366 



adult old plants, tlie leaves of uliicli are indeed rather like those 

 of Cojf'ea arabicn. Also the tomentose leaves of 6'. Beccarii and 

 C. Grijfithil belong to this type. On the other hand C. Janowskii 

 and C montnna are both mountain-plants with narrower leaves and 

 a long dropping-point, instances of Hansgirg's "ficus-type of the rain- 

 tooods" . To this tjpe tiie young plants of the above-mentioned 

 species also approach, in wliicli the xerophilous habit does not 

 much come to the fore. 



Here it is not only the danger of too strong evaporation, brought 

 along by the succession of the monsoons, but no less the lisk of 

 the damage, caused by strong rainfall which prevails. 



Among the remaining species, of which C. mulnensis does not 

 grow higher than 200 meters above the sea-level, while the others 

 occur at different levels in the mountains, various transitions between 

 Hansgirg's Mijrtus- and Ficus-type are found. 



An instance of real xerophilous habit is only given bij C'. Hammii 

 (Lindeniopsis) which as I previously mentioned should be classed 

 with Schimpkr's "Hartlaub formation". 



§ 7. Stipules. The usual shape of the stipules is that of a 

 small triangular scale, which has often been lost witii the full-grown 

 twigs in the herbaria. At the back-side and along the edges it is 

 covered with hairs, turned to the front, often longer than the stipule 

 and sometimes covering it entirely. The variations in shape are 

 usually due to differences in the ratio of width and length, which 

 depends on the width of the node. Sometimes however they may 

 be of use in the determination of the species. This is for instance 

 the case with C. ^fiavescens and C- olncifovmis, which show a great 

 resemblance on superficial contemplation of leaves and flowers and 

 were considered identical by Mk.rkill. 



Here, in numerous specimens examined by us, the stipules are 

 quite sufficient to distinguish between the two species. C. flavescens 

 has linear-lanceolate ones, rather abruptly passing into the broad 

 base. They vary in length between 4 and 8 mms. and strike the 

 eye in the herbaria because, at least in the dry specimens, the 

 back-side is absolutely bare and the broad hairy edges show clearly. 

 C. olaciformis has smaller stipules, usually only 2 mms., slightly 

 longer than broad, in old condition hairless and swollen at the 

 base. This description has been taken from a specimen, distributed 

 by Merril himself from Luzon (Ph. pi. 396) and classified as 

 C. flavescens. It is also applicable to Elmer's original specimen (see 

 below ^ 11. Synonymy and relationships). 



