The Montana Natural Heritage Program (Shelly pers. 

 comm.) currently designates Lomatium bicolor var. 

 bicolor as "globally rare" (global rank = G4T3) . 

 It is also listed as "imperiled in Montana" (state 

 rank = S2) , where it is known from Ravalli (12 

 populations) and Sanders (1 population) counties. 

 Variety bicolor also occurs in northern Utah, 

 southwestern Wyoming, and southeastern Idaho. 



None of the state ranks listed above currently 

 provide any direct legal protection for L. bicolor 

 var. bicolor. 



C. DESCRIPTION 



1. GENERAL NONTECHNICAL DESCRIPTION: Lomatium 

 bicolor var. bicolor has somewhat slender stems 

 that are 12-30 inches in height. These stems bear 

 fine lace-like leaves typical of the Carrot 

 Family. Small clusters of yellow flowers occur in 

 a flat topped inflorescence (flower cluster) . 

 Once pollinated, flowers mature into long, 

 narrowly elliptic fruits, which have slight wings 

 along the edges. Long tuberous roots with bulbous 

 thickenings aid in this plant's stability and 

 nutrition. 



2. TECHNICAL DESCRIPTION: Plants acaulescent or 

 caulescent with several basal and one or two 

 cauline leaves. Roots irregularly tuberous, up to 

 7.5 cm. long and 2 cm. in diameter. Leaves 

 ternately-pinnately compound and pinnately to 

 quinately dissected; ultimate leaf segments (30-) 

 80-250, filiform, 2.5-5 mm long, 0.2-0.4 (-0.7) 

 mm. wide, the apices acutfe. Fruiting pedicels 1- 

 10 mm. long at maturity. Mericarps lingulate in 

 cross section, elliptic in outline, 8-16 mm. long, 

 1.5-4.5 mm. wide; lateral wings of the mericarps 

 0.3-0.7 mm wide; oil canals 1 (-3) in the 

 intervals, 2-4 on the commissure (Schlessman 

 1984) . 



3. LOCAL FIELD CHARACTERS: Lomatium bicolor var. 

 bicolor overlaps in its distribution, and co- 

 occurs with, a number of other species in the 

 genus Lomatium in Montana. A number of 

 characteristics are necessary to distinguish these 

 species from one another (Hitchcock et al. 1955- 

 1969) . Lomatium bicolor var. bicolor has a more 

 slender stature, and less distinctly winged 

 fruits, than the very robust and common L. 

 dissectum . Lomatium qeyeri is more similar in 



