222 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: White Salmon, Suksdorf ^J; without loc&liij , Braniegee 1076; 

 Almota, Lake tfc Hvll 707; Piper 1507; Wawawai, Elmer 755. 

 Zonal distribution: Upper Sonoran. 



LORANTHACEAE. Mistletoe Family. 



RAZOUMOFSKYA. 



Starninate flowers paniculate, nearly all terminal on distinct 



peduncle-like joints 1. R. omericana. 



Starninate flowers fonning simple or compound spikes. 



Stems stout, 5 to 12 cm. high 2. JR. canipyhpoda. 



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



On Tsuga heterophyUa 3a. iJ. douglasii tsugensis. 



On Larix occidentalis 3b. R. douglasii laricis. 



On Abies grandis 3c. R. douglasii abietina. 



1. Razoiunofskya americana (Nutt.) Kuntze, Rev. Gen. PI. 2: 587. 1891. 

 Arceuihobium americanum Nutt.; Engelm. Bost. Journ. Nat. Hist. 6: 214. 1850. 

 Type locauty: Oregon. Collected by Nuttall. 



Ranoe: British Columbia and Sa.skatchewan to California and Colorado. 

 Specimens examined: Big Klickitat River, //en(/cr«on 2539, 2538; Falcon Valley, Suifca^ 

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

 Zonal distribution: Canadian. 

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



2. Razoumofskya campylopoda (Engelm.). 



Arceuthobium campylopodum Engelm. Ikxst. Journ. Nat. Hist. 6: 214. 1850. 



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



Type ix)Cality: "Oregon, on Pinus ponderosa." Collected by Gcycr. The specimens 

 are from north Idaho or northeast Washington, a.s Geyer did not collect in Oregon proper. 



Ranue: British Columbia to California and Idaho. 



Specimens examined: West Klickitat County, Suksdorf 1364, 672; Peshastin, Sand- 

 berg <fc Leiberg 593; Spokane, Piper, July 18, 1895; Sandberg, McDougal, cfe Heller 925; 

 Spokane Valley, ITateon; Railroad Creek, £'Zm«r, September, 1897; Medical h&ke, Elmer 

 1246. 



Zonal distribution: Arid Transition. 



Common on Pinus ponderosa, often forming largo clusters. The starninate plants are 

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

 owing to the explosive fruits. 



3. Razoiuuofskya douglasii (Engelm.) Kuntze, Rev. Gen. PI. 2: 587. 1891. 

 Arceuthobium douglasii Engelm. in Rothr. Bot. Wheeler Surv. 253. 1878. 



The typical form of this species occurs on Pseudotsuga 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. Til. 2 : 272. 1903. 



Type locality: "West coast of Vancouver island." 



Range: British Columbia and Washington. 



Specimens examined: Port Ludlow, 5inns; Seattle, Piper 663; Nisqually Valley, ^Hen 

 303. 



Zonal distribution: Humid Transition. 



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



