_:_:::: contributions from the national herbarium. 



Specimens examined: White Salmon, Suhsdorf 487; without \o{^al\t\, Brandegee 1076; 

 Almota, Lake c& Hull 707; Piper 1.507; Wawawai, Elmer 755. 

 Zonal distribution: Upper Sonoran. 



LORANTHACEAE. Mistletoe Family. 

 RAZOUMOFSKYA. 



Staminate flowers paniculate, nearly all terminal on distinct 



peduncle-like joints 1. R. arnericana. 



Staminate flowers forming simple or compound spikes. 



Stems stout, 5 to 12 cm. high 2. U. campylojmhi. 



Stems short, 1 to 4 cm. high 3. R. douglanil. 



On Tsuga heterophylla 3a. R. douglas'd tm/geiisis. 



On Larix occidentalis 31). R. douglasii laricix. 



On Abies graiidis 3c. R. douglasii abietina. 



1. Razoumofskya arnericana (Nutt.) Kuntze, Rev. Gen. PI. 2: .587. 1891. 

 Arceuthobium americanum Nutt.; Engelm. Bost Jouru. Xat. Hist. 6: 214. 18.50. 

 Type locality: Oregon. Collected hy Nuttall. 



Range: British Columbia and Saskatchewan to California and Colorado. 

 Speclmens examined: Big Klickitat River, i?<?7trf(?rson 2.539, 2.538; Falcon Valley, SuA-s- 

 dorf 211; near Ellensburg, Brandegee 1069; Spokane Valley, Lyall in 1861. 

 Zonal distribution: Canadian. 

 Common on Piniis contorta, but apparently only east of the Cascade Mountains. 



2. Razoumofskya campylopoda (Engelm.). 



Arceuthobium campijlopodum Engelm. Bost. Jourii. Xat. Hist. 6: 214. 18.50. 



Arceuthobium occidentale Engelm. in S. Wats. Bot. Cal. 2: 107. 1880. 



Type locality: "Oregon, on Pinus ponderom.'' Collected by Geyer. The specimens 

 are from north Idaho or northeast Washington, as Geyer did not collect in Oregon projjer. 



Range: British Columbia to California and Idaho. 



Specimens examined: West Klickitat County, Suksdorf 1.3f)4, 672; Peshastin, Siind- 

 berg cfc Leiberg .593; Spokane, Piper, July 18, 1895; Samlberg, McDougal, cfc Heller 925; 

 Spokane Valley, IFateori; Railroad Creek, £77ne/-, September, 1897; Medical Lake, £7mer 

 1246. 



Zonal distribution: Arid Transition. 



Common on Pinus ponderosa, often forming large clusters. The staminate plants are 

 yellow, the pistillate olivaceous. It is locally more or less well known as "snappers," 

 owing to the explosive fruits. 



3. Razoumofskya douglasii (Engelm.) Kuntze, Rev. Geii. PI. 2: .587. 1891. 

 Arceuthobium douglasii Engelm. in Rothr. Bot. Whe(4er Surv. 2.53. 1878. 



The typical form of this species occurs on Pseudolmga mucronata. This occurs from 

 Idaho to Arizona and New Mexico. Doubtless it will be found in Washington also. The 

 forms on Tsuga, Larix, and Abies are apparently distinct, at least in their host relations, 

 but satisfactory morphological characters to separate them have not been detected. They 

 may conveniently be considered as subspecies. 



3a. Razoumofskya douglasii tsugensis (Rosendahl). 



Razoumofskya tsugensis Rosendahl, Minn. Bot. Stud. III. 2: 272. 1903. 



Type locality: "West coast of Vancouver island.'' 



Range: British Columbia and Washington. 



Specimens examined: Port Ludlow, Bin ns; Seattle, Pipe/- 663; Nisqually XaUey, Allen 

 303. 



Zonal distribution: Humid Transition. 



Locally abundant on Tsuga heterophylla, causing large "witches-brooms." 



