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



EXPLANATION OF PLATE XXIV. 



Fig. 6. Ribes hittellianuni, sp. nov. 



a. Diagrammatic representation of the flower; X 5. 



b. Leaf, natural size. 

 Fig. 7. Ribes glaucescens, sp. nov. 



a. Diagrammatic representation of the flower; X 5. 



b. Leaf, natural size. 



Fig. 8. Ribes oligacanthum, sp. nov. 



a. Diagrammatic representation of the flower; X 5; dotted lines 



indicate the shape of the ovary and calyx-tube. 



b. Leaf, natural size. 

 Fig. 9. Ribes sericemn, sp. nov. 



a. Flower, natural size. 



b. Buds, natural size. 



c. Leaf, natural size. 



d. Petal, spread out; X 2. 



e. Petal as it appears in flower; X 2. 

 /. Stamen; X 2. 



Fig. 10. Ribes hystrix, sp. nov. 



a. Flower and bud, natural size. 



b. Leaf, natural size. 



c. Stamen; X 2. 



d. Petal; X 2. 



