5G SAXIFRAGACE^. 



4. T. heterophylla, H. & A. Similar, very slender: petals acute. Cent. Cal. 



5. T. affinis, Bolander. Stouter: calyx-tube rough, partly adnate. Cal. 



6. T. parviflora, Hook. Calyx obconical: ovary half inferior. Or. Wash. 



7. T. tenella, Walp. Slender, 2-9 in. high : ovary nearly free. N. E. Cal. 



8. TIAB.ELLA, Linnaeus. 



1. T. uuifoliata, Hook. Leaves 3-5-lobed, crenately toothed. S. F. Bay, N. 



2. T. trifoliata, L. Most of the leaves 3-foliolate. Or. to Alaska. 



9. MITELLA, Toumefort. 



L M. BreW^eri, Gr. Leaves 2-.3 in. broad: scape naked: petals J in. long. S.N. Mts. 



2. M. trifida, Grah, Petals smaller, 3-5-parted. In shade. Coast Ranges. 



3. M. caTxlescens, Nutt. Stouter: 1 or more leaves on scape. Klamath River, N. 



10. HEUCHERA, Linnaeus. 

 glabra, Willd. Leaves acutely lobed, incised: panicle loose. Or., N. 

 rubescens, Torr. Leaves crenately lobed ^-1 in. broad. S. N. Mts., N. & E. 

 xoicrantlia, Dougl. Leaves obtusely lobed, crenate, 2-4 in. broad. 

 pilosissiina, F. & M. Very villous, viscid: calyx-base rounded. Cal. Coast, 

 cylindrica, Dougl. Flowers nearly spicate, ^-J in. long: petals minute. 



11. PARNASSIA, Toumefort. 



1. P. palustris, L. Leaves ovate to ovate-cordate ^1 in. long: petals ^-J in, long. 

 Var. Califomica, Gr. Larger in every way. In wet places, mountains. 



2. P. fimbriata. Banks. Leaves reuiform to cordate: appendages few or a scale. 



12. CHRYSOSPLENIUM, Linnajus. 

 1. C. glechomaefolium, Nutt. Decumbent in wet pl.ices: leaves J- J in. long. 



13. PHILADELPHUS, Linnaeus. 



1. P. Iiewisii, Pursh. Spreading, 3-5 ft. liigh: stigmas narrow. S. N. Mts. 



2. P. Gordonianus, Lindl. Larger in every way: leaves mostly toothed. Coast. 



14. CARPENTERIA, Torrey. 

 1. C. Californica, Torr. Leaves narrowly lanceolate. King's River, CaU 



15. WHIPPLE A, Torrey. 

 1. W. modesta, Torr. Stems slender, spreading: calyx and corolla white. 



