Erigenia. LXVII. UMBELLIFER^. 293 



leaves about, 4" bv 1". Umbels quite irregular, often with leaves in the place 

 of the involucre. Rays 1 — 4, 1 — 4-flou'erecl, about 2' long. Petals while. Apr. May. 



27. OSMORHIZA. Raf. 



Gr. otTftrj, perfume, pi^a, root; from the anisate, aromatic root. 



Calyx margia obsolete ; petals oblong, nearly entire, the cuspidate 

 point inflexed ; styles conical at base ; fruit linear, very long, clavate, 

 attenuate at base ; carpels with 5 equal, acute, bristly ribs ; intervals 

 "without vittae ; commissure with a deep, bristly channel. — % Lvs. 

 hiLeriiately divided^ with the umbels opposite. Livol. few-leaved ; iyivolu- 

 ccls 4 — 7-leaved. JFls. tvhite. 



1. O. LONGisTYLis. DC. (Uraspermum. Claytoni. Nutt.) Sweet Cicely. 

 (S<?/. hliibrm, nearly as long as the ovary;//", clavate. — A leafy plant, 



very common in woods, Can. to Va., 1 — 3f high, with inconspicuous umSels 

 of white flowers. Root branching, flesh}', ot an agreeable, spicy flavor. Stem 

 erect, branching above, nearly smooth. Rout leaves on long, slender stalks, the 

 upper stem leaves sessile, both decompound, the ultimate divisions often pin- 

 nate ; leaflets irregularly divided by clefts and sinuses into lobes and teeth, the 

 lobes broadly ovate, slightly pubescent. Involucres of linear bracts longer than 

 the rays. Fruit blackish, an inch in length, much more acute at the basethan 

 at the summit, crowned with the persistent styles. May, Jn. 



2. O. EREvisT-i'Lis. DC. ( U. hirsutum. Bio.') Short-styled Cicely. 



Sty. conical, .scarcely as long as the breadth of the ovary; fr. somewhat 

 tapering at the summit. — Common in woods, Can. to Penn. W. to Oreg. The 

 general aspect of this species is very similar to that of the preceding, but the root 

 is destitute of the anise-like flavor of that species, being disagreeable to the taste. 

 The plant is more hair}', and with more deeply cleft divisions in the leaves. 

 Involucre deciduous. Umbels with long, diverging rays, of which but few 

 prove fertile. The fruit is similar to the last, but crowned with convergent, not 

 with spreading styles. May, Jn. 



28. CONIUM. 



Gr. Kwvtiov, hemlock, from xtji^os, a top; because it causes dizziness. 



Calyx margin obsolete ; petals obcordate, with an acute, inflected 

 point ; fruit ovate, laterally compressed ; carpels with 5, acute, equal, 

 undulate-crenulate ribs, lateral ones marginal ; intervals without vit- 

 tse ; seeds with a deep, narrow groove on the face. — ® Foisonous herbs. 

 Lvs. decompound. Iiivol. and involuccls 3 — 5-lcaved, the latter unilate- 

 ral. JFls. white. 



C. MACL'i,ATUM. Poisnn Hemlock. 



St. spotted; lvs. tripinnate; //I'5. lanceolate, pinnatifid;/r. smooth. — Grows 

 in waste grounds, way-sides. A well known poisonous plant. Stem much 

 branched, about 4f high, very smooth, round, hollow, with purplish spots. The 

 lower leaves are very large, several times pinnate, bright green, on long, sheath- 

 ing foot-stalks. Umbels terminal, the involucre of 6—8 lanceolate bracts, the 

 involucels with the inner half wanting. Flowers small, white. Fruit with un- 

 dulate or wrinkled ribs. The piant is a powerful narcotic, exhaling a disa- 

 greeable odor when bruised. Used in medicine. Jl. Aug. () 



Suborder 3.— C (ELiOSPERM^. 



Seeds incurved at base and' apex. 



29. ERJGENIA. Nutt. 



Gr. Tjpiyevtta, daughter of the early sprin? ; for its early flowering. 



Calyx limb obsolete ; petals flat, entire ; fruit contracted at the 

 commissure ; carpels 3-ribbed, ovate-reniform. — % Rt. tuberous. Radi- 



