DEVELOPMENT OF LEAVES AND STIPULES 57 



in previous cases. The second leaf, occurring at the 

 twelfth node, has a more elongated lamina, though still 

 rather imperfect. The stipules are well developed, and 

 as in the previous case, they cover about three -fourths 

 of the bud. Succeeding ones are very minute, and 

 appear to be perfect leaves. No free petiole is to be 

 seen at this stage of the bud in winter, the stipules 

 being adnate along the whole length of the midrify so 

 that the lamina of the leaf is sessile. 



The above description was made from an average 

 bud on a strong shoot. Buds on weak shoots have 

 fewer scales. Buds examined in January were still dor- 

 mant, or nearly so ; and this applies to most or all of the 

 British Eoses. Some exotic species, such as Rosa indica, 

 R. multiflora, and others of that type, are almost burst- 

 ing into leaf at the same date, if the weather is at all 

 mild. The appearance of a developing bud in spring, 

 with one leaf nearly expanded, is given in fig. 95. 



In the Rose, as we have seen, the development of 

 the leaflets proceeds from above downwards, the upper 

 leaflets being the older. This mode of growth, there- 

 fore, has 'been termed ' basipetal' (fig. 97). The same 

 sequence is followed by many other Roscicece, Valeriana, 

 Melianthus, Reseda, Grasses, Cyperaceoe, Lilies, Orchids, 

 and probably all Monocotyledons. 



On the other hand, there are also species in which 

 the reverse takes place i.e., in which the lowest lobes 

 are the oldest, and others are developed upwards, i.e., 



