110 Class V. Order U. 



116. HERACLEUM. 

 HERACLEUM LANATUM. Mich. Cow Parsnep. 



Leaves ternate, woolly underneath, leafets petioled 

 roundish-heart shaped, lobed ; fruit orbicular. Mich, 

 abr. 



One of the largest of our umbelliferous plants. Petioles and 

 nerves of the leaves channelled, bristly. Leafets large, woolly 

 on the under side, deeply cut into lobes, which are again cut, 

 and unequally serrate. Umbels radiate, often a foot wide. Pe- 

 duncles furrowed. Leafets of the involucres lanceolate, tapering 

 to a very long point, deciduous. Flowers white. Petals heart 

 shaped with a very deep inflected sinus. Seeds thin, round-oval, 

 emarginate, marked with three short lines. South Boston, Dor- 

 chester. June. Perennial. 



117. CONIUM. 

 CONIUM MACULATUM. L. Hemlock. 



Bigelow, Medical Botany, PI. xi. 



Fruit unarmed, with the ridges undulated. 



A well known poisonous plant used as a narcotic in medical 

 practice. Root biennial, somewhat fusiform and generally branch- 

 ed. Stalk round, very smooth, striated, hollow, jointed, and 

 more or less marked with purplish spots. Leaves two or three 

 times pinnate, of a very bright green, with long sheathing peti- 

 oles inserted on the joints of the stem ; the leafets pinnatifid and 

 toothed. Flowers in terminal umbels, the general involucre 

 with half a dozen lanceolate, reflected leafets, the partial invo- 

 lucre with three or four situated on the outside. Flowers very 

 small, white. Petals five, oval with their points inflexed. Sta- 

 mens five, spreading, about the length of the corolla. Germ in- 

 ferior. Styles two, reflexed outwardly. Fruit roundish-oval, 

 compressed, ribbed, the ribs being transversely wrinkled or cre- 

 nate, separating into two oblong hemispherical seeds. In waste 

 ground and road sides. June. Biennial. 



118. ANGELICA. 



ANGELICA TRIQ.UINATA. Mich. Common Angelica. 



Petiole three parted, its divisions pinnate-five leav- 



