WOOTON AND STANDLEY — FLORA OF NEW MEXICO. 435 



Ttpe locality: "On the bank of the Missouri." 



Range: Nebraska and Wyoming to northern New Mexico. 



New Mexico: Clayton (Howell 153). Plains, in the Upper Sonoran Zone. 



The original description of this species might with perfect accuracy be applied to 

 any one of a half dozen of the species now recognized in the genus, in all but one 

 particular. The statement that the ovary is naked is to be taken in relation to the 

 description of the species immediately preceding (iV. c/ecapetafo), in which the ovary 

 is hidden by conspicuous laciniate bracts. 



The plant here accepted as Nuttallia nuda is the only one we have seen "germine 

 nudo," even by comparison, and it has one or two inconspicuous bracts at the bases 

 of the capsules. Its leaves are oblong, sessile, attenuate at the base, and repand- 

 dentate, as described by Pursh, but not "somewhat lanceolate, interruptedly pin- 

 natifid " as described by Torrey and Gray. It is evidently a much rarer plant than 

 Nuttallia stricta, which has passed as Nuttallia rvuda in herbaria for a long time. 



11. Nuttallia stricta (Osterhout) Greene, Leaflets 1: 210. 1906. 

 Eesperaster stricta Osterhout, Bull. Torrey Club 29: 174. 1902. 

 Touterea stricta Rydb. Bull. Torrey Club 30: 276. 1903. 



Type locality: New Windsor, Weld County, Colorado. 

 Range: Western Colorado to northern New Mexico and western Texas. 

 New Mexico: Clayton; Nara Visa; Cross L Ranch; Perico. Plains, in the Upper 

 Sonoran Zone. 



12. Nuttallia Integra (Jones) Rydb. Bull. Torrey Club 40: 61. 1913. 

 Mentzelia multiflora integra Jones, Proc. Calif. Acad. II. 5: 689. 1895. 

 Touterea integra Rydb. Colo. Agr. Exp. Sta. Bull. 100: 235. 1906. 

 Type locality: Rockville, Utah. 



Range: Southern Utah to northern Arizona and northwestern New Mexico. 

 New Mexico: Tunitcha Mountains; Carrizo Mountains. Dry hills and mesas, in 

 the Upper Sonoran Zone. 



13. Nuttallia springeri Standley, Proc. Biol. Soc. Washington 26: 115. 1913. 

 Type locality: Mesa above the Abbott Ranch, Rito de los Frijoles, northwest 



of Santa Fe, New Mexico. Type collected by Frank Springer (no. 4). 

 Range: Known only from type locality, in the Upper Sonoran Zone. 



3. ACROLASIA Presl. 



Annuals with slender, branching, rather weak, white stems, long intemodes, and 

 narrowly lanceolate sessile cauline leaves, with a rosette of basal leaves, the whole 

 plant hispidulous with barbed hairs; leaves entire, coarsely toothed, or pinnatifid; 

 flowers small, axillary or congested at the ends of the branches; sepals 2 to 3 mm. long; 

 petals 5, yellow, obovate, 3 to 4 mm. long; filaments not petaloid; capsules elongated, 

 cyUndric or clavate, over 1 cm. long, with filiform placentae, not lamellated between 

 the seeds; seeds several, irregularly prismatic, finely tuberculate. 



key to the species. 



Cauline leaves pinnatifid 1. A. albicaulis. 



Cauline leaves mostly entire, Unear-lanceolate 2. A. parviflora. 



1. Acrolasia albicaulis (Dougl.) Rydb. Bull. Torrey Club 30: 277. 1903. 



Mentzelia albicaulis Dougl.; Hook. Fl. Bor. Amer. 1: 222. 1833. 



Type locality: "On the arid sandy plains of the river Columbia, imder the shade 

 of Purshia tridentata." 



Range: New Mexico to Montana and British Columbia. 



New Mexico: Aztec; Cliff; Organ Mountains; Carrizo Mountains. Dry hills, in 

 the Upper Sonoran Zone. 



