682 FLORA. 



30. CYNOSCIADIUM DC. 



Glabrous annuals, the lower and basal leaves mostly linear and entire, those of 

 the stem mainly divided into few linear segments. Involucres and involucels of 

 several subulate or narrowly linear bracts. Flowers small, white, in compound 

 umbels. Calyx-teeth short, persistent. Fruit ovoid, or oblong, nearly terete, 

 strongly ribbed, the lateral ribs the larger; oil-tubes solitary in the intervals and 2 

 on the commissural side of each carpel. Seed-face flat. Stylopodium conic. 

 [Greek, dog-celery.] Two known species, natives of the southern U. S. 



i. Cynosciadium pinnatum DC. PINNATE CYNOSCIADIUM. (I. F. f. 2659.) 

 Stem 3-6 dm. high. Lower and basal leaves petioled, the blade elongated-linear, 

 entire, acuminate or acute at each end, 2-8 cm. long; stem-leaves pinna tely divid- 

 ed into 3-9 linear entire segments, the terminal segment much larger than the 

 lateral ones, or some of them entire; bracts 4-6 mm. long; umbels 4-io-rayed; rays 

 very slender; fruit about 4 mm. long, less than 2 mm. wide, crowned by the ovate 

 calyx-teeth. In wet soil, Mo. to the Ind. Terr, and Tex. May-Aug. 



OEnanthe aquatica (L.) Poir., a tall usually aquatic herb with finely dissected leaves, 

 the umbels mostly opposite them, the involucre wanting and the involucels of small 

 bracts, has been found as a fugitive at Washington, D. C. \OE. Phellandrium Lam.] 



31. LILAEOPSIS Greene. 



Small creeping glabrous perennial marsh herbs, the leaves reduced to linear 

 terete septate hollow petioles, with simple umbels of white flowers. Bracts of the 

 involucre several, small. Calyx-teeth acute. Stylopodium conic. Fruit glabrous, 

 globular, somewhat flattened laterally. Carpels nearly terete, the dorsal and inter- 

 mediate ribs filiform, the lateral ones much larger and corky-thickened, the com- 

 missural faces each with a corky longitudinal projection; oil-tubes solitary in the 

 intervals. Seed terete. [Greek, resembling the genus Lilaea.~\ A small genus of 

 wide distribution. 



I. Lilaeopsis lineata (Michx.) Greene. LILAEOPSIS. (I. F. f. 2658.) Root- 

 ing in the mud, 5-13 cm. long. Petioles linear-spatulate, obtuse, generally 2-8 

 cm. long, but sometimes longer, about 3 mm. thick; peduncles somewhat exceeding 

 the leaves ; umbels 5-io-rayed, the rays 3-6 mm. long; fruit about 2 mm. long. In 

 salt and brackish marshes, and on river-shores, N. H. to Fla., west to Miss. 

 June-Aug. 



32. AETHUSA L. 



Annual glabrous herbs, with pinnately dissected leaves, and compound umbels, 

 both terminal and opposite the leaves. Involucre none, or of a single bract. Bracts 

 of the involucels 1-5, setaceous, turned to one side. Calyx-teeth obsolete. Stylo- 

 podium broad, thick. Fruit globose-ovoid, glabrous. Carpels dorsally compressed, 

 the ribs prominent, corky, acute, nearly equal; oil-tubes solitary in the intervals. 

 Seed-face flat. [Greek, burning, from the sharp taste.] A monotypic genus of 

 Europe and Asia. 



i. AEthusa Cynapium L. FOOL'S PARSLEY. (I. F. f. 2656.) Erect, leafy, 

 dichotomously branched, 3-8 dm. high. Leaves 2-3 -pinnate; petiole-bases dilated; 

 ultimate segments linear, acutish ; umbels long-peduncled, 5-8 cm. broad in fruit, 

 8-i2-rayed; pedicels 2-8 mm. long; fruit about 3 mm. long. In waste places, N. 

 S. to N. J. and Minn. Poisonous. Adventive from Europe. June-Sept. 



33- FOENI'CULUM Adans. 



Erect glabrous herbs, with pinnately decompound leaves, the segments linear or 

 capillary, and compound umbels of yellow flowers. Involucre and involucels none. 

 Calyx-teeth obsolete. Stylopodium large, conic. Fruit linear-oblong, glabrous, 

 terete, or nearly so. Carpels half-terete, dorsally flattened, prominently ribbed; 

 oil -tubes solitary in the intervals. Seed-face flat, or slightly concave. [Latin, 

 diminutive of foenum, hay, from its odor.] About 4 species, of the Old World. 



i. Foeniculum Foeniculum (L. ) Karst. FENNEL. (I. F. f. 2669.) Peren- 

 nial, 6-12 dm. high. Leaves dissected into capillary segments; petioles broad, 

 clasping; umbels large, 9-25 -rayed, the rays rather stout, somewhat glaucous, 

 2-8 cm. long in fruit; pedicels 2-8 mm. long; fruit about 6 mm. long. In waste 



