PIPER FLORA OF THE STATE OF WASHINGTON. 395 



16. Viola adunca Smith; Rees' Cycl. 37: no. 63. 1817. 

 Viola longipes Nutt.; Torr. & Gr. Fl. 1: 140. 1838. 



Viola canina adunca A. Gray; Proc. Am. Acad. 8:377. 1872. 



Type locality: "From the west coast of North America." Collected by Menzies. 



Range: Alaska to California and Arizona. 



Specimens examined: Clallam County, Elmer 2795; Orcas Island, Lyall 1861; Muckle- 

 shoot. Dr. Ruhn; Seattle, Smith, May 3, 1889; Mount Rainier, Piper 2138 in part; Monte- 

 sano, Heller 3928; Westport, Lamb 1102; Rockland, Suksdorf, April 10, 1858; Klickitat 

 River, Flett 1061; Falcon Valley, Suksdorf 522; Roy, Allen, May 3, 1889; White Bluff 

 Ferry, Lake & Hull, August 10, 1892; Yakima, Leckenby, April 22. 1898; Mrs. Steinweg; 

 Ellensburg, Whited 274, 346, 366; Badger Mountain, Whited 1217; Fort Colville, Lyall 1861 ; 

 Spangle, Suksdorf 246; without locality, Vasey 202; Rock Creek, Piper 2795; Spokane, 

 Piper, May 8, 1898, 2824; Sandberg <& Leiberg 33; Pullman, Piper 1714, Elmer 123, Hull 417; 

 Waitsburg, Horner 55, 54. 



Zonal distribution: Upper Sonoran to Hudsonian. 



A very variable species. The alpine forms especially are aberrant and perhaps consti- 

 tute a different species. 



16a. Viola adunca oxyceras (S. Wats.) 

 Viola canina oxyceras S. Wats, in Brewer & Wats. Bot. Cal. 1: 56. 1876. 

 Type locality: "In the Sierra Nevada, in Yosemite Valley, and near Donner Pass." 

 Range: Washington to California. 

 Specimens examined: North Yakima, Henderson 2501. 



17. Viola retroscabra Greene, Pittonia 4: 290. 1901. 

 Type locality : Southern Colorado. 



Range: Washington and Montana to Colorado. 



Specimens examined: Olympic Mountains, Piper, August, 1895; Mount Rainier, Piper 

 2138 in part; Allen, July, 1892; Methow River, Whited 185; Klickitat River, Suksdorf 523; 

 Stevens Pass, Sandberg & Leiberg 739. 



Zonal distribution: Hudsonian. 



Viola tricolor L., the garden pansy occasionally occurs as an escape. 



Viola hallii Gray, listed by Suksdorf, probably does not grow within our limits. 



LOASACEAE. Loasa Family. 



MENTZELIA. 



Biennials; flowers large; placentae with 2 rows of ovules, which are separated by horizontal 

 lamellae. 



Petals 2.5 to 3 cm. long; capsule 1.5 cm. long \. M. hrandegei. 



Petals 5 to 6 cm. long; capsules 3 cm. long 2. M. laevicaulis. 



Annuals; flowers small; placentae each with a single row of ovules; no 

 horizontal lamellae. 



Leaves pinnatifid; seeds tuberculate, the angles obtuse 3. M. albicaulis. 



Leaves not pinnatifid; seeds not tuberculate. 



Seeds nearly smooth with grooved angles; leaves ovate, entire 



or sinuate-dentate ■. A. M . integrifolia. 



Seeds sharply angled and pitted; leaves linear, entire 5. if. tenerrima. 



1. Mentzelia brandegei S. Wats. Proc. Am. Acad. 20: 367. 1885. 



Type locality: "Near the Simcoe Mountains on the mesa bordering Satus Creek." 

 Washington. Collected by Brandegee. 



Range: Known only by the type collection. 



Specimens examined: Without locality, Brandegee 792. 



