244 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



2. Monolepis nuttalliana (Room. & Schult.) Greene, Fl. Fran. 168. 1891. 



Bliium chenopodioides Nutt. Gen. 1: 4. 1818, not Lam. 



Blitum nuttallianum Room. & Schult. Mant. 1 : 65. 1822. 



Monolepis chenopodioides Moq. in DC. Prod. 13': 85. 1849. 



Type locality: "On arid soils near the banks of the Missouri." 



Range: Washington to Saskatchewan, southward to California and New Mexico. 



Specimens examined: Ellensburg, Piper, May 20, 1897; Ritzville, Sandberg d; Leiberg 

 165; Pullman, Piper 1844; Waitsburg, Homer 186. 



Zonal distkibittion: Upper Sonoran and Arid Transition. 



AMARANTHACEAE. Amaranth Family. 



AMARANTHUS. 

 Flowers in dense terminal spikes. 



Spikes green, stout, 8 to 14 mm. thick 1. A. retroflexus. 



Spikes purple, slender, 4 to 6 nun. thick 2. A. paniculatus. 



Flowers in small axillary clusters. 



Plants prostrate ; sepals 4 or 5 3. A. blitoides. 



Plants erect, much branched ; sepals 3 i. A. graecizans. 



1. Amaranthiis retroflexus L. Sp. PI. 2: 991. 1753. Pigweed. 

 Type ixjcalitt: "Habitat in Pennsylvania." 



Range: Temperate and subtropical North America, mainly spread as a weed. 

 Specimens examined: Pullman, Piper 1554. 



2. Amaranthus paniculatus L. Sp. PI. ed. 2. 2: 1406. 1763. 

 T^PE LfK-ALiTk': "Habitat in America." 



Ratjge: Naturalized in the United States from subtropical regions. 

 Specimens examined: Clarks Springs, Kreager 569. According to Hooker collected 

 in 1825 by Scculer on the Columbia. 



3. Amaranthus blitoides S. Wats. Proc. Am. Acad. 12: 273. 1877. 



Type LOCALnr: "Frequent in the valleys and plains of the interior, from Mexico to N. 

 Nevada and Iowa, and becoming introduced in some of the Northern States eastward." 

 Range: Washington to Nevada, Colorado, and Mexico. Now spreading eastward. 

 Specimens examined: Pullman, Piper 1552; Spokane, Kreager 581. 

 Zonal distribution: Arid Transition. 



4. Amaranthus graecizans L. Sp. PI. 2: 990. 1753. Tumbleweed. 

 Amaranthus albus L. Syst. ed. 10. 1268. 1760. 



Type locality: "Habitat in Virginia." 



Range: Spread as a weed throughout temperate and subtropical North America. 

 Specimens examined: West Klickitat County, Suksdorf 2079; Pasco, Henderson in 

 1892; Pullman, Piper 15.53; Wawawai, Piper, July 31, 1893. 



NYCTAGINACEAE. Four-()'clo(;k Family. 



ABRONIA. 



Plants of the seashore. 



Flowers rose-colored; wings#f the fruit thin 1. ^. umbellata. 



Flowers yellow; wings of the fruit thick, hollow 2. A. latifolia. 



Plant of the sage-plains ; flowers white 3. ^. mellifera. 



1. Abronia umbellata Lam. 111. 1 : 469. pi. 105. 1791. 



Type locality: " Ex Califomiae maritimis. " 



Range: Seacoast, Washington to California. 



Specimens examined: Port Angeles, Piper 2301; Clallam County, Elmer 2790; Point- 

 no-point, Piper in 1890. 



Zonal distribution : Humid Transition. 



