. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 644 AMMIACEAE. Vol. II. Musineon Hookeri (Nutt.) T. & G. differs in being scabrous. It inhabits the Rocky Mountain region, ranging eastward into South Dakota and western t^\ 2. Musineon tenuifolium Nutt. Scapose Musineon. !'U -' Fig. 3144. Musenium tenuifolium Nutt.; T. & G. Fl. N. A. i: 642. 1840. Adorium tenuifolium Kuntze, Rev. Gen. PI. 26
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 644 AMMIACEAE. Vol. II. Musineon Hookeri (Nutt.) T. & G. differs in being scabrous. It inhabits the Rocky Mountain region, ranging eastward into South Dakota and western t^\ 2. Musineon tenuifolium Nutt. Scapose Musineon. !'U -' Fig. 3144. Musenium tenuifolium Nutt.; T. & G. Fl. N. A. i: 642. 1840. Adorium tenuifolium Kuntze, Rev. Gen. PI. 264. 1891. Acaulescent from a woody root, tufted, glabrous, 2'-6' hiigh, pale and somewhat glaucous. Leaves petioled, decom- pound into linear acute incised segments; scape equalling or slightly exceeding the leaves; umbel i'-i' broad, 5-18-rayed; rays 2"-s" long; flowers greenish white (?); pedicels J"-2" long in fruit; fruit oblong, nearly smooth, about i" long and i" thick, its ribs rather prominent when dry. In dry rocky places, South Dakota, Nebraska, and in the Rocky Mountains. June-July. 29. CYMOPTERUS Raf. Journ. Phys. 89: 100. 1819. Perennial subscapose glabrous herbs, with thick roots', pinnately decompound leaves, and white flowers (in our species) in peduncled umbels. Involucre of several bracts or none. Involucels of 1 to numerous bracts. Calyx-teeth rather prominent. Petals inflexed at the apex. Stylopodium depressed. Fruit globose, ovoid or ellipsoid, flattened laterally or not at all. Carpels dorsally flattened, with 3-5 flat equal wings; oil-tubes several or solitary in the intervals, few or several on the commissural side. [Greek, wave-winged, referring to the fruit.] About 13 species, natives of western and central North America, the following typical. Plains Cymopterus I. Cymopterus acaiilis (Pursh) Rydberg. Selinum acaule Pursh, Fl. Am. Sept. 732. 1814. Cymopterus glomeratus Raf. Journ. Phys. 8g : 100. 1819. Cymopterus acaulis Ry
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