Vot. II.J CARROT FAMILY. 
1. Apiastrum patens (Nutt.) Coult. & Rose. 
Spreading Apiastrum. (Fig. 2672.) 
Lepltocaulis patens Nutt.; DC. Prodr. 4: 107. 1830. 
Apium patens S. Wats. Bibl. Index, 1: 413. 1878. 
Apiasirum patens Coult. & Rose, Rev. 110. 1888. 
Erect, slender, 1°-2° high, divergently branched above. 
Stem-leaves short-petioled, biternately dissected into 
narrowly linear or filiform segments; umbels terminal, or 
axillary, %’-114’ broad; rays 3/’-6’’ long; pedicels 14//— 
2’ long in fruit; fruit ovate, slightly more than 14’ long, 
more or less tuberculate, usually densely so. 
Nebraska and Missouri to Texas and New Mexico. June. 
24. MUSINEON Raf. Journ. Phys. 91:71. 1820. 
[AporIuM Raf. Neog. 3. 1825.] 
[MusEnNrivuM Nutt.; T. & G. Fl. N. A. 1: 642. 1840.] 
Low perennial resiniferous herbs, branching or acaulescent, with pinnately decompound 
leaves, and compound umbels of yellow or white flowers. Inyolucre none. Bracts of the 
involucels few, narrow. Calyx-teeth ovate. Petals clawed, the apex long and infolded. 
Stylopodium small, depressed. Fruit ovate or ovate-oblong, slightly compressed laterally, 
smooth or nearly so in our species (roughened in J/. trachyspermum.) Carpels somewhat 
5-angled, the ribs filiform, equal; oil-tubes usually 3 in the intervals, the middle one 
usually largest. Seed-face concave. [A name of fennel. ] 
Three known species, natives of northwestern and central North America. 
Stem leafy, branching; fruit about 2’ long. 1. A. divaricatum, 
Plant acaulescent, tufted; fruit about 1’’ long. 2. A. lenutfolium. 
1. Musineon divaricatum (Pursh) Nutt. 
Leafy Musineon. (Fig. 2673.) 
Seseli divaricatum Pursh, Fl. Amer. Sept. 732. 1814. 
Musenium divaricatum Nutt.; T. & G. Fl. N. A. 1: 
642. 1840. 
Adorium divaricatum Rydberg, Bot. Surv. Neb. 3: 
37. 1894. 
Decumbent or ascending, branched, glabrous, 6/— 
12’ high. Leaves bipinnatifid, petioled, 2’-6’ long, 
the rachis narrowly winged, the segments oblong 
or ovate, acutish, 3-5-dentate; umbels mostly long- 
peduncled, 1/-2%’ broad, 8-25-rayed; rays rather 
stout, 3’’-12’’ long; pedicels about 114’ long in 
fruit; flowers yellow; fruit smooth, or very nearly 
so, about 2’ long. 
Prairies, Manitoba and the Upper Missouri region to 
the Northwest Territory and Oregon. May-June. 
> fr vs 
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7 
2. Musineon tenuifolium Nutt. Scapose 
Musineon. (Fig. 2674.) 
Musenium tenutfolium Nutt.; T. & G. Fl. N. A. 1: 642. 1840. 
Adorium tenuifolium Kuntze, Rev. Gen. Pl. 264. 1891. 
Acaulescent from a woody root, tufted, glabrous, 2/-6/ 
high, pale and somewhat glaucous. Leaves petioled, de- 
compound into linear acute incised segments; esc apequla- 
ling or slightly exceeding the leaves; umbel 14/-1’ broad, 
5-18-rayed; rays 2/’-5’’ long; flowers greenish white (?); 
pedicels 14’/-2’ long in fruit; fruit oblong, nearly smooth, 
about 1’” long and 4’ thick, its ribs rather prominent when 
dry. 
In dry rocky places, Nebraska, and in the Rocky Mountains. 
June-July. 
