870 THE AMERICAN NATURALIST. [VoL. XXXVI. 
Spirea salicifolia L. (Common Meadowsweet). 
This is not herbaceous, and the stem, unlike the others before 
noted, is woody, and the early spring growth is from the buds 
at the sides as well as new shoots from the ground. Sucha 
lateral growth is figured, Pl. III, Fig. 3. The first leaf indica- 
tions are mere bracts. The first of what may be called the true 
leaves is entire, lanceolate, with a simple median vein. This is 
the first in the series and the simplest. This seems to be a case 
like that noted under Aguzlegia canadensis, where a stage is 
found simpler than that of the ordinary seedling first stage, as 
the first nepionic leaves of two species of Spirzea as figured by 
Lubbock are like No. 2 of Fig. 3. The second leaf is cuneate 
and tridentate, trinerved, the broadest part near the tip. The 
third leaf is five-dentate like the second nepionic leaf figured 
by Lubbock. The complexity of dentations increases and the 
broadest portion of the leaf moves from near the tip to near 
the base. The leaves become doubly serrate, but the tip holds 
the form of the second leaf given, throughout. 
The spire formed by the flowers usually has one or more of 
the lower branches with more leaves than flowers, and here the 
reversal of the stages is well shown. Near the main stalk the 
leaves are typical, but moving distally along the branch they 
will be seen to lose little by little in the number of dentations. 
This keeps on until there are but three, as in the second leaf 
figured, and then there are several simple ones. The wedge 
shape, with its broadest part toward the tip, is not reassumed, 
but in dentations the stages are exactly reversed beneath the 
flowers. 
Tanacetum vulgare L. (Tansy). 
As far as was found, the seedling of this species has not been 
published, and therefore it is given in a little more detail than 
the others (Pl. III, Figs. 4 and 5). 
Cotyledons glabrous, subfleshy ; lamina oblong, obtuse, ses- 
sile. The first nepionic leaves are paired and vary considerably. 
. As a whole they are spatulate, obtuse, and may be distally 
