UMBELLIFERAE (I'AUSLKY FAMILY) 



615 



1. P. HORTKNSK Hoffm. (COMMON P.) Leaflets small, ovate, 3-cleft or 

 -toothed. (P. sdtivum Hoffm.; Carum Petroselinum B. & H. ) Commonly 

 cultivated in market gardens, and occasionally found as an escape. (Introd. 

 from the Mediterranean region.) 



is. BERULA Hoffm. 



Calyx-teeth minute. Fruit emarginate at base, glabrous ; carpels nearly 

 globose, with very slender inconspicuous ribs and thick corky pericarp ; oil-tubes 

 numerous and contiguous about the seed-cavity ; seed terete. 

 Smooth aquatic perennial, with simply pinnate leaves and vari- 

 ously cut leaflets, usually conspicuous involucre and involucels 

 of narrow bracts, and white flowers. (The Latin name of the 

 Water Cress, of Celtic origin.) 



1. B. er<cta (Huds.) Coville. Erect, 2-9 dm. high; leaflets 

 ;")-'.) pairs, linear to oblong or ovate, serrate to cut-toothed, often 

 laciniately lobed, sometimes crenate, 2-8 cm. long ; fruit scarcely 

 2 mm. long. (B. angustifolia Mertens & Koch ; Sium angusti- 

 folium L.) Swamps and streams, s. Ont. and Mich, to Minn., 

 827. B. erecta x 8. southw. and westw. July, Aug. Fio. 827. 



16. SIUM [Tourn.] L. WATER PARSNIP 



Calyx-teeth minute. Fruit ovate to oblong, glabrous, with prominent corky 

 nearly equal ribs ; oil-tubes 1-3 in the intervals ; stylopodium depressed ; seed- 

 face plane. Smooth perennials, with pinnate leaves and serrate 

 or pinnatifid leaflets, involucre and involucels of numerous narrow 

 bracts, and white flowers. (From <rlov, the Greek name of some 

 marsh plant.) 



1. S. cicutaefblium Schrank. Stout, 0.8-2 m. high ; leaflets 

 3-8 pairs, linear to lanceolate, sharply serrate and mostly acumi- 

 nate, 5-12 cm. long, .the lower leaves sometimes submersed and 

 finely dissected ; fruit 2.5-3 mm. long, with prominent ribs. (S. 

 lineare Michx.) Muddy banks, common. FIG. 828. S. Carsonii 

 Durand appears to be merely a weak aquatic state or perhaps 

 variety, 2-6 dm. high, with leaflets 1-3 pairs, linear, 

 2-5 cm. long ; when submersed or floating, very thin, 

 ovate to oblong, usually laciniately toothed or dissected, 

 the leaf sometimes reduced to the terminal leaflet; fruit slightly 

 smaller. 



17. CRYPTOTAENIA DC. HONEWORT 



Calyx-teeth obsolete. Fruit linear-oblong, glabrous, with obtuse 

 equal ribs ; oil-tubes solitary in the intervals and beneath each rib ; 

 stylopodium slender-conical ; seed-face plane. A glabrous peren- 

 nial, with thin 3-foliolate leaves, no involucre, involucels of minute 

 bractlets or none, and white flowers. (Name from KpvTrrbs, hidden, 

 and raivLa., a fillet, referring to the concealed oil-tubes.) 



1. C. canadensis (L.) DC. Plant 3-9 dm. high; leaflets large, 

 ovate, 5-10 cm. long, pointed, doubly serrate, often lobed ; umbels 

 irregular and unequally few-rayed ; pedicels very unequal ; fruit 

 4-6 mm. long; often curved. (Deringa Ktze.) N. B. to Ga., 

 w. to Tex. and w. Ont. June-Sept. FIG. 829. 



!8. 8. clcutae- 

 folium x 4. 



18. ZfZIA Koch. 



Calyx-teeth prominent. Fruit ovate to oblong, glabrous, with filiform ribs. 

 Oil-tubes large and solitary in the broad intervals, and a small one in each rib ; 



