Sterna callosa.
der. Anthers blackish. Stigma bifid. Receptacle naked. Seed conic,
pentangular, terminated by a short eroded paleaceous pappus. This
species, excepting in the calix, does not essentially differ from Hyme-
nopappus.”*
This is the first North American species of this Mexican genus which
has been discovered. Plant debile. Stem simple below, branched above.
Flowers peach-blossom-red, as they grow older they become very pale,
a faded red or almost white. Flower-buds deep lake-red. Stem light
siskin-green, argentine, and shining, rather rough to the touch, owing to
a very short, stiff pubescence, almost imperceptible except under a lens.
The leaves have a nerve on each side of the costa and near the margin,
which is somewhat channelled, or slightly scabrous; under a lens
covered with the same kind of hairs as are on the stem; the branches
which bear the flowers are without the argentine lustre, and more conspicuously
pubescent and roughish; peduncles, and forks which bear
them, covered with a conspicuous, glandular pubescence of a brown
colour; many of the leaves, particularly the branch leaves, arcuate, and
all of them, without exception, terminating in an obtuse, yellow, sphacelated
dot. Grows on the gravelly banks of the Arkansa, rare. Flowers
from September till October.
The table, Figure 1, Represents a flowering portion, of its natural size.
2. A flower, separated.
3. The same, magnified.
* Jour. Acad. Nat. Sc. Phil. 1821.