466 Rydberg: Studies on the Rocky Mountain flora 



ASCLEPIADACEAE 



Astephanus utahensis Engelm., Philibertella cynanchoides (Dec.) 



Vail and P. heterophylla (Engelm.) Vail, A sclepias erosa Torr., A- 



macrosperma Eastw. and A. labriformis Jones have been collected 



in Utah; Acerates lanuginosa (Nutt.) DC, in the Yellowstone Park; 



Asclepias ovatifolia, in Saskatchewan ; and Asclepias mexicana Cav., 



in Idaho. 



CONVOLVULACEAE 



Cressa erecta Rydb. sp. now 



Stem branched, with a woody base, erect, 2-3 dm. high with 

 erect branches, silvery canescent; leaves elliptic, 5-7 mm. long, 

 acute at both ends, sessile, silvery canescent; pedicels in fruit 

 6-10 mm. long, usually exceeding the leaves; bracts elliptic, 3 

 mm. long; sepals 4-5 mm. long, oval, equaling the corolla-tube; 

 corolla white; lobes elliptic, acutish, rarely spreading; filaments 

 filiform, slightly pubescent; ovary densely pubescent; styles fili- 

 form. 



This differs from C. depressa Goodding in the erect stem and 

 branches, the more silvery pubescence, the longer pedicels (in C. 

 depressa shorter than the leaves) and the comparatively narrower 

 corolla-lobes. 



Utah: Near Beck's Hot Springs, Salt Lake County, July, 

 1905, Garrett 870/ (type, in herb. N. Y. Bot. Gard.). 



CUSCUTACEAE 

 Cuscuta curta (Engelm.) Rydb. sp. nov. 

 Cuscuta Gronovii curta Engelm. Trans. St. Louis Acad. 1: 507. 

 1859. 

 In saline districts of Utah and Colorado. 



POLEMONIACEAE 

 Dr. Brand* reduces the amply distinct Phlox muscoides Nutt. to 



* Pflanzenreich, Vol. 4, Fam. 250. The following pages contain a good deal of 

 criticism of Dr. Brand's monograph of this family. The monograph is one of the 

 best, differing in that respect from most works done by Europeans on American 

 plants. The citation of publication is very carefully prepared, correct, and com- 

 plete; but Dr. Brand has fallen into the same errors as most foreigners do, in not 

 trying to find out exactly what the types are or what plants the descriptions really 

 represent. He made definite pronunciations as to species he had never seen, and 

 made synonyms from mere guesses. My criticisms are limited to the Rocky Mountain 

 species. If the Pacific Slope species are considered, probably as many more incon- 

 gruities could be pointed out. 



