Deweva. UMBELLIFER^.. C41 



llie ovary, rcflexed. Fruit oval, moderately contraetetl at the sides. Carpels 

 with 5 aciuely carinate equidistant ribs. Vitl;e 3-5 in the intervals, 4-8 in 

 the comniissiire. Transverse section of the seed deeply reniforni, with a 

 central projection. Carpophore 2-partcd. — A tall perennial iierb. Leaves 

 biternately dissected. Involucre none. Involucel few-leaved, lateral. 

 Flowers white. 



Allied to Eulophus and Physospermum, but differs in tho carinatcly ribbed 

 fruit, as well as in other cliaractcrs : tlio pericarp, as in those genera, separates 

 from the seed at the commissure, leaving a wide cavity. 



-"-^C apiifolium (Nutt. ! niss.) 



a. stem leafy ; segments of the leaves incisely serrate or toothed towfirds 

 the apex. — C. apiifolium, jSuU. ! mss. 



(i. stem nearly naked above ; segments of the leaves entire or lobcd. — 

 C. nudicaule, Nutt. ! mss. 



Plains of Oregon, near the confluence of tiie Wahlamet, Nuffall ! June- 

 July. — Stem 3-4 feet high, terete, braneiiing only towards the summit. Um- 

 bels 3-4, on long peduncles. Cauline leaves with tiie petiole ternately 

 divided to the short dilated slieath : secondary divisions pinnatifid ; the seg- 

 ments three-fourths to li inch long and half an inch or more in breadth ; the 

 serratures large and imicronate. Rays of the umbel 15-24, long and slender. 

 Fruit about 2i lines long, dark brown : ribs wide at the base, but strongly 

 keeled. Seed broadly and rather deeply grooved, with a longitudinal 

 projection or blunt ridge down the middle of tlic face, so that it is only im- 

 perfectly campylospermous. 



46. DEWEYA. 



Calyx-teeth 5, subulate, persistent. Petals obovate and obcordate, with a 

 long inflexed point. Styles long and slender. Stylopodium depressed. 

 Fruit oblong-elliptical, laterally compressed, glabrous, with 5 primary ele- 

 vated and somewhat winged ribs; the lateral ones marginal. Intervals with 

 3 vitta;. Commissure with 4 vitta;. Seed free ; the transverse section semi- 

 lunar.— A perennial glabrous herb. Leaves all radical, simply pinnately 

 divided; the segments broadly ovate and cordate, acutely and numerously 

 toothed. Umbel with many rays. Involucre none. Involucel 4-5-leaved ; 

 the leaflets lanceolate, entire, or Avith 2-3 cuspidate teeth. Flowers pale 

 yellow.— Taste of the fruit similar to that of Ligusticum Scoticum. 



We dedicate this genus to our highly valued friend Professor C. Dewey, author 

 of an excellent monograph of Nortli American Carices, and of numerous memous 

 on various branches of natural science. 



D. arguta. — Ligusticum argutum, Nutt. ! mss. 



Woods of St. Diego, California, Nultall! April.—" Root large, tuberous 

 and somewhat fusiform." Leaves including the petioles, 6-8 inches long ; 

 the segments an inch or more in length, and nearly orbicular, of a tirm tex- 

 ture ; "the lowest pair distinctly peliolulafe ; terminal one often 3-lobed : all 

 sharply dentate completely round with numerous mucronate spreadmg 

 teeth. Peduncle \-\h foot long, sometimes bearing two umbels, terete, stout. 

 Rays of the umbel erect in fruit, 2-3 inches long ; of the umbellets 1-2 hues 

 long, crowded. Fruit neatly oiie-tliiid of an inch in length, moderately com- 



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