SAXIFRAGE FAMILY 381 



most often campanulate, adnate to the lower part of the gynoecium, often more 

 or less oblique. Sepals 5, often very unequal. Petals 5, often more or less 

 clawed. Stamens 5, opposite to the sepals; filaments usually filiform. Gynoe- 

 cium partly inferior, 1-celled, with 2 parietal, many-ovuled placentae; styles 2, 

 distinct, elongate. Capsule opening between the two more or less divergent 

 beaks. 



Stamens equalling or exceeding the sepals. 

 Panicle open, not spike-like. 



Hypanthium turbinate, about as broad as long; stamens at least twice as long 



as the sepals. 1. H. glabra. 



Hypanthium deeply campanulate or urceolate, about twice as long as broad; 



stamens slightly exceeding the sepals. 

 Hypanthium strongly oblique. 



Hypanthium with the sepals more than 1 cm. long; petioles glabrous or 



sparingly short-hairy. 2. H. Richardsonii. 



Hypanthium with the sepals less than 1 cm. long; petioles long-hispid. 



3. H. hispida. 



Hypanthium not strongly oblique. 4. H. rubescens. 



Panicle contracted, dense, spike-like. 5. H. bracteata. 



Stamens shorter than the sepals. 



Hypanthium short-canapanulate to saucer-shaped, together with the sepals 3-5 mm. 



long. 



Petioles more or less hirsute. 6. H. novomexicana. 



Petioles glabrous or puberulent. 



Hypanthium campanulate, yellowish or pinkish; sepals almost erect. 



Leaf-blades deeply lobed; lobes again lobed and toothed; petals narrowly 

 oblanceolate, nearly twice as long as the sepals. 



7. H. gracilis. 

 Leaf-blades merely once 5-7-lobed and toothed; petals spatulate, from 



equalling to half longer than the sepals. 

 Base of the leaf-blades with an open sinus, or almost cuneate; plant 



1-3 dm. high. 8. H. Hallii. 



Base of the leaf-blades with a narrow sinus; plant 3-5 dm. high. 



9. H. grossulariifolia. 

 Hypanthium saucer-shaped ; sepals spreading. 



Hypanthium with the sepals 4 mm. high, yellowish; blades of the petals 



rhombic. 10. H. flaeescens. 



Hypanthium with the sepals 2-3 mm. high, greenish; petals oblanceolate 



or spatulate. 

 Leaf-blades with shallow lobes. 



Sinus of the leaf-blades closed, the basal lobes often overlapping; 



petals not exceeding the sepals. 11. H. utahensis. 



Sinus of the leaf-blades open; petals exceeding the sepals. 



12. H. parvifolia. 



Leaf-blades cleft at least one-half to the base. 13. H. flabellifolia. 

 Hypanthium deeply campanulate or urceolate, with the sepals 5-10 mm. long. 

 Flowering branches and petioles pubescent. 



Flowers greenish: leaf-blades reniform or rounded, deeply cordate at the base 



lobes and teeth rounded; petioles long-hairy. 14. H. chlorantha. 



Flowers yellowish; leaf-blades broadly oval to orbicular, truncate or slightly 



cordate at the base. 

 Leaf-blades thick, densely glandular-pubescent, 1.5-4 cm. wide, rarely 



cordate at the base. 15. H . ovalifolia. 



Leaf-blades thin, glabrous, or hairy only on the veins, 3-6 cm. wide, cordate 



at the base. 16. H. cylindrica. 



Flowering branches and petioles glabrous or finely puberulent. 



Flowers yellowish; leaf-blades rounded-oval to orbicular, truncate or slightly 



cordate at the base, only the earliest reniform. 17. H . glabella. 

 Flowers greenish; leaf-blades thin, reniform or rarely rounded, with deeply 

 cordate base. 18. H. tenuifolia. 



1. H. glabra Willd. Flowering branches 1-5 dm. high, glabrous, 1-3- 

 leaved, rarely scapiform; leaf-blades cordate or round-cordate, deeply 5-7- 

 lobed, sparingly hispidulous when young, soon glabrate, thin and shining, 3-10 

 cm. broad; lobes triangular-ovate, doubly serrate; panicle lax; hypanthiurn 

 with the sepals 2.5-3 mm. long; petals broadly spatulate or ovate, with a slender 

 claw, about twice as long as the sepals. Damp shady rocks: Yukon Alta. 

 Ore. Alaska. Mont. Je-S. 



2. H. Richardsonii R. Br. Flowering branches 3-4 dm. high, scapiform, 

 .sparingly short-hirsute and glandular-puberulent above; leaf -blades rounded- 

 cordate, 3-6 cm. broad, with rounded lobes and broadly ovate teeth, sparingly 

 hispidulous, ciliate on the margins; petals spatulate, purplish, slightly exceeding 

 the oblong sepals. Hills: Man. S.D. B.C. Plain -Submont. Je. 



