286 BORAGINACEAE. 



7. Lappula occidentalis (S. Wats.) Greene. (Echinospermum Redowskyi 

 occidentalis S. Wats.) In sandy places and on dry plains from Sask. and 

 Wash, to Mo. and N. M. Alt. 4000-10,000 ft. Twin Lakes; mesas near 

 Pueblo ; South Cheyenne Canon ; Colorado Springs ; plains near Denver ; 

 Mancos ; Cimarron ; river-bluffs, north of La Veta ; Mountain View ; An- 

 tonito; Valley Spur; along Uncompahgre River near Ouray; Los Pinos ; 

 Ft. Collins ; Howe's Gulch ; bank of Arkansas River ; Quimby ; Spring Canon ; 

 Manitou. 



8. Lappula cupulata (A. Gray) Rydb. In river valleys from S. D. and 

 Ida. to Tex. and Colo. Alt. 4000-5500 ft. New Windsor, Weld Co. ; mesas 

 near Pueblo; Hotchkiss, Delta Co.; Canon City; Denver; Ft. Collins. 



9. Lappula collina Greene. On dry hills from Colo, and Utah to Tex. and 

 Ariz. Palisades. 



2. ERITRICHIUM Schrader. MOUNTAIN FORGET-ME-NOT. 



Dorsal surface of the nutlets margined with a ridge-like ring, but not toothed. 



1. E. elongatum. 

 Dorsal surface of the nutlets with a toothed border ; corolla 4-5 mm. wide. 



2. E. argenteum. 



1. Eritrichium elongatum (Rydb.) White. (E. aretioides elongatum 

 Rydb.) On high mountain tops from Mont, and Ore. to Colo. Alt. 11,000- 

 12,000 ft. Headwaters Clear Creek; above Beaver Creek. 



2. Eritrichium argentum White. (Omphalodes nana aretioides A. Gray) 

 On alpine peaks from Wyo. to Colo, and Utah. Alt. 11,000-14,400 ft. 

 Gray's Peak ; mountains above Como ; mountains of Estes Park, Larimer Co. ; 

 Pike's Peak; Chicago Lake; Argentine Pass; Bald Mountain; Bush Creek, 

 Custer Co. 



3. PIPTOCALYX Torr. 



i. Piptocalyx circumscissa Torr. (Krynitzkia circumscissa A. Gray) In 

 dry soil from Ida. and Wash, to Colo., Ariz, and Calif. Routt. Co., near 

 Wyoming line. 



4. OREOCARYA Greene. 



Fruit depressed ; nutlets at the margin separated by an open space. 

 Leaves appressed-canescent, not hispid ; corolla 5-7 mm. wide. 



1. O. cinerea. 

 Leaves with a fine canescence intermixed with hispid hairs ; corolla less than 



5 mm. wide. 

 Plant low, grayish, not yellowish-hispid above ; racemes short, 2-ranked. 



2. O. siiffmticosa. 

 Plant tall, yellowish-hispid above; racemes in fruit elongated, i-ranked. 



3. O. miilticaulis. 

 Fruit conical or ovoid ; nutlets touching each other. 



Corolla-tube not exserted. 



Floral leaves long, many times longer than the short flower-clusters. 



4. O. virgata. 



Floral leaves comparatively short, little if at all surpassing the flower- 

 clusters. 



Sepals ovate-lanceolate, only slightly exceeding the mature nutlets ; in- 

 florescence a panicle with rather few branches. 



