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. . 



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



as the sepals. 1. ^- glabra. • 



Hypanthium deeply campanulate or urceolate. about twice as long as broaa; 



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. Richardsomt. 



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

 - 3. //. hispida, 



■ Hypantliium not strongly obhque. - 4. H. rubescens. 



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



Stamens shorter than the sepals. 



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



long. « Tr • 



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



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. if. Hallh. 



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



9. H. grossulanifoha, 



' Hypanthium saucer-shaped; sepals spreading. , , , , ^ ,_ 



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



rhombic. 10. if. flavescens, 



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. parmfoha. 



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. , , , , , . .. ^x. x. 



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 sUghtly 



cordate at the base. , , ^ ^ -j „ i« 



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



cordate at the base. 15* -"• otalijoUa. 



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

 at the base. , ^ 16 ii. cyhndrica. 



Flowering branches and petioles glabrous or finely puberulent. 



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



cordate at the base, only the earhest reniform. 17. if. glabella. 



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

 cordate base. 18- i^- tenuifoha. 



1. H. glabra Willd. 



Flowering branches 1-5 dm. high, glabrous, 1-3- 

 xt;£Lvea, rareiy scapiiorm; 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; hypanthium 

 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. MonL 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— SubmonL Je. 



