312 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



SAXIFKAGA. Saxifrage. 



Stems producing peronniiil l)r:inches, these densely beset with small 

 leaves. 



Leaves coriaceous and evergreen, entire. 



Filaments clavate; leaves spatulate, obtuse, not ciiiate . 1. S. tolmiei. 



Filaments subulate; leaves lanceolate, acute, ciiiate 2. S. hronchialis. 



Leaves not coriaceous thin, 3 to 5-lobed or cleft. 



Calyx united only at base; leaves cleft 3. S. cespitosa. 



Calyx united to the middle; leaves lobed 4. S. adscendens. 



Stems not producing perennial leafy branches. 



Calyx campanulate- stems leafy; basal leaves crenate; cauline 



few, entire or 3-lobed .5. S. dehilis. 



Calyx rotate; leaves all or mostly ba.sal. 

 Leaves serrate or coarsely dentate. 



Petals dissimilar; leaves spatulate, serrate, short- 



petioled 9. S. hoiujardi. 



Petals similar; leaves cordate or reniform, coarsely 

 toothed, long-petioled. 



Caudex bulbous; herbage somewhat glandular; 



leaves usually doubly dentate 6. S. mertensiana. 



Caudex not bulbous: leaves glabrous, simply den- 

 tate. 



Petals spatulate-obovate 7. S. odontophylla 



Petals elliptic, not clawed 8. S. nehomana. 



Leaves entire or merely crenate, all basal. 



Leaves ovate or oblong, petioled, usually coarsely cre- 

 nate. 



Leaves thick, subcoriaceous, red-tomentose beneath 



at least when young 10. S. marshallii. 



Leaves not subcoriaceous, often thin, glabrous or 



nearly so 11. S. calif ornica. 



Leaves entire or nearly so, oblong-spatulate to ovate. 

 Calyx lobes erect, shorter than the tube; petals 



wanting 17. S. apetala. 



Calyx lobes spreading, about as long as the tube; 

 petals present. 



Petals not exceeding the calyx lobes. 



Petals obovate 12. S. plantaginea. 



Petals narrowly oblong 13. S. columbiana. 



Petals much longer than the calyx lobes. 



Stems 30 to 60 cm. tall; flowers 7 to 9 



mm. broad; leaves without petioles . 14. S. oregana. 



Stems 10 to 30 cm. high; flowers smaller; 

 leaves more or less distinctly petioled. 

 Flowers 6 to 8 mm. broad; leaves el- 

 liptic, villous and vi.scid above 15. S. integr'ifi 



Flowers 3.5 to 5 mm. broad; leaves 

 usually broadly ovate; petals per- 

 sistent 16. S.frar/osa. 



1. Saxifraga tolmiei Torr. & Gr. Fl. 1: 567. 1840. 

 Type locality: "Northwest coast."' Collected b\^ Tolmie. 

 Kange: Washington and Oregon in the Cascade and Olympic Mountains. 



