7 
of about 20 capillary bristles. Embryo small; hypocotyl as 
long as or longer than the cotyledons, terete as is the whole 
embryo when the cotyledons are placed face to face.* 
The cotyledons of the seedling plant are small, orbicular, the 
blade bent at an angle with its petiole. Petiole evident, but not 
long. Hypocotyl short, tap-root branching early. The hypocotyl 
soon bears roots up to the very base of the cotyledons. All the 
internodes lengthen. Leaves opposite. The first, second and third 
pairs are less and less petioled; the fourth pair are clasping, and 
the succeeding pairs are more or less perfoliate. The first and 
second internodes, and the accompaning leaves are less hairy than 
the remainder of the plant. The third and succeeding pairs of 
leaves take on more or less of the rugose character of the later 
ones. They also resemble the leaves of the mature plant in form. 
The plant does not blossom the first year, but grows to a height 
of a foot or more. : 
Solidago serotina, Ait. (PLarE CXXXIV. E-H.) The akene in 
this species is 10-costate and somewhat hairy, about one and 
three-fourth mm. long and one-third mm. wide. The pappus 
is nearly twice as long as the akene. The cotyledons in the 
seed are longer than the hypocotyl. The embryo tapers toward 
the base. 
In the seedling the cotyledons are rather small, obovate-spatu- 
late, short-petioled, hypocotyl as long as or longer than the cotyl- 
edons. The tap-root is soon indistinguishable from the other 
roots. The first internode elongates but little. The succeeding 
are gradually longer. The first leaf resembles the cotyledons 
in shape, but is ciliate along the margin, while the cotyledons are 
not. The hairs forming the cilia are upon the margined petioles 
of all the early leaves. They are longest at the sheathing base of 
the petioles, and grow shorter toward the apex of the leaf. Along 
the margin of the leaf they form merely a roughness. The early 
leaves are only faintly triple nerved. The tap-root is soon lost 
* The statement made in the “ Synoptical Flora of North America,” (p. 48), to 
the effect that the ovule becomes “an exalbuminous seed with a straight embryo, the 
inferior radicle (hypocotyl) shorter and narrower than the cotyledons” is erroneous. 
In several, if not all the Zupatoriums and in Mikanta scandens, the hypocotyl is as 
long as or longer than the cotyledons, and nearly, if not quite as broad. | 
