It is very likely that current management is detrimental to this 

 species. 



Thlaspi pcLTviflorum A. Nels. 



Small-flowered pennycress 



DESCRIPTION: Small-flowered pennycress is a short-lived 

 perennial with 1-few simple stems, up to 20 cm (8 in) tall, from 

 a simple or branched rootcrown. Lance-shaped basal leaves, 1-4 

 cm (0.5-2 in) long, have entire margins and a slender petiole ca. 

 as long as the blade. The alternate stem leaves are smaller with 

 bases that clasp the stem. Foliage is glabrous. Short-stalked, 

 white flowers are born at the tip of each stem in a dense 

 inflorescence that expands as the fruits mature. Each flower has 

 4 glabrous sepals, ca. 1 mm long; 4 petals, ca. 3 mm long; and 4 

 long and 2 short stamens. The narrowly heart-shaped fruits, 4-10 

 mm long with a style that is ca. 0.5 mm long, spread away from 

 the stem. 



Thlaspi parviflorum is very similar to the more common T. 

 fendleri, but the latter has sepals that are 2-3 mm long and 

 petals that are 4-6 mm long, and the style on mature fruits is 1- 

 3 mm long. 



GEOGRAPHIC DISTRIBUTION 



Global distribution: central Idaho, northwest Wyoming and 

 southwest Montana. 



Montana distribution: Beaverhead, Carbon, Madison, Park and 

 Silver Bow counties. 



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