374 VEILING. [BOOK in. 



Mirb. When the ribs are straight and almost parallel, but united at the 



summit ; as in Grasses. De Cand. 

 9. t Curve-ribbed (f curvinervis, f converginervis} ; when the ribs describe a 



curve, and meet at the point ; as in Plantago lanceolata. 

 1 0. f Ruptinervi* ; when a straight-ribbed leaf has its ribs interrupted at intervals. 



De Cand. 

 11.+ Penniformis ; when the ribs are disposed as in a pinnated leaf, but 



confluent at the point ; as in the Date. De Cand. 



12. f Palmiformis ; when the ribs are arranged as in palmate leaves ; as in 



the Chamserops. Id. 



13. f Penninervis; when the ribs are pinnated (De Cand.) ; as in Castanea vesca. 



14. f Pedatinervis; when the ribs are pedate. De Cand. 



15. -f Palminervis; when they are palmated. Id. 



16. f Peltinervis ; when they are peltate. Id. 



1 7. t Vaginervis ; when the veins are arranged without any order ; as in 



Ficoidese. Id. 



18. f Retinervis; when the veins are reticulated, or like lace. Id. 



19. f Nullinervis, or Enervis ; when there are no ribs or veins whatever. Id. 



20. + Falsinervis ; when the veins have no vascular tissue, but are formed of 



simple, elongated, cellular tissue ; as in Mosses, Fuci, &c. 



21. f Hinoideus; when all the veins proceed from the midrib, and are parallel 



and undivided ; as in Scitaminese. Link. When they are connected by 

 little cross veins, the term is t venuloso-hinoideus. Id. 



22. f Venosus ; when the lateral veins are variously divided. Id. 



II. Of Individual Relative Terms. 



These are arranged under the heads of Estivation, or the relation which organs 

 bear to each other in the bud state ; Direction, or the relation which organs bear 

 to the surface of the earth, or to the stem of the plant which forms the axis, 

 either real or imaginary, round which they are disposed ; and Insertion, or the 

 manner in which one part is inserted into, or adheres to, another. 



1. Of Estivation. 



The term estivation, or prceftoration, is applied to the parts of the flower when 

 unexpanded ; and vernation is expressive of the foliage in the same state. The 

 ideas of their modifications, are, however, essentially the same. 



1 . Involute (involutiva, involuta) ; when the edges are rolled inwards spirally 



on each side (Link) ; as the leaf of the Apple. 



2. Revolute (revolutiva, revoluta) ; when the edges are rolled backwards 



spirally on each side (Link) ; as in the leaf of the Rosemary. 



3. Obvolute (obvolutiva, obvoluta, Link ; semi-amplexa, De Cand.) ; when the 

 margins of one alternately overlap those of that which is opposite to it. 



4. Convolute (convolutiva, convoluta) ; when one is wholly rolled up in another, 



as in the petals of the Wallflower. 



5. Supervolute (supervolutiva) ; when one edge is rolled inwards, and is 

 enveloped by the opposite edge rolled in an opposite direction ; as the 

 leaves of the Apricot. 



