i9"] NELSON— IDAHO PLANTS 143 



acteristic caudex and the presence of the stylopodium leave scarcely any doubt 

 that it is a Cynomarathritm. 



Secured by Macbride in the shale slides near the summits of the moun- 



J 



1502. 



Dodecatheon pauciflorum shoshonensis, n. var. — Similar to 

 the species in size, but the root system consisting of a short corm 



seem 



season, at which time there has formed laterally on the corm 1 or 2 

 elongated bulblike buds. These probably give rise to the next 

 year's plants. The flowers are paler than in the species. 



The material at hand is rather scanty and over-mature. Possibly ampler 

 collections may show further differences. The specimens were secured by 

 Nelson and Macbride at Shoshone Falls, July 26, 191 1, no. 1362. 



Phacelia firmomarginata, n. sp. — Annual or possibly biennial, 2 

 divaricately branched from ; the base, with assurgent branched 

 stems 1-2 dm. long: pubescence short, fuscous, obscurely glan- 

 dular, with some small scattering hispid hairs which are most 

 numerous on the calyx: leaves alternate, rather small, 1-4 cm. 

 long, sessile or short-petioled, oblong in outline, pinnately cleft or 

 parted into few ovate or obovate crenulate- toothed lobes: the 

 ebracteate spikes dense even in fruit, 3-6 cm. long: calyx decidedly 

 enlarged in fruit, apparently persistent, cleft to the base and only 

 loosely inclosing mature capsule; sepals narrowly oblong-lanceolate, 

 at maturity about 1 cm. long, reticulated by the veins which run 

 from the stout mibrib to the greatly thickened firm hispid margins: 

 corolla minute, pale or white, much shorter than the calyx, the 

 rounded denticulate lobes about half as long as the short broad 

 tube, the vertical folds obsolete; stamens and style well included: 

 capsule ovoid, minutely hispid-pubescent, 3-4 cm. long, 4-seeded: 

 seeds oblong, about 2 mm. long, brown, distinctly pitted. 



Probably nearest P. hispida, from which it is quite distinct. It is a plant 

 of the desert, being secured by Macbride on dry hillsides near Twilight Gulch 

 in Owyhee County, June 23, 191 1, no. 979. 



Phlox longifolia filifolia, n. var. — The woody caudex short, 

 freely branched: the stems delicately filiform, 1-3 dm. long: 

 leaves filiform, about 1 mm. broad, mostly 3-6 cm. long but often 



2 In full fruit June 23 and the root leaves largely wanting. 



