363 



two species from Borneo liist desciihed liere. were probably of a 

 similar liabit. Of Janowsky's species is only said: "10 Meters high"; 

 the piece of braiicii or stem, about as thick as a linger, gathered 

 by him, shows a soft whitish strongly-lobed wood-cylinder wilii 

 large vessels. 



^ 4. Stem and buds. Tlie rod-shaped twigs, as occurring in the 

 herbaria, are nearly cylindrical (only in some species e.g. C- montana 

 the utmost twigs are square), tlie nodes swollen and provided with 

 an annular groove. As a rule only the flowering lateral and terminal 

 branches are gathered, consequently but a few terminal buds, all 

 of young specimens of C. Jiave.'icens &nd C'. inonta7ia are present. These 

 are wanting bud scales; they are formed by the two youngest 

 leaflets, pressed together with the flat upper-surfaces, and ai'e enclo- 

 sed by the two rather small stipules only at the base. With the 

 young growing twigs these very young leaflets are lanceolate and 

 they consist more than half of a bi-oad " Vorl(iu/ers[)ltze" rounded 

 at the tip and certainly dark-green when alive (see Raciborski in 

 Flora 1900), reminding us of Dioscorea-species. Where there are 

 axillary-buds, they are but a couple of mms. long, ovate, covered 

 with long and dense hair. 



^ 5. I n d V m e n t. All species iiave a coat consisting of single 

 short appressed hairs, and long hairs lying flat but free at the top; 

 the latter are soft, straight, colourless or rarely (in sicco) yellowish, 

 usually thinly spread; on the young twigs and leaves, the inflore- 

 scences and generally also the petioles, they are closer together, 

 forming a soft, thin "tomentum". 



On the full-grown leaves they are almost or totally absent in 

 C. olaciforinis, fuscescens and malKensi.f, where the twigs also grow 

 bare in course of time. 6'. Grijf'itliii, C. Beccarii and a hairy type 

 of C. fiavescens have a soft hairy covering, consisting of long curved 

 hairs not close together. 



^ 6. Leaves: 1. Shape: In most species hitherto known, the almost 

 exact elliptical shape of the lamina is characteristic for the average- 

 leaf; i. e. a symmetry of the two halves with respect to the trans- 

 verse as well as the longitudinal diameter of the leaf, apart from 

 the frequently lengthened tip and wedge-shaped base. 



HooKKR (1882) and King (1903) refer to it in their descriptions of 

 C. Griffithü and 6'. fiavescens, MERUiLh of 6'. olaclformis, Wernham 

 of C. hameliaeblasta. 



24 



Proceedings Royal Acad. Amsterdam. Vol. XXVI. 



