234 



SYSTEMATIC BOTANY. 



small ; umbels with few rays ; umbellets with numerous rays ; involucre 6- 

 leaved, serrate ; sterile flowers numerous, on pedicels as long as the fertile, 

 sessile flowers ; style elongated, conspicuous and recurved. In thickets, 

 2-3-feet high. June-July. 



3. Cicuta. Calyx-margin with 5 broad teelh. Petals obcordate, 

 with an inflexed point. Fruit roundish. Carpels with 5 flattish, equal 

 ribs. Intervals filled with single vittse. Commissure with 2 vittse. 

 Carpophore 2-parted. Seeds terete. Involucels many-leaved. 



C. MACULATA ( Water Hemlock}. Stem smooth, hollow, often streaked 

 with purple ; lower leaves triternately divided ; upper ones biternately di- 

 vided ; leaflets lanceolate, serrate, smooth ; flowers white, in umbels ; invo- 

 lucel of 5-6 linear divisions ; calyx and style persistent ; root thick, fleshy, 

 poisonous. In wet meadows, 4-8 feet high. July-August. 



4. Sium. Calyx-margin 5-toothed or obsolete. Petals obcordate, 

 with an inflexed point. Fruit nearly oval. Carpels with 5 obtuse 

 ribs. Vittae usually several in each interval. Carpophore 2-parted. if 



5. LINEARE (Long-leaved Sium}. Stem angular, sulcate ; leaves pin- 

 nate ; leaflets linear, finely serrate ; flowers white, small ; involucres with 

 5-6 linear divisions ; calyx-teeth minute ; fruit obovate. A stout plant, 3-5 

 feet high. July. 



5. Cryptotaenia. Calyx-margin obsolete. Petals obcordate, with 

 an inflexed point. Fruit linear-oblong or ovate-oblong. Carpels with 

 5 equal, obtuse ribs. Vittae very narrow, twice as many as the ribs. 

 Carphohore free, 2-parted. y. 



C. CANADENSIS (Honewort}. Stem smooth, branching above ; leaves 

 3-parted, petiolate ; teeth coarse, mucronate ; umbels irregular, somewhat 

 paniculate, with very unequal rays ; flowers small, white ; involucres none ; 

 involucels few-leaved ; fruit oblong-elliptical. In moist woods, 1-2 feet high. 

 July. 



6. Carum. Calyx-margin obsolete. Petals obovate, emarginate, 

 with an inflexed point. Styles spreading, dilated at base. Fruit oval, 

 compressed laterally. Carpels 5-ribbed, lateral ribs marginal. Inter- 

 vals with single vittae ; commissure with 2. y. 



C. CARUI (Caraway). Leaves bi-pinnatifidly divided ; segments numer- 

 ous, linear ; involucre i-leaved, or none ; involucels none ; flowers white. 

 Cultivated for its aromatic fruit. June. 



7. Apium. Calyx-margin obsolete. Petals roundish, with an in- 

 flexed point. Fruit roundish, laterally compressed. Carpels 5-ribbed ; 

 the lateral ribs marginal. Intervals with single vittae. Carpophore 

 undivided. @ 



A. GRAVEOLENS (Celery}. Stem branching, furrowed ; lower leaves pin- 

 nately dissected, on very long petioles ; segments incised ; upper leaves 3- 



