UMBELLIFER^. 141 



Rich moist wool-: common. May, June. Stem 2 to 3 feet high, branching, 

 purplish, nearly smooth, striate. Leaves mostly bi-ternate, those of the root on 

 long petioles; leaf, ts oblong ovate. Flowers white, much larger than in the next. 

 Fruit blackish, one inch in length, crowned with the persistent styles. Hoot with 

 the flavor of anise. 



2. 0. brevistylis, DC Short-styled Cicily. 



Leaflets pinnatifid cut, acuminate, downy-hairy; styles conical, not longer than 

 the breadth of the ovary ; fruit somewhat tapering at the summit. 



Moist rocky shady places ; commoner than the last. May, June. Stem about 2 

 feet high, branching, pale-green, at length smooth. Leaves bi-ternate; leaflets 

 a pinnatifid. Fruit similar to the last, but crowned with convergent 

 styles. Root nearly tasteless, said' to be poisonous. 



21. CONIUM. Linn. Poison Hemlock. 



Kcmiecm, the Greek name of the Hemlock by which criminals and philosophers 

 were put to death at Athens. 



Calyx-teeth obsolete. Petals obcordate, with an acute 

 inflected point. Fruit ovate, flattened at the sides; the car- 

 pels with 5 prominent waving ribs; inner face with a deep 

 narrow groove; vittas none. — Biennial poisonous herbs, with 

 large ob-compound leaves, 3 tob-leaved involucres andinvolu- 

 cels, and white flowers. 



C. maculatum, L. Poison Hemlock. 



Stem spotted; leaves tri-pinnate; leaflets lanceolate, pinnatifid; involucels shorter 

 than the umbel-lets; fruit smooth. 



Waste places, naturalized along Chillisquaque creek, Montour county. A largo 

 branching herb, about 4 feet high, very smooth. Stem much branched, round, 

 hollow, with purplish spots. Lower leaves very large, bright green, on long 

 sheathing foot-stalks. Umbels terminal, the involucre with 5 to 8 lanceolate bracts, 

 the involucels with the inner half wanting. I lowers small, white. Whole plant 

 highly poisonous; fetid when bruised. 



Sub-order III. CCELOSPERMJE. 



Seeds incurved at base and apex. 



22. EEIGENIA. Nutt. 



Greek erigerefa, a name of Aurora, the harbinger of day, or of the spring; cm 

 account of its being the first con>pi:uous flowering plant in the U. S. Nutt. 



Calyx-teeth inconspicuous. Petals obovate or spatu- 

 late, flat, entire. Fruit somewhat laterally compressed, 

 reniform or termined with 5 very slender acute bristly ribs. — 

 A smooth and slender perennial, with 2 to 3 ternately divided 

 haves, a somewhat leafy bracted compound umbel } with white 

 flowers. 



E. bullosa, Nutt. Bidbous Erigcnia, 



Alluvial soil ; Western part of the State. Marc h, April. Root globose, tuberous 

 Stem simple, 4 to 5 inches high, 2 leaved. Lencs 3-partcd; divisions eub-pir 

 Umbels terminal, 3 to 5-flowered. Flowers white. 



