l88 
IOWA ACADEMY OF SCIENCES 
Specimens in the writer’s herbarium were collected in Muscatine, 
Jefferson and Decatur counties. The species has been reported from 
Scott county by Barnes, Reppert and Miller. Apparently in Iowa the 
species is limited to the southeastern and southern portions. It is 
rather infrequent but wherever it occurs there may be a considerable 
colony as was noted in the case of the station in Decatur county where 
it was collected May 23, 1898. 
Parry, C. C. Owen's Peport of the Geological Survey of Wisconsin, Iowa and 
Minnesota, p. G19, 1852. 
Arthur, J. C. Contributions to the Flora of Iowa, p. 32, 1876. 
Nagel, J. J. and Haupt, J. G. Proceedings of the Davenport Academy of 
Natural Sciences, Vol. 1, p. 164, 1876. 
Painmel, L. H. Proceedings of the Iowa Academy of Sciences, 1890 — 1891, 
Vol. I, part 2, p. 90, 1892. 
Barnes, W. D. ; Reppert. Fred ; and Miller, A. A. Proceedings of the Daven- 
port Academy of Sciences, Vol. 8, p. 261, 1900. 
Fitzpatrick, T. J. The Iowa Naturalist, Vol. 1, No. 1, p. 24, January, 1905. 
Anderson, J. P. I’roceedings of the Iowa Academy of Sciences, 1904, Vol. 
12, p. 135, 1905. 
6. YUCCA L. Sp. PI. 319. 1753. 
Represented in our area by a rather large plant, with a short sub- 
terranean caudex, narrow leaves, and large bracted nodding white flow- 
ers arranged in a terminal raceme or panicle. Perianth-segments 6, sep- 
arate or slightly united. Stamens hypogynous, included; filaments thick- 
ened above, sometimes papillose; anthers small, versatile. Ovary ses- 
sile, 3-celled or imperfectly 6-celled; ovules many; style short, with 3 
stigmatic lobes. 
1. Y^ucca glauca Nutt. Fraser's Catalogue. 1813. Bear-grass. 
Yucca anguslifolia Pursh. FI. Am. Sept. 227. 1814. 
Leaves basal, linear, 1 — 3 feet long, 2 — 5 lines wide, stiff, margins 
with long thread-like fibers, sharp pointed, expanding at the base; scape 
1 — 3 feet long; flowers campanulate, 2 — 3 inches broad in a raceme or a 
little-branched panicle which may be 1 — 4 feet long; pedicels in fruit 
about one inch long, thick, erect, bracted; perianth-segments ovate, 1 — 2 
inches long; style and stigmas short; capsule oblong, 1 — 2 inches long, 
about one inch thick, 6-sided, constricted in the middle; seeds many, 
flat, about one-half inch broad. Type locality: “On the banks of the 
Missouri.” 
This species occurs in western Iowa and ranges northward to South 
Dakota, southward to Missouri and Texas, westward to Wyoming and 
Arizona. The flowers appear in May and June and the fruits develop in 
July. In Iowa the species is frequent or even common on the bare slopes 
of the Loess hills bordering the valley of the Missouri river. The writer 
collected the species in Fremont county, Iowa, in fruit, July 29, 1898. 
Professor Pammel reported the species from Pottawattamie, Harrison, 
Woodbury and Monona counties. 
Arthur, J. C. Contributions to the Fiora of Iowa, pp. 32, 43, 1876. 
Burgess, II. Bulletin of the Torrey Botanical Club, Vol. 6, . Nos. 19 and 20, 
p. 102, July and August, 1876. 
Hitchcock, A. S. Botanical Gazette, Vol. 14, No. 5, p. 128, May, 1889. 
