Table l.--Seed and seedlings obtained from artificial hybridization between Stansbury 

 aliffrose (Comes) 3 antelope bitterbrush (Putr) , aliffrose-bitterbrush hybrid 

 (Hybrid) , and Apache plume (Fapa)lJ 



Maternal 

 (seed) 

 plant 



Paternal 

 (pollen) 

 plant 



No. of seeds 

 col lected 

 1967-1971 



No. of seeds 

 germinated 



Percent germination 



1967-1971 



Low 



High 



No. of 



seedl ings 

 alive 

 8/28/72 



Comes 

 Comes 

 Comes 



Putr 

 Putr 

 Putr 



Fapa 

 Fapa 

 Fapa 



Hybrid 

 Hybrid 

 Hybrid 



Fapa 

 Putr 

 Hybrid 



Fapa 



Comes 



Hybrid 



Comes 



Putr 



Hybrid 



Fapa 



Comes 



Putr 



2/ 



f-/ 1,418 

 -;i,544 

 - 592 



5/ 



19 

 606 

 185 



/3,647 

 7/1,899 

 -1,735+ 



^l 



18 

 369 

 249 



47 

 832 

 396 



19 

 491 

 171 



^/ 19 

 10 

 



18 

 251 

 225 



3.3 

 53.9 

 66.9 



100.0 

 81.0 

 92.4 



.52 

 .53 

 .0 



100.0 

 68.0 

 90.4 



0.0 

 .0 

 29.4 



71.7 

 91 .4 



,0 



22.5 

 48. 1 



4.2 

 63.5 

 80.0 



92.5 

 94. 1 



14.3 



100.0 

 100.0 



7 



97 

 28 



7 



103 

 31 





 

 



2 

 15 

 41 



—Species symbols obtained from Plummer and others (1966). 



^-'^In 1971, 784 seeds from this cross were collected. Only 37 of these seeds were 

 plump and obviously filled; 33 (89.2%) of these plump seeds germinated. 

 ,/ 



^ In 1971, 562 seeds from this cross were collected; 362 of these seeds were plump, 

 the rest appeared shriveled. The plump seeds showed a germination percentage of 

 91.6, whereas surprisingly, 5.5% of the shriveled seeds germinated. 



^^In 1971, 240 of 295 seeds collected from this cross were plump and 236 (97.2%) of 

 the plump seeds germinated. 



-^'^Only obviously filled seeds counted. Cross made during only 1971. 



^'^In 1968, 19 of 133 seeds (14.4%) collected from this cross germinated. 



7/ 



Cross made only during 1970. 

 ^^Cross made only during 1971. 



These results suggest that emasculation is not necessary and that mass pollination 

 of cliffrose flowers just as they begin to open may be sufficient for hybridization. 

 However, the progeny from such crosses should be carefully inspected to identify the 

 ones that may occasionally develop from self-fertilization. 



Distribution and Habitat: Stansbury cliffrose is commonly found on dry, rocky 

 foothills and mesas and frequently is associated with pinyon and juniper trees. It is 

 sometimes found at the lower fringes of the ponderosa pine zone at elevations from 1,220 

 to 2,440 m (4,000 to 8,000 feet) in favorable sites in the big sagebrush (^Artemisia 

 tridentata) , blackbrush, {Coleogyne ramosissima) , and salt desert shrub types. The 

 distribution of Stansbury cliffrose ranges from southern Colorado to Nevada, Utah, 

 Arizona, southern California, and northern Mexico (Kearney and Peebles 1960) . The 

 northernmost population of cliffrose is found in Cache County, Utah. This shrub has 



19 



