233 Rydberg : Studies on the Rocky Mountain Flora 



Thelypodium macropetalum sp. nov. 



A glabrous perennial, 4-6 dm. high : basal leaves oblanceolate 

 or spatulate, short-petioled, 2—5 cm. long : lower stem-leaves ob- 

 long, obtuse, sessile, with rounded auricles at the base, 5-6 cm. 

 long ; upper leaves lanceolate-sagittate, acute ; pedicels in fruit 

 about I cm. long, divaricate : sepals about 5 mm, long, purplish 

 with white margins ; petals purple, spatulate, long-clawed, nearly 

 three times as long as the sepals : pods 4—5 cm. long, ascending 

 or erect and somewhat incurved. 



This is related to T. sagittat2un (Nutt.) Heller and T. paniada- 

 tuvi A. Nelson. From the former, it differs in the smaller leaves, 

 the rounder auricles, the erect, not reflexed nor spreading pod ; and 

 from the latter by the much longer petals. It grows at an altitude 

 of 1,000-1,200 m. 



Utah: Farmington, 188 1, J'/ E. Jones, 18^1 (type in herb. 

 N. Y. Bot. Garden). 



Idaho: Soda Springs, 1892, Isabel Miilford. 



Thelypodium Utahense sp. nov. 



Annual or biennial : stem 4-6 dm. high, sparingly pubescent 

 below; leaves all lanceolate in outline, 5-10 cm. long, lanceolate, 

 glabrous ; segments broad and crowded, oblong-lanceolate to tri- 

 angular : pedicels very short, in fruit scarcely more than i mm. 

 long : sepals oblong, about 2 mm. long : petals spatulate, almost 

 twice as long, white : pod about 3 cm. long, strongly reflexed. 



This is probably nearest related to 5. reflexuni Nutt., which is 

 decidedly hispid on the stem and the veins of the leaves and has 

 much narrower leaf-segments. It grows at an altitude of about 

 600 m. 



Utah : St. George, 1880, M. E. Jones (type in herb. N. Y. 

 Bot. Garden); 1877, E. Palmer, 28. 



Lepidium Jonesii sp. nov. 



Lepidmuimontaiinniv-A.x. alf ssoides ] ones, Zoe, 4: 266. 1893. 

 Not L. alyssoides A. Gray. 1849. 



Perennial with a short woody caudex : stems 2-3 dm. high, 

 glabrous, branched, glabrous : basal leaves pinnatifid with linear 

 acute divisions ; stem-leaves similar or the upper entire, narrowly 

 linear : racemes rather short and dense ; pedicels in fruit 6-8 mm. 

 long, spreading : sepals oblanceolate, obtuse ; petals white, much 



