258 Key to the System of 



1184. Vestiture without any lustre. 



Finally rather tall or even somewhat arborescent ; vestiture 

 thin, greyish or whitish ; leaves from elliptic to ovate, 

 flat, almost smooth above; panicles comparatively ample; 

 fruitlets opening by a large lid. P. cinerea. 



Vestiture very shining. 



Finally rather tall ; vestiture grey-brownish, dense ; leaves 

 ovate-lanceolar, flat, smooth above ; panicles compara- 

 tively long ; fruitlets opening by a large lid, enclosed to 

 the middle. P. ligustrina. 



1185. Leaves from obcordate- to obovate-orbicular. 



Bather tall ; vestiture thin, greyish or whitish ; leaves very 

 small, flat; flowers few or only two together or even 

 solitary ; fruitlets much exserted. P. elachophylla. 



Leaves from linear- to narrow-elliptical. 



Never tall ; vestiture greyish, partly spreading; leaves 

 quite small, re volute at the margin ; flowers few together, 

 very small; fruitlets much exserted. 



P. phylicifolia. 



1186. Leaves and panicles relatively large. 



Finally very tall and often arboreous; vestiture greyish 

 or brownish; leaves from lanceolar to almost ovate but 

 nearly always acute, usually flat ; calyx-lobes for a long 

 while persistent ; fruitlets enclosed to the middle, 

 opening tardily by a rather small aperture. 



P. apetala. 



Leaves and panicles relatively small 1187 



1187. Leaves much wrinkled above. 



Finally tall and even somewhat arborescent; vestiture short, 

 greyish ; leaves from almost elliptical to ovate ; flowers 

 quite small ; fruitlets much exserted, opening tardily by 

 a large lid. P. subrepanda. 



Leaves slightly wrinkled above ... ... ... 1188 



1188. Panicles formed of almost capitular umbels. 



Rather tall ; vestiture short, close ; leaves from lanceolar 

 to elliptical-ovate ; fruitlets high-enclosed, opening by a 

 rather large lid. P. primifblia. 



