306 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



3. Thlaspi glaucum A. Nelson, Bull. Torr. Clul. 25: 275. 1898. 

 ThlasTpi alpefitre glaucum A. Nelson, First Rep. Fl. Wyo. 84. 1896. 

 Type locality: La Plata Mines, Wyoming. 

 Range: Washington, Wyoming. 

 Specimens examined: Blue Mountains, Pifer 2407. 

 Zonal distribution: Canadian. 



PHYSARIA. 



1. Physaria geyeri (Hook.) A. Gray, Gen. 111. 1: 162. 1848. 



ViNicdiui (jeijrri Hook. Loncl. Journ. Bot. 6: 70. pi. 5. 1847. 



Type locality: "Sunny, sandy declivities on elevated voleanic places. Upper Spokan 

 River." Collected by Geyer. 



Range: In the vicinity of Spokane, Washington. 



Specimens examined: Spokane Valley, Lijall in 1861; upper Spokane River, G^^ye?" 476; 

 Spokane, Henderson 2384; Piper 2293; Marshall Junction, Piper 1843; Hangman Creek 

 Sandherg & Leiherg 17; Clarks Springs, Kreager 117. 



Zonal distribution: Arid Transition. 



Hooker « at first included this species in his Vesicana didijmocarpa, and this is perhaps the 

 basis for the inclusion of Physaria didymocarpa (Hook.) Gray in Suksdorf's list. 



NESLIA. 



1. Neslia paniculata (L.) Desv. Journ. Bot. 3: 162. 1814. 

 Myagrum. paniculatum L. Sp. PL 2: 641. 1753. 

 Type locality: "Habitat in Europa, juxta agros." 

 Specimens examined: Frontier, Kreager 467. 



ATHYSANUS. 



1. Athysanus pusillus (Hook.) Greene, Bull. Cal. Acad. 1: 72. 1885. 



Thysanocarpus pusillus Hook. Ic. PI. pi. 4^. 1837. 



Thysanocarpus ohlongifolius Nutt.; Torr. & Gr. Fl. 1: 118. 1838. 



Type locality: Monterey, California. Collected by Douglas. 



Range: British Columbia to Idaho and California. 



Specimens examined: Tacoma, i^/d;' 885; Rock Creek, Sandherg d: Leiherg 96; without 

 locality, Vasey in 1889; Pullman, Elmer 124; Piper 1481; 7/^///, May, 1892. 



Zonal distribution: Transition. 



THYSANOCARPUS. 



1. Thysanocarpus curvipes Hook. Fl. Bor. Am. 1: 69. 1830. 



Thysanocarpus trichocarpus Rydberg, Bull. Torr. Clul) 30: 253. 1903. 



Type locality: "On moist ground, near the Great Falls of the Columbia." Collected 

 by Douglas. 



Range: Washington and Idaho to California and Arizona. 



Specimens examined: West Klickitat County, Suhsdorf, April 30, 1886; Rock Lake, 

 Sandherg cfc Leiherg 118; Wawawai, Lalce 478; Piper 1480 in part, April, 1897; Waitsburg, 

 Horner 76 in part; without locality, Vasey 187. 



Zonal distribution: Upper Sonoran and Arid Transition. 



la. Thysanocarpus curvipes made carp us subsp. nov. 



Differs from the species in having its pods glabrous instead of puberulent. 



From field observations this seems worthy of subspecific rank. While both forms may 

 occur close together, yet so far as my observations go a particular colony of plants is of one 

 form or the other; the two do not occur mixed. 



aFl. Bot. Am. 1: 49. 1830. 



