Il8 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



clusters and almost without bristles. On wooded creek-banks at an 

 altitude of 1500 m. 



Montana: Castle, Aug. i, 1896, Flodinan, ^yo. 



Urtica Breweri Wats. Proc. Am. Acad. 10: 348 [Bot. Cal. 2 : 64 ; 

 Man. R. M. 330]. 

 Montana: Bald Mountain, 1880, Watson {j). 



Parietaria Pennsylvanica Muhl. ; Willd. Sp. PI. 4: 955 [Man. R. 



M. 331; 111. Fl. i: 534; Bot. Cal. 2: 65]. 



Hillsides, in alluvial soil, etc., up to an altitude of 2000 m. 



Montana: Pony, July 6, 1897, Rydberg tf- Besscy, jgjy; 

 Helena, 1889, Kehey. 



Humulus Lupulus L. Sp. PI. 1028 [Man. R. M. 331: 111. Fl. i: 



530]- 



Along streams, in the eastern part of the state, up to an altitude of 

 1200 m. 



Montana: Glendive, 1892, Mrs. H. Miller: Miles City, 1886, 

 P. Koch, log^; Smith River, 1883, Scribuer, 2j2 ; McDonald's 

 Creek, 1882, Canby. 



LORANTHACEAE. 



Razoumofskya Americana (Xutt.) Kunze, Rev. Gen. PI. 587 ; Ar- 



cetithobium Ainericatium Nutt. Bost. Journ. Nat. Hist. 6: 214 



[Man. R. M. 323]. 



A destructive parasite, growing mostly on Piniis contorta and 

 P. Murray ana, reaching an altitude of 2500 m. 



Montana: Columbia Falls, 1892, R. S. Williams, Sgy (on 

 Larix occidentalism.* 



Yellowstone Park: On the Madison, Aug. 2, 1897, Rydberg 

 & Bcsscy, jgjS ; 1885, Tzueedv, /^p (both on Piuiis Miirrayaiia). 



* Razoumofskya Douglasii (Engelm.) Kunze, I.e.; Arcenthobium 

 Douglasii Enge\m. Wheeler's Rep. 6: 253 [Bot. Cal. 2: 106]. 

 Differs from the preceding in being smaller and with axillary 



staminate flowers. It grows on Pseiidotsuga. 



Montana: Missoula, Granite Canon, 1880, Watson (determined 



by Engelmann). 



*The specimens (all staminate) seen, are very small and fragmentary and it is im- 

 possible to determine if they belong to this species or to some of the others, perhaps 

 R. occidentalis. 



