OMBILLIFERJE. 157 LIGUSTICUM. 



rays. Involucels of a few minute, subulate bracts. Leaves irregularly de- 

 <;ompound, on a dilated foot-stalk, sheathing at the base. Calyx teeth obso- 

 lete. June. Per. Entire-leaved AUxanders. 



7. CICU'TA. 

 Umbel perfect; involacre few-leaved orO ; involucels manj- 

 leaved; fruit subglobose; carpels with 5 flattish, equal libs. 

 2 of them marginal; seeds terete. 



A Latin name used by Virgil (Ec. 2d and 5th), but of unknown application. 

 — Poisonous herbs, perennial, aquatic. Stems hollow. Flowers white, all 

 perfect and uniform. Cal. of 5 broad, acute leaves. Pet. obcordate, the end 

 inflected. Fil. loRg as corolla. Carpophore 2-parftd. 



1. C. macula'ta. 



Stem spotted ; le&ves oblong, mucronately serrate. A common plant, 3 — 

 <5 feet high, in wet meadows. Stem smooth, hollow, striate, jointed, glaucous, 

 branched at top. Leaves compound, the lower ones thrice lernate, the upper 

 ones lernate-. Petioles dilated at base into long, abrupt, clasping stipules. 

 Leaflets acuminate, finely serrate. Umbels without the universal involucra, 

 partial umbels with short, acute, and narrow-leaved involucels. Fruit round- 

 ish, flattened, lO-furrowed, crowned with the permanent calyx and styles, and 

 separating transversely into 2 seeds. Flowers white. A dangerous poison, 

 ibut sGuaelimes used in medicine. JI. Aug. Per. American Hemlock. 



2. C. bulbi'fera. 



Leaves decompound, with axillary bulbs ; leaflets linear, with remote, di- 

 vergent teeth. Known by its slight, attenuated foliage. Wet meadows. 

 Stem 3 — 4 feet high, round, hollow, striate, green, with axillary branches. 

 Leaves various, those oi the stem generally biternate, those of the branches 

 ternale. Leaflets long, narrow, linear and linear-lanceolate, with narrow, 

 lecurved teeth. Bulblets situated upon the branches, opposite, and within the 

 axils of the bnicteate leaf-stalks. Umbels terminal, with no universal invo- 

 lucra. Partial umbels of close, small, white flowers, and a slight involucel. 

 August. Ann. Bulbiferous Cicula. Karrow-leaved Hemlock. 



8. THA'SPIUM. 



Involucre 0; involucels o-leaved, lateral; fruit elliptical; 

 carpels convex, with 5 win^^ed ribs,. 



Perennial herbs, with yellow or purple flowers. 



J;. CORDA TUM. JV««. Sinyrnium cordatum. Mx. Zizia cordalum. Dc. 



Radical leaves simple , cordate, crenate; cauline ones ternate, stalked ; seg- 

 ments acute, serrate; umbels terminal Shady hills. Stem erect, slightly 

 branched, smooth, 2—3 feet high. Root leaves on long stalks, roundish-lieart- 

 shaped, the rest ternale, becoming only 3-parted above, all light green. Um- 

 bels dense with yellow flowers. Fruit black, oval, with 3 prominent, round- 

 ed, depressed ridges on each side. May. Jn. Per. Heart-leaved Mexunders . 



9. LIGU'STICUM. 

 Fruit oblong; carpels with 5 acute, equal furrows; petals 

 equal, involute, entire; umbels perfect ; involucre none. 

 



