134 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



So far as I have been able to discover, there are but two 

 plants of R. trichocalyx in the Park. Both grow back of 

 the statue of Halleck where two paths meet. R. Coiilteri 

 grows there too; but the best specimen is to be found 

 near the Haight St. entrance. It is also very abundant 

 in other parts of the Park, being more desirable as a cul- 

 tivated plant owing to its greater size and compact habit. 



Taking the plants in the Park for comparison, supple- 

 mented by the specimens in the Herbarium of the Cali- 

 fornia Academy of Sciences, the following are the points 

 of differences: — 



Habit.— R. Coulteri forms large, erect, close clumps, with many strong 

 branches from along the stems. R. trichocalyx does not form close clumps 

 because the stems as they grow tall have a tendency to lean over as if too 

 weak to stand; they are more leafy, less branched, and neither so tall nor so 

 stout. 



Leaves. — The leaves of R. Coidteri are thicker in texture, with fewer and 

 larger divisions, becoming simple on the peduncle but never growing close 

 under the flower, thus leaving the upper part of the peduncle naked. The 

 differences in the leaves, however, are not always to be depended on as 

 the leaves of R. trichocalyx are so variable, often closely approaching those 

 of R. Coulteri. The upper leaves of R. trichocalyx however always 

 become more dissected on the peduncle and grow close under the flower. 



Inflorescefice. — The peduncles of ^. Coulteri are stouter and more spread- 

 ing than are those of R. trichocalyx. 



Calyx. — R. Coulteri has a smooth calyx; that of/?, trichocalyx is setose. 



Corolla. — In the specimens in the park, R. Coulteri has larger flowers, 

 with the texture less crape-like than in R. trichocalyx. We have specimens 

 of the latter in the Herbarium with corollas fully as large as any of R. 

 Coulteri. 



Fruit. — When the walls of the capsule break away leaving the skeleton of 

 the pod, the ribs of the pod oi R. Coulteri are more slender, becoming atten- 

 uated towards the apex and convolute; those of R. trichocalyx are stouter, 

 uniform, and do not twist around. 



The figures show the differences in the buds and the 

 leaves of the peduncle. They were drawn from fresh 

 specimens from Golden Gate Park, smaller than ordi- 

 narily because they were the last of the season. Both spe- 

 cies bore fruit, but as it did not ripen, I was unable to com- 

 pare the seeds. The pods from which the comparison was 

 made came from herbarium specimens. 



