurve, and others 

 expressive of form or nature, have been already ex- 

 plained, in speaking of the different organs or appendages 

 to plants. 



I'KICKLE OR ACULUUS. 



20. The same terms employed under the technicali- 

 ties of the thorn or spine, are also used to express the 

 same characteristic marks of the prickle. 



The rose, sweet briar, raspberry, berberry, angelica-tree, goose- 

 berry, Indian night-shade, and tomentose night-shade, will afford 

 very excellent illustrations of the prickle. 



TENDRIL OR CIRRUS. 



21. Tendrils are distinguished from their origin, the 

 division of their apices, and from their convolutions. 



22. Origin: With respect to origin, tendrils are 

 either foliar, petiolar, peduncular, axillary, sub-axillary 

 or lateral, 



a. Foliar when they are a continuation of the midrib of a simple 

 leaf, as in the superb gloriosa. 



b. Petiolar when terminating the common petiole of the leaf, 

 as in the common garden-pea. This is sometimes distinguished by 



