Rydberg: Studies on the Rocky Mountain flora 309 



lobes are equal or not, but in his subsequent treatise of the genus 

 in De Candolle's Prodromus he expressly stated that they are 

 unequal. In the only two specimens found in the herbarium of 

 the New York Botanical Garden, in my opinion belonging to E. 

 strictum, the outer perianth lobes are very broadly oval while the 

 inner are oblong. The species should therefore be associated 

 with E. dichotomum Dougl. and not with E. racemosum Nutt. and 

 E. Wrightii Torr., differing from the first principally in the glabrous 

 involucres. Both E. strictum and E. dichotomum have been 

 collected in Idaho. 



The genus Eriogonum is represented by over one hundred 

 species in the Rocky Mountain region. The following ones are 

 not recorded either by Coulter & Nelson nor in my Flora of Colo- 

 rado or in my Flora of Montana, but they should be included in 

 the flora: E. androsaceum Benth. in Alberta, Montana, and British 

 Columbia; E. thymoides Benth., E. compositum Dougl., E. prolif- 

 erum Benth., E. elatum Dougl., E. strictum Benth., E. spergulinum 

 A. Gray, and E. vimineum Dougl., in Idaho; E. dichotomum in 

 Idaho and Montana; E. micranthum Nutt., E. nidularium Coville, 

 and E. Baileyi S. Wats., in Idaho and Utah; E. Porteri Small, E. 

 pulvinatum Small, E. longilobum M. E. Jones, E. ochrocephalum 

 S. Wats., E. villiflorum A. Gray., E. Shockleyi S. Wats., E. poli- 

 folium Benth., E. Thompsonae S. Wats., E. aureum M. E. Jones, 

 E. spathulatum A. Gray, E. leptophyllum Torr., E. bicolor M. E. 

 Jones, E. clavellatum Small, E. sulcatum S. Wats., E. Mearnsii 

 Parry, E. ramosissimum Eastw., E. densum Greene, E. turbinatum 

 Small, E. insigne S. Wats., E. deflexum Torr., E. nutans T. & G., 

 E. Wetherillii Eastw., E. Thomasii Torr., E. subreniforme S. Wats., 

 E. Parryi A. Gray, E. Ordii S. Wats., E. trichopodum Torr., E. 

 angulosum Benth., and E. puberulum S. Wats., in Utah; E. Hooked 

 in Utah and Wyoming; E. tenellum Torr. in Colorado; and E. 

 depauperatum Small in the Black Hills of South Dakota. 



Chorizanthe spathulata Small sp. nov. 



A more or less branched annual; stem 5-20 cm. high, erect, 

 strigose-canescent; branches erect, strict; lower leaves petioled, 

 1 .5-3 cm. long; blades broadly spatulate, somewhat fleshy, hirsute- 

 strigose on both sides, rounded and sometimes mucronate at the 



