PENTANDRIA, DIGYNIA. 
147 
Resembles Smyrnium trifoliatum in habit and foliag’e ; 
and it has been supposed heretofore to be a mere variety of 
it. The flowers are, in the plant under consideration, dark 
purple. On the high rocks bordering the Schuylkill, east side, 
near the falls ; and in fields with Smyrnium trifoliatum ; not 
uncommon. Perennial. June. 
2. T. lower leaves subtriternate, upper biternate ; baibinod^ 
leaflets cuueate-ovate, acute or acuminate, un- 
equally and incisely serrate, entire towards the 
base ; umbels dichotomal and terminal ; invo- 
lucell subulate, unilateral, S-leaved ; fruit ellip- 
tic, T of the ridges alternately broader. Root 
perennial. Stem three feet high, dichotomous, 
angular, and grooved, smooth, excepting a mi- 
nute pubescence at the nodes, common in this 
and other genera. Leaves smooth, floral ones 
subopposite, all upon longish petioles, a little 
scabrous and whitish on the margin, serratures 
deep, large, unequal, and acute, commencing 
usually a little below the middle of the leaflet 
(leaflets 10 to 15 lines long.) Peduncles of the 
umbels rather short. Involucrum none. Um- 
bellets about 20-flowered, more than half of 
them abortive. Calix distinct, 5-toothed. Pe- 
tals deep yellow, acuminate, obliquely involute. 
Styles persistent, filiform, erect, about twice the 
length of the petals, with distinct but small stig- 
mas. Fruit nearly as large as that of the par- 
snip, elliptic in the outline. Seeds elliptic, con- 
vex, one of them with 2 broader alated lateral 
ridges, and the other with one dorsal alated 
ridge, margins alated, connivent, intervening 
elevations much lower. Seeds aromatic, and 
highly camphorated . — MctL 
Ligusticum ? barbinode, Mich. 
Smyrnium barbinode, Muhl. 
About two feet high. Joints of the stem bearded. Flowers 
yellow. On the high rocky banks of the Wissahickon, and 
the shady banks of the Schuylkill, near the falls; not common, 
Perennial. May, June. 
