112 



ROSACEAE. 



Rhodotypos. 

 (Family Rosaceae). 



Spreading rather low shrubs: 

 deciduous. Twigs round, moder- 

 ate: pith moderate, round, con- 

 tinuous, white. Buds moderate, 

 becoming collaterally branched 

 and at length very slightly stalked, 

 ovoid, with some half-dozen pairs 

 of glabrate exposed scales. Leaf- 

 scars opposite, crescent-shaped or 

 somewhat 3-s i d e d, moderately 

 small, somewhat raised, ciliate at 

 top like the line by which they 

 are connected: bundle-traces 3: 

 stipule-scars lacking. 



The opposite leaves of Rhodo- 

 typos present a rare exception to 

 the general rule that the leaves 

 of Rosaceae are alternate, which 

 to a novice is one of the easily 

 learned characters by which 

 woody Rosaceae may be dis- 

 tinguished at a glance from woody Saxifragaceae, to which 

 they bear a close resemblance sometimes. 



From a study of the vascular arrangement in multiple 

 buds, Baldacci and Filipucci have shown in the second vol- 

 ume of the Bulletin of the Boissier Herbarium that in Rho- 

 dotypos, as in Goriaria and many other cases, the supernu- 

 merary buds are derivatives of the normal axillary bud and 

 not independent structures. 



Winter-characters are figured by Schneider, f. 137. 

 Twigs olive-brown, glabrate. R. kerrioides. 



