152 



WEEDS AND USEFUL PLANTS. 



guished by its unspotted stem, the long pendulous one-sided involucels 

 and the straight ridges of the fruit. 



10. PETKOSELI'NUM, Hoffm. Parsley. 



[Greek, Petra, rock, and Selinum; Rock Selinum, — from its native habitat.] 



Fruit ovate. Carpels with 5 equal ribs. Channels with single oil-tubes 

 and two on the inner face of the carpels. Involucre few-leaved. Invo- 

 lucels many-leaved. Stems somewhat angular. Leaves decompound. 

 1. P. sATi'vuM, Hoffm. Segments of the lower leaves cuneate-ovate, 

 trifid and incised-dentate, — of the upper ones linear-lanceolate and nearly 

 entire ; involucels subulate. 

 Cultivated Petroselinum. Parsley. 

 Fr. Persil. Germ. Die Petersilie. Span. Perexil. 



Plant smooth. Root biennial. Stem 2-4 feet high, striate with green and yellowish 

 stripes, branched. Leaves shining green, the lower ones much dissected. Umbels terminal 

 and axillary, pedunculate. Involucre of a single leaflet (or sometimes 2-3) huear. Invo- 

 lucels of 5 - 6 short subulate leaflets. Petals greenish-white. Fruit ovate. 



Gardens : cultivated. Native of Eastern Europe. Fl. June. Fr. August. 



Ohs. Cultivated for the pleasant-flavored leaves which are used in 

 culinary processes. The root has long been a popular diuretic. The 

 var. cRispuM, or Curled Parsley — with the segments of the lower leaves 

 broader, and curled on the margin — is also frequent in kitchen gardens. 



11. CICU'TA, L. Water-hemlock. 



[Latin name of the Hemlock.] 



Calyx with 5 minute teeth. Fruit roundish. Carpels with 5 equal flat- 

 fish ribs, with a single oil-tube in each interval. Involucre few-leaved. 

 Involucels many-leaved. Sub-aquatic herbs. Stem terete, smooth, fistular. 

 Leaves tripinnately or triternately dissected. 



1. C. macula'ta, L. Stem spotted or streaked ; 



leaves bi- or tri-teruately divided, — the segments 

 lanceolate, mucronately serrate, the nerves ter- 

 minating in the notches. 



Spotted Cicuta. Spotted Cow-baue. Water 

 Hemlock. 



Root perennial, with thick oblong fleshy fibres. Stem 4-6 

 feet high, branching, dark purple, or striate with green and 

 IQQ 107 purple or brown ; leav^ smooth, the lower ones on rather 



long petioles, triteriiiitoly dissected with the terminal 

 division mostly in fives ; segments or leaflets 2-3 inches long, petiolulate, penninerved— 

 the nerves (as remarked by Dr. Bigelow,) running to the notches of the serratures instead 

 of the points. Umbels spreading ; rays slender. Involucre 0 or 1 - 2 linear leaflets. Invo- 

 lucels of 5 - 6 small lance-linear leaflets. Petals white. Fndt nearly round ; ribs rather 

 broad ; channels reddish-brown or dark purple, filled with aromatic oily matter. 



Fig. 106. The fruit of the Water Hemlock [Cicuta muculata]. 107. A section of tlio 

 same 



