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THE AMERICAN NATURALIST. [Vol. XXXVII. 



develop the next pair of leaflets proximally. Fig. 1 1 shows a 

 stronger growth with the same main features. Leaf number 5 

 although it has begun to develop the second pair of leaflets still 

 holds to the rounded form in the terminal leaflet. The next leaf, 

 number 6, however has become more split up and successive 

 developments of this character are shown in numbers 7 and 8. 

 The proximal part of the leaf here shows a failure to develop 

 full characters as seen in the more simple leaflets toward this 



Beneath the flower there is a gradual reduction of these charac- 

 ters and a return to leaves much like those of earlier growth as 

 shown both in the seedling and in the early spring growth, the 

 stages being in the reverse order of sequence. 



Lamium sp? (Dead Nettle). Figs. 12-18. 



In the seedlings raised, Fig. 12, the cotyledons were foliaceous, 

 glabrous, petiolate ; lamina oblong-reniform, deeply cordate at 

 the base with a slight distal median notch ; petiole nearly terete, 

 slightly flattened above. The petioles become 

 much elongated and grow upward for some time 

 with their bases nearly touching, petioles in speci- 

 mens raised were an inch long two weeks after 

 germination. The first nepionic leaves are 

 Yl> La)nhi»rf i r\ll °PP os i te an d at this time seem apparently sessile 

 yiedons, fim two as the strength seems to be used in the length- 

 ening of the first intermode ; later they become 

 petiolate. This is a progressive development of the proximal 

 portion during growth. These first leaves have an orbicular 

 form, crenate at the margin, a terminal rounded tooth and from 

 two to four lateral teeth on a side. Following leaves increase 

 the number of the lateral teeth and the broadest part of the leaf 



.rer the base than 



