538 



UMBELLIFERAE. 



[VOL. II. 



Mock Bishop- weed. 



i. Ptilimnium capillaceum (Michx.) Hollick. 



(Fig. 2699.) 



AmmimajusWa.lt. Fl. Car. 113. 1788. NotL. 

 A. capillaceum Michx. Fl. Bor.Am. i: 164. 1803. 

 D. capillacea DC. Mem. Omb. 38. 1829. 

 Ptilimnium capillaceum Hollick, Trans. N. V. 



Acad. 13: 20. 1893. 



Slender, i-2 high, the branches ascend- 

 ing or sometimes divaricate. Leaves finely 

 dissected into filiform segments, the upper 

 sessile, the lower more or less petioled; in- 

 volucral bracts or some of them pinnately 

 parted; involucels of several linear bracts; 

 umbels 2'-4' broad, 5-2O-rayed, the rays i'- 

 2' long; pedicels 2 / '-8 // long; fruit ovate, 

 acute, i"-i#"long. 



In wet soil, especially brackish meadows, 

 alonff the coast, Massachusetts to Florida, ex- 

 tending: west to Texas. June-Oct. Called also 

 Herb William, Wood-nep, Bole- or Bull-wort. 



2. Ptilimnium Nuttallii (DC.) Britton. 

 Nuttall ' s Mock Bishop- weed. ( Fig. 2 700. ) 



Peucedanum verticillatum Raf. Fl. Ludov. 81. 1817 ? 

 Discopleura Xuttallii DC. Mem. Omb. 38. 1829. 

 Discopleura capillacea var. Nultallii Coult & Rose, 



Bot. Gaz. 12: 392. 1887. 

 Ptilimnium Nullallii Britton, Mem. Torr. Club, 5: 



244. 1894. 



Similar to the preceding species, but generally 

 stouter, 2-3 high, the branches nearly erect. 

 "Umbels 7-25-rayed; bracts of the involucre lin- 

 ear, entire, short, those of the involucels minute; 

 fruit nearly orbicular, obtusish, about #" long. 



In swamps, Illinois to Arkansas, Louisiana and 

 Texas. May-Sept 



40. BERULA Hoffm.; Bess. Enum. PI. Volh. 44. 1821. 



A glabrous aquatic or marsh perennial, with pinnate leaves, serrate or sometimes incised 

 leaf-segments, and terminal compound umbels of white flowers. Involucre and involucels 

 of several narrow bracts. Calyx-teeth very small. Stylopodium conic; styles short Fruit 

 subglobose, slightly flattened laterally, glabrous, the ribs very slender, the pericarp thick 

 and corky; oil-tubes numerous and close together along the inner side of the pericarp. Seed- 

 face flat. [Latin name of the water cress.] 



A monotypic genus of the north temperate zone. 



i. Berula erecta (Huds.) Coville. Cut- 

 leaved Water Parsnip. (Fig. 2701.) 



Stum erectum Huds. Fl. Angl. 103. 1762. 



Sium angustifolium L. Sp. PI. Ed. 2, 1872. 1763. 



Berula angustifolia Mert. & Koch, Deutsch. Flora, 



a: 433. 1826. 

 B. erecta Coville, Contr. Nat. Herb. 4: 115. 1893. 



Erect, rather stout, much branched, 6 / ~3 high. 

 Leaflets 7-19, ovate, oval, or linear-oblong, 

 deeply serrate, laciniate, or lobed, &'-&" long, 

 2 // -5 // wide, those of the upper leaves com- 

 monly more laciniate than those of the lower; 

 umbels numerous, short-peduncled, 10-20 rayed; 

 rays^'^X' long in fruit; pedicels iX"-3" long; 

 fruit less than \" long, nearly orbicular, some- 

 what cordate at the base, the ribs inconspicuous. 



In swamps and streams, southern Ontario to 

 British Columbia, south to Massachusetts (?) Illi- 

 nois, Nebraska; in the Rocky Mountains to New 

 Mexico and to California. Also in Europe and 

 Asia. Called also Lesser or Narrow-leaved Water- 

 Parsnip. July-Sept. 



