SAXIFRAGE FAMILY 381 



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

 or less oblique. Sepals 5, often ver^' unequal. Petals 5, often more or less 

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

 cium partly inferior, 1-celled, with 2 parietal, man3•-o^'uled 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-Uke. 



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



as the sepals. 1. H. glabra. 



Hj-pantMum deeply campanulate or urceolate, about trwice as long as broad; 

 stamens shghtly exceeding the sepals. 

 Hj-panthium strongly oblique. 



Hypantliium with the sepals more than 1 cm. long: petioles glabrous or 



sparingly short-hairy. 2. H. Richardsonii. 



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



3. H. hispida. 

 Hypantliium not strongly obhque. 4. H. rubescens. 



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



Stamens shorter than the sepals. 



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

 long. 

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



Petioles glabrous or puberulent. 



Hj-panthium 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. S. H. Hallii. 



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



9. H. grossulariifoHa. 

 Hj-panthium saucer-shaped; sepals spreading. 



HMianthium ^Tith the sepals 4 mm. high, yellowish; blades of the petals 



rhombic. 10. H. ftarescens. 



Hypantliium 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. parrifolia. 

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

 Hj'pantliium deeply campanulate or urceolate, ^vith the sepals 5-10 mm. long. 

 Flowering branches and petioles pubescent. 



Flowers greenish' leaf-blades reoiform 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 tliick, densely glandular-pubescent, 1.5-4 cm. wide, rarely 



cordate at the base. 15. H. oralifolia. 



Leaf-blades thin, glabrous, or hairy only on the veins, 3-6 cm. \vide, 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 sUghtly 



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



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

 cordate base. 18. H. tenuifolia. 



1. H. glabra \Mlld. 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 j'oung. soon glabrate, thin and shining, 3-10 

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

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

 claw, about twice as long as the sepals. Damp shadj- 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. 



