SENSITIVE 



SCIENTIFIC NAME: UOLFFIA COLUMBIANA Karst. 



COMMON NAME: Columbia water-meal 



FAMILY: Lemnaceae (Duckweed Family) 



MONTANA STATUS: Sensitive 



GLOBAL and STATE RANKS (TNC): G5/S2 



USFUS STATUS: None 



USFS STATUS: None 



STATUS IN OTIcR STATES: Threatened in ND 



GLOBAL DISTRIBUTION: Throughout most of N. Americ 



south to S. America. Sparse. 

 MONTANA COUNTIES: Flathead, Lake, Missoula 

 LAND OWNERSHIP: Flathead Indian Res., private 

 PHYSIOGRAPHIC DISTRIBUTION: Flathead River and CI 



Fork River drainages 

 HABITAT: Fresh water of ponds and sloughs in the 



valley zone, 880-950 m (2,900-3,100 ft.) 

 PHENOLOGY: This species has not been observed 



blooming in Montana 

 COMMENTS: This species is locally common in the 



potholes south of Flathead Lake. 



SCIENTIFIC NAME: XYLORHIZA GLABRIUSCULA Nutt. 

 COMMON NAME: Smooth woody aster 

 FAMILY: Asteraceae (Sunflower Family) 

 PERTINENT SYNONYMS: Machaeranthera qlabriuscula 



(Nutt.) Cronq. & Keck 

 MONTANA STATUS: Sensitive 

 GLOBAL and STATE RANKS (TNC): G4/S1 

 USFWS STATUS: None 

 USFS STATUS: None 



STATUS IN OTHER STATES: Uncommon in SD 

 GLOBAL DISTRIBUTION: South-central MT and w. SD, 



south to CO and UT. Peripheral. 

 MONTANA COUNTIES: Carbon 



LAND OWNERSHIP: BLM, Miles City District; private 

 PHYSIOGRAPHIC DISTRIBUTION: Pryor Mtns.- Big Horn 



Canyon area 

 HABITAT: Barren, often heavy, clay soil of slopes and 



outcrops in sagebrush grassland and desert shrubland 



in the valley zone, 1160-1370 m (3,800-4,500 ft.) 

 PHENOLOGY: Flowering in late May and June 



SCIENTIFIC NAME: WYETHIA SCABRA Hook. 



COMMON NAME: Rough mule's-ears 



FAMILY: Asteraceae (Sunflower Family) 



MONTANA STATUS: Sensitive 



GLOBAL and STATE RANKS (TNC): G4/S1 



USFWS STATUS: None 



USFS STATUS: None 



STATUS IN OTHER STATES: None 



GLOBAL DISTRIBUTION: South-central MT south to CO, UT 



and AZ. Peripheral . 

 MONTANA COUNTIES: Big Horn, Carbon 

 LAND OWNERSHIP: BLM, Miles City District; Big Horn 



Canyon N.R.A.; private 

 PHYSIOGRAPHIC DISTRIBUTION: Pryor Mtns.- Big Horn 



Canyon area 

 HABITAT: Open, often sandy soil of desert shrubland 



and juniper woodland in the valley zone, 1070-1370 m 



(3,500-4,500 ft.) 

 PHENOLOGY: Flowering in June 

 COMMENTS: Our plants are var. scabra . Most known 



populations of this species in Montana are small. 



