91 
The Apogon Section 
Washington. Spokane Co., 1884, Suksdorf (K). 
Kittitas Co., Ellensburg, 1897, Whited (W). 
Whitman Co., Pulman, 1897, Elmer (B). 
Falcon Valley, 1881, Suksdorf (BM). 
Montana. Bridger Mts, 1897, Rydberg and Bessey (K) (B) (E). 
Forks of the Madison River, 1897, Rydberg and Bessey (K) (B) (E). 
Idaho. Big Potlatch River, 1892, Sandberg (BM) (K) (B) (E). 
Oregon. Little Indian Creek, 1897, Sheldon (no. 8931) (W). 
Klamath Co., Johnson Prairie, 1898, Applegate (no. 2445) (W). 
Klamath Indian Reservation, 1902, Walpole (no. 2213) (W). 
Nevada. Austin, 1882, Jones (BM) (B). 
Washoe Co., 1902, Baker (B) (V). 
Pine Forest Mts, 1901, Griffiths and Morris (W). 
California. Mono Co., White Mts, Black Carton, 1891, Coville and Funston (B). 
Bishop, Owen River Valley, 1897, Jones (BM). 
Inyo Co., 1906, Heller (E). 
Inyo Mts, 1891, Coville and Funston (K). 
Modoc Co., Goose Lake Valley, 1894, Austin (BM). 
Bear Valley, San Bernardino Mts, 1905, Davidson (W). 
[N.B. On the Laguna Mts 1 , San Diego Co., there appears to grow a special form of 
this Iris in which the stems are scarcely taller than the leaves. The number of flowers 
in the spathe and the long pedicels in the fruiting specimens seem to prove that we 
must name them I. ntissouriensis and not I. montana, though at first sight they appear 
to resemble the latter closely.] 
San Diego Co., Laguna Mts 1 , 1889, Orcutt (W). 
1894, Schoenefeldt (W). 
Utah. Coyote, 1894, Jones (BM). 
Glenwood, 1875, Ward (W). 
Arizona. Southern Apache Co., 1904, Hough (W). 
Willow Spring, 1890, Palmer (K). 
Johnson’s Ranch, 1884, Lemmon (BM). 
West side of San Francisco Mt, 1901, Ward (K). 
Barfoot Park, Chiricahui Mts, 1906, Blumer (K) (B) (E). 
Flagstaff, 1898, MacDougal (E). 
Colorado. Mancos, 1898, Baker, Earle and Tracy (K) (BM) (E) (V). 
New Mexico. Sawyer’s Peak, Grant Co., 1904, Metcalfe (BM) (E) (B). 
Mexico. Lerios, E. of Saltillo, 10,000 ft, 1880, Palmer (K) (B). 
Diagnosis. 
I. ntissouriensis I. longipetalae proxima sed caulis folia longe superat ; ante hiemem initam pereunt 
folia, vere solum recrescunt nova. 
This Iris, which sometimes occurs in gardens under the name of I. longipetala montana (see 
Lynch l.c.), scarcely needs a separate description. It differs only in being more slender in all its 
parts, in holding its flowers well above the leaves, and in losing its leaves entirely in late autumn. 
Its colour, the shape of its capsule, and the seeds are identical with those of /. longipetala. In both 
cases the perianth tube is short, of a pale yellow-green, and not perceptibly constricted above the ovary. 
Observations. See the introduction to the group. 
t + /. MONTANA 1 
(Plate XXII) 
Nuttall MS. on specimen in the British Museum. 
[Reasons for retaining the name tnontana will be found in the introduction to the longipetala group.] 
Synonym. 
I. pelogonus, Goodding in Coult. Bot. Gaz. XXXIII. p. 68 (1902). 
[The identification is probable but not quite certain. The name was given in allusion to the statement 
that this Iris is only found growing on Wasatch Tertiary clays. This statement I have been 
unable either to verify or disprove owing to the inaccessibility or absence of reliable geological 
maps of the districts concerned.] 
Distribution. The States of Montana, Dakota, Wyoming, Colorado, Arizona, California. 
Montana. Bozeman, 1905, Blankinship (BM) (E). 
Dakota. Black Hills, 1887, Forwood (K) (W). 
Wyoming. Wind River, 1882, Forwood (B). 
Sweetwater Co., Bush Ranch, 19CX), Aven Nelson (K) (B). 
[N.B. This is the type of I. pelogonus (v. supra).] 
Laramie, 1909, Aven Nelson (HortD). 
Albany Co., Sand Creek, 1900, Aven Nelson (B) (K). 
Centennial Valley, 1895, Nelson (E). 
1 Laguna Mts is probably a misreading of Cuyamaca Mts, which are in San Diego County. No Laguna Mts are known 
there and Mr S. B. Parish tells me that the plant grows in the Cuyamaca Mts. 
J I am indebted for the plant from which the plate was drawn to Prof. Aven Nelson, who collected it near Laramie, Wyoming. 
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