365 



end in tlie apes (acrodronions \e:ns of' EttiNGHAüskn), tlie Jiext run 

 some way behveen tlie edge and the tii'st pair and ail or most of 

 tliem end in tlie tertiary net vvitliout uniting. 



The secondary veins tlins run parallel to the margin for a gi-eat 

 length and most of the basal veins |)artly embrace the higher ones. 

 A definition answering exactly to this nervafnre, I do not find in 

 Ettinghauskn. It forms a mixinre of the common camptotlroinous, 

 (bogenliinfige) with the acrodroDious {= spilzenlautige) nervalnre; 

 the term ainplexidromoun might be applied (see e.g. the fignres of 

 Thlbiiiidid species (acrodromons) in v. E.'s work, besides Neclandra 

 and other L((uniceae). The species with larger leaves C. jiavescens, 

 olaciformis, Beccnrii have a somewhat greater number of veins 

 (11 — 12), while the basal veins sometimes curve inward and unite 

 with the preceding: schlingenliiufige (brochidodromous) iiei'vatnre. 



The number of secondary veins of the deviating species C'. //«//^?n?7 

 amounts to 12; in the rather small leaves they are more crowded 

 and faiily equally divided over the length of the leaf, joining with 

 a curve. This is an instance of regular brochidodromous nervature, 

 but the leaf-base is pointed and the veins are ascendent and embrace 

 each other upward from the base, so that the character of the 

 genus is not quite lost. The tertiary uervatui'e is always clearly 

 visible and equally spread over the whole leaf; the horizontal 

 connecting veins are usually prominent and form a delicate lattice- 

 like I'eticulation. Leaf-impiessions made with carbon-paper usually 

 show only this net-work. 



4. Regarded biologically the leaves of Coptosapelta flavescens 

 belong according to Hansüirg (Phyllobiology, 1903, pag. 293) to the 

 Myrtvs- or Ldurnceae-iype with which he also classes the Coff'ea- 

 species together with numerous other Rubiaceae, among which 

 Crossoj>teryx, an african genus closely allied to CoptosapelUi. 



According to him these types are xerophilous. They belong to 

 the periodically dry and moist regions along the Mediterrarjean 

 from Spain to Palestine and also to tropical regions with similar 

 climatological properties. As their characteristics he gives : "Strongly 

 cutinized epidermis, rectilinear polygonal or sometimes undidated 

 epidermis-cells, stomata sunk, very glossy lamina usually bare, some- 

 times grey- or white velvety, simple, narrow and entire or round, 

 elliptical, oval and oblong, leathery ami stiff', as protection against 

 strong insolation, excessive evaporation, adhesion of water, winter- 

 temperature, etc. Without doubt many of these properties belong 

 to C. jiavescens, occurring in the secondary woods of the first zone, 

 a. 0. in bamboo-woods between 200 and 5U0 meters, but only on 



24* 



