299 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
SPECIMENS EXAMINED: White Salmon, Suksdorf 487; without locality, Brandegee 1076; 
Almota, Lake & Hull 707; Piper 1507; Wawawai, Elmer 755. 
ZONAL DISTRIBUTION: Upper Sonoran. 
LORANTHACEAE. MIsTLETOE FAMILY. 
RAZOUMOFSKYA. 
Staminate flowers paniculate, nearly all terminal on distinct 
peduncle-like joints ...........-.---.-----.-2------------ 1. R. americana. 
Staminate flowers forming simple or compound spikes. 
Stems stout, 5 to 12 cm. high. ...-.- 2.2.2.2 2-2. 2.----- 2. R. campylopoda. 
Stems short, 1 to 4.em. high .......................... 3. R. douglasii. 
On Tsuga heterophylla......-.......-.-.-2--------- 3a, R. douglasii tsugensis. 
On Larix oceidentalis .........-.-.-----2-2-22----- 3b. R. douglasii laricis. 
On Abies grandis. ........-.-.-...-.-.-----.-.-..- 3c. R. douglasii abietina. 
1. Razoumofskya americana (Nutt.) Kuntze, Rev. Gen. Pl. 2: 587. 1891. 
Arceuthobium americanum Nutt.; Engelm. Bost. Journ. Nat. Hist. 6: 214. 1850. 
TypE Loca.ity: Oregon. Collected by Nuttall. 
Rance: British Columbia and Saskatchewan to California and Colorado. 
SPECIMENS EXAMINED: Big Klickitat River, Henderson 2539, 2538; Falcon Valley, Suks- 
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. Bost. Journ. Nat. Hist. 6: 214. 1850. 
Arceuthobium occidentale Engelm. in S. Wats. Bot. Cal. 2: 107. 1880. 
Type Locauiry: “Oregon, on Pinus ponderosa.”’ Collected by Geyer. The specimens 
are from north Idaho or northeast Washington, as Geyer did not collect in Oregon proper. 
Rance: British Columbia to California and Idaho. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 1364, 672; Peshastin, Sand- 
berg & Leiberg 593; Spokane, Piper, July 18, 1895; Sandberg, McDougal, & Heller 925; 
Spokane Valley, Watson; Railroad Creek, Hlmer, September, 1897; Medical Lake, Elmer 
1246. 
ZONAL DISTRIBUTION: Arid Transition. 
Jommon 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. 
38. Razoumofskya douglasii (Engelm.) Kuntze, Rev. Gen. Pl. 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. IT]. 2: 272. 1903. 
TypE Loca.ity: ‘‘ West coast of Vancouver island.” 
RanGE: British Columbia and Washington. 
SPECIMENS EXAMINED: Port Ludlow, Binns; Seattle, Piper 663; Nisqually Valley, Allen 
303. 
ZONAL DISTRIBUTION: Humid Transition. 
Locally abundant on T'suga heterophylla, causing large “‘ witches-brooms. ”’ 
