Carrot Family 287 



15. BERTJLA Hoffm. 



Smooth aquatic perennial herbs with simple pinnate 

 leaves, variously cut leaflets, and small white flowers. 

 Calyx-teeth minute. Fruit flattened laterally, nearly 

 round, emarginate at base, glabrous. Carpel nearly glo- 

 bose, with very slender inconspicuous ribs, thick corky 

 pericarp and no strengthening cells. Stylopodium 

 conic. Oil-tubes numerous and contiguous, closely sur- 

 rounding the seed-cavity. Seed terete. 



1. B. erecta (Huds.) Coville. Erect, 1.5-9 dm. high;' leaflets 

 5-9 pairs, linear to oblong or ovate; serrate to cut-toothed, often 

 laciniate-lobed, sometimes crenate, 1-7.5 cm. long ; umbels many- 

 rayed; rays 5 cm. long or less ; bracts usually conspicuous; bract- 

 lets narrow; pedicels 4-6 mm. long; fruit scarcely 2 mm. long. 



Occasional along watercourses. 



16. OENANTHE L. 



Mostly aquatic glabrous herbs with succulent stems, 

 pinnate or decompound leaves, and usually involucrate 

 umbels of white flowers. Calyx-teeth rather prominent. 

 Fruit globose, slightly flattened laterally if at all, gla- 

 brous. Carpel semiterete in section, with broad obtuse 

 corky ribs ; laterals the largest ; a band of strengthen- 

 ing cells investing the seeds and oil-tubes. Stylopodium 

 very short-conic, with elongated styles. Oil-tubes soli- 

 tary in the intervals, 2 on the commissural side. Seed 

 sulcate beneath each oil-tube. 



1. O. sarmentosa Californica (Wats.) C. & R. Succulent stems, 

 6-15 dm. high ; leaves ternate and biternate ; leaflets approximate, 

 acute or acutish, toothed, often lobed at base, 1-2.5 cm. long; 

 umbels many; bracts few, linear or none; bractlets similar, 

 more numerous; rays 2.5 cm. long or less; pedicels numerous, 

 short; fruit about 4 mm. long, with commissural face as well as 

 ribs very corky. 



Frequent along slow-running streams. 



