UMBELLIFERAE. 677 



14. MUSINEON Raf. (See Appendix.) 



Low perennial resiniferous herbs, with pinnately decompound leaves, and com- 

 pound umbels of yellow or white flowers. Involucre none. Bracts of the involu- 

 cels few, narrow. Calyx-teeth ovate. Stylopodium small, depressed. Fruit 

 ovate or ovate-oblong, slightly compressed laterally. Carpels somewhat 5-angled, 

 the ribs liliform, equal; oil-tubes usually 3 in the intervals. Seed-face concave. 

 [A name of fennel.] Three known species, natires of N. Am. 



Stem leafy, branching; fruit about 4 mrn. long. x. M. divaricatum. 



Plant acaulescent, tufted; fruit about 2 mm. long. 2. M. tenuifolium. 



1. Musineon divaricatum (Pursh) Nutt. LEAFY MUSINEON. (I. F. f. 2673.) 

 Branched, glabrous, 1.5-3 dm. high. Leaves bipinnatifid, petioled, 5-15 cm. 

 long, the rachis narrowly winged, the segments oblong or ovate, acutish, 3-5 -den- 

 tate; umbels mostly long-peduncled, 2.5-6 cm. broad, 8-25-rayed; rays 6-25 mm= 

 long; flowers yellow; fruit smooth, or very nearly so. Prairies, S. Dak. to Mani- 

 toba, the N. W. Terr, and Ore. May-June. 



2. Musineon tenuifolium Nutt. SCAPOSE MUSINEON. (I. F. f. 2674.) 

 Acaulescent from a woody root, tufted, glabrous, 5-15 cm. high. Leaves decom- 

 pound into linear acute incised segments; umbel 1-2.5 cm. broad, 5~i8-rayed; 

 rays 4-10 mm. long; flowers greenish white (?); fruit oblong, nearly smooth, its 

 ribs rather prominent when dry. In dry rocky places, S. Dak., Neb. and in the 

 Rocky Mts. June -July. 



15. BUPLEURUM L. 



Annual or perennial herbs, with simple entire clasping or perfoliate leaves, and 

 compound umbels of yellow or greenish yellow flowers. Involucre none in our 

 species. Involucels of 5 ovate mucronate bracts. Calyx-teeth obsolete. Stylopo- 

 dium conic. Styles short. Fruit oblong or oval, somewhat compressed laterally. 

 Carpels angled, with slender equal ribs; oil-tubes none in our species. Seed-face 

 concave. [Greek, ox-ribbed, referring to the leaves.] About 65 species of wide 

 distribution. Besides the following another occurs in northwestern Am. 



i. Bupleurum rotundifolium L. HARE'S EAR. THOROUGH-WAX. (I. F. f. 

 2677.) Annual, rather stiff, glabrous, pale, 3-6 dm. high. Leaves broadly ovate, 

 or oval, mostly obtuse, mucronate, 2-4 cm. long, perfoliate, or the lowest narrowed 

 into a petiole; umbels 3-6-rayed, the rays seldom over 8 mm. long; bracts of the 

 involucels about as long as the rays, yellowish; fruit glabrous, about 3 mm. long. 

 In fields, N. H. to N. Car., S. Dak., Kans. and Ark. Also in the Southwest. 

 Nat. from Europe. July-Aug. 



Bupleiirum Odontltes L., with narrowly linear leaves, also European, has been 

 found in waste places in Mass. 



16. APIUM L. 



Annual or perennial glabrous herbs, with pinnate or pinnately compound 

 leaves, and white flowers in compound umbels. Calyx-teeth obsolete. Petals 

 ovate, mostly inflexed at the apex. Stylopodium depressed, or short-conic. Fruit 

 ovate, or broader than long, smooth, or tuberculate. Carpels mostly with promi- 

 nent ribs, somewhat 5 -angled; oil-tubes mostly solitary in the intervals, 2 on the 

 commissural side. Seed terete, or nearlv so. [Latin name of these or some simi- 

 lar plants.] About 15 species, of wide distribution. Besides the following, 2 or 3 

 others occur in the southern and western U. S. 



Leaf-segments broad. i. A. graveolens. 



Leaf-segments very narrow. 2. A. leptophyUum. 



i. Apium graveolens L. CELERY. (I. F. f. 2688.) Glabrous; stem 3-9 

 dm. high. Leaves pinnate; leaf-segments 3 or 5, thin, broadly ovate to oval, 

 coarsely toothed and often incised; umbels 3-7 rayed; involucre and involucels 

 small, or none; flowers small, short-pedicelled; fruit oval, scarcely I mm. long, the 

 ribs somewhat winged; oil-tubes mostly solitary in the intervals and 2 on the com- 

 missural side. In waste places, escaped from cultivation in Va. and nat. in salt 

 marshes on the coast of Cal. Native of Europe. May-July. 



