﻿352 BOTANICAL GAZETTE [may 



discolor W. & N.; Rosmarinus officinalis L.; Ulex europaeus L.; Caly- 

 cotome spinosa Link.; Cytisus hirsutus L,; C. spinescens Sieb,, var. ramosis- 

 simus Ten,; C, Laburnum L,; Colutea arborescens L.; Anthyllis Barba-Jovis 

 L.; Ceratonia Siliqua L, 



Several of these species are also found in Ischia, but as 

 Gussone has not included them in his enumeration of the 

 macchie of that island, I have not ventured to put them in. 



On the mainland, from Cape Misenum to the end of the 

 Sorrento peninsula, the macchie consist mostly of some combina- 

 tion of the elements found in the preceding lists. A partial idea 

 of the numerical proportions of the species which compose these 

 plant societies may be gathered from enumerations to be given 

 in a subsequent paper on this topic. 



A typical Neapolitan macchia does not usually contain half 

 of the species comprised in either of the lists above given, and 

 may even consist of but three or four species, as is the case on 

 the flanks of Monte Nuovo, at the base of Cape Misenum. Here 

 the undershrubs are so scattering as to give no appearance of a 

 thicket, and are in general less than a meter in height. The 

 prevalent species are Spartium ju7iceti?n^ Cistus salvifolius^ Pistacia 

 Lentiscus^ and Erica arborea. In other cases, as in Capri, at the 

 foot of Monte Solaro, near the so-called Baths of Tiberius, from 

 the abundance of such large shrubs as Arbutus Unedo and well- 

 grown saplings of Quercus Ilex, much of the thicket is not less 

 than three meters in height. It is also, in this instance, pecu- 

 liarly difficult to traverse, on account of the abundance of such 

 climbers as Smilax aspera, Clematis Flatnmtila, and the very prickly, 

 herbaceous, trailing Asparagus acutifolius. 



What Drude calls Bestdnde, and Hult, Kjellman, and others 

 call "plant formations," ^^ rarely occur among the Neapolitan 

 macchie. Arid mountain slopes sometimes show patches of 

 Spartium almost unmixed with other undershrubs, and Cistus of 

 a single species sometimes covers considerable areas, to the 

 exclusion of other woody forms, but during the wet season many 

 herbaceous plants occur intermingled with these species. 



A large proportion of the shrubs which constitute macchie 



= Warming, Lehrbuch der okologischen Pflanzengeographie, zweite Auflage. 

 Berlin, 1902, p. 9. 



