AND GENERA OF PLANTS. 363 
nearly smooth. Stigma abrupt, pubescent, terminated by a minute cone. 
Rays about twelve to fourteen, retuse, and almost equally three-toothed.— 
A nearly smooth, stemless biennial, with opposite, pseudopinnate, almost 
capillary leaves; scapes or peduncles one-flowered, very long. Ray and disk 
yellow. 
Leptosyne Californica. ‘ 
Has. Near St. Diego, Upper California. Flowering in the beginning of May. About a foot 
high; scapes numerous, terete. Outer involucrum eight-leaved, linear, pubescent at base, as long 
as the inner, of which the divisions are ovate, and likewise eight. Rays about twelve to fourteen, 
styliferous, shortly three-lobed, the stigmas filiform, smooth; with an imperfect, flat, and smooth 
achenium. Receptacle elevated as the fruit becomes mature; pale flat, oblong-oval, or ovate, 
obtuse, membranaceous, deciduous, three-nerved in the centre; the achenium at first rather thin, 
scabrous, and scattered with short, glandular hairs, at length curved, with a thick, spongy margin, 
and often a similar, enlarged centre; the seed itself narrow-oblong. Allied to the section Chryso- 
melea of Coreopsis; but the peculiar character of the achenium and styliferous rays remove it. 
e J 4 
* TUCKERMANNIA. 
Capitulum many-flowered, heterogamous; rays feminine, fifteen to twenty, 
fertile; discal florets hermaphrodite, tubular, five-toothed. Stigmas ex- 
serted, the summit flat, beneath pubescent and obtuse, terminating in a very 
short cone. Receptacle paleaceous, flat; the pales oblong, membranaceous 
and nerveless. Involucrum double, the exterior shorter, leafy, six to eight- 
parted, the interior eight to ten-parted. Achenia elliptic, alated, flatly com- 
pressed and naked, smooth, without pappus, and, as well as the wing, dark 
brown.—A succulent, perennial plant of Upper California. Leaves alter- 
nate, bipinnatifid, smooth and fleshy; the segments linear and divaricate. 
Stem one to three-flowered, scapoid, the pedicel very long and naked. 
Flower large, resembling that of a Sz/phiwm; disk and ray yellow. Rays 
‘three-toothed at the apex, longer than the disk.—( Named in respect to Mr. E. 
Tuckerman, Jr., who has devoted his attention to the neglected Cryptoga- 
mous plants of the United States.) 
Tuckermannia * maritima. 
Has. On shelving rocks, near the sea, at St. Diego, in Upper California. A very showy and 
curious plant. Flowering in May. After the period of flowering it remains for a month or two 
