UMBELLIFKE^. (PAKSLEY FAMILY.) 157 



20. CICtlTA, L. Watek Hemlock. 



Calyx minutely 5-toothed. Fruit Bubglobose, a little contracted at the sides, 

 the carpels with 5 flattish and strong ribs : intei-yals with single oil-tubes. — 

 Marsh perennials, very poisonous, smooth, with thrice pinnately or temately 

 comDound leaves, the reins of the lanceolate or oblong leaflets terminating in 

 the notches. Involucre fow-leaved : involucels many-leaved. Flowers white. 

 (Tlie ancient Latin name of the Hemlock.) 



1. C maciilsita, L. (Spotted Cowbane. Musquash-boot. Be4- 

 VEK-PoisON.) Stem streaked with purple, stout ; kajlets oblong-lanceolcde, 

 coarsdy seirate, sometimes lobed, pointed. — Swamps, common. Aug. — Flant 

 3° - 6° high, coarse ; the root a deadly poison. 



2. C> Itulbifera.) li. iSco^eis /t'near, remotely toothed or cut-lobed ; upper 

 axils bearing clusters of btdblets. — Swamps ; common northward : seldom ripen- 

 ing fruit. 



21. SilTM, L. Water Parsnip. 



Calyx-teeth small or obsolete. Fruit ovate or globular, flattish or contracted 

 at the sides ; the carpels with 5 rather obtuse ribs : intervals with 1 - several 

 oil-tubes. — Marsh or aquatic perennials, smooth, poisonous, with grooved 

 stems, simply pinnate leaves, and lanceolate serrate leaflets, or the immersed 

 ones cut into capillary divisions. Involucre several-leaved. Flowers white. 

 (Name supposed to be from the Celtic siu, water, from their habitation. ) 

 # Pericarp thin between the strong projecting ribs : lateral ribs marginal. 



1. S. liueare, Michx. Leaflets linear, lanceolate or oblong-lanceolate, 

 tapering gradually to a sharp point, closely and very sharply serrate ; calyx- 

 teeth scarcely any; fiuit globular, with corky and very salient ribs, or rather 

 wings ; oil-tubes 1 - 3 in each interval. — Swamps and brooks ; common. July 

 - Sept. 



S. LATiFOLiuM, L., of Europc, I have never seen in this region. 

 * Pericarp of a thick texture, concealing the oil-tubes : ribs not sti-ong, the lateral not 

 quite marginal, (Bferala, Koch.) 



2. S. angusti folium, L. Low (9'- 20' high); leaflets varying from 

 oblong to linear, mostly cut-toothed and cleft ; fruit somewhat twin. — Michigan 

 and westward. (Eu.) 



22. CRYPTOTifeNIA, DC. Honewort. 



Calyx-teeth obsolete. Fruit oblong, contracted at the sides; the carpels 

 equally and obtusely 5-ribbed : oil-tubes very slender, one in each interval and 

 one under each rib. Seed slightly concave on the inner face. — A perennial 

 smooth herb, with thin 3-foliolate leaves, the umbels and umbellets with very 

 unequal rays, no involucre, and few-leaved involucels. Flowers white. (Name 

 composed of KpvirTOS, hidden, and raivia, a filet, from the concealed oil-tubes.) 



1. C Canadensis, DC. — Rich woods, common. June -Sept. — Flant 

 2° high. Leaflets large, ovate, pointed, doubly serrate, the lower ones lobed. 

 14 



