SAXIFRAGE FAMILY 195 



(2) Calyx smooth 



(a) Calyx lobes longer than tube; fruit 



smooth / oxyacanthoides 



(b) Calyx lobes shorter than tube; fruit us- 



ually bristly R. setosum 



2. Stems smooth 



a. Flowers yellow, 10-25 mm. long; fruit smooth, 



black, rarely yellow R. atireum 



b. Flowers greenish to white or red 



(1) Berries bristly 



(a) Leaves smooth; fruit globose 



x. Flower saucer-shaped; floral bracts tiny, 



1-2 mm. long R. prostrdtum 



y. Flower bell-shaped ; bracts 4-6 mm. 



long R. WolHi 



(b) Leaves hairy, usually sticky ; fruit ovoid ; 



flower bell-shaped R. viscosissimum 



(2) Berries smooth or nearly so 



(a) Flower clusters hanging; calyx tubular 



x. Calyx hairy ; fruit red R. cereum 



y. Calyx smooth; fruit black R.floridum 



(b) Flower clusters erect or ascending; calyx 



bell-shaped R. hudsonidnum 



Saxifraga Linne 1753 Saxifrage 



( Lat. saxum, rock, f ran go, break, from the habitat) 

 PL 30, fig. 2, 5, 7, 9, 10; PL 31, fig. 1-3. 



Sepals 5, united, free from or grown to the base of the ovary, petals 

 5, white, to yellow or red, usually alike, stamens 10. ovary superior or 

 partly inferior, 2-celled, 2-lobed above, capsule 2-beaked, many-seeded ; flow- 

 ers solitary or in corymbs or panicles,; leaves alternate or opposite, entire to 

 pinnatifid : perennial. 



1. Flowers white or whitish to purple 



a. Flowers purple 



(1) Leaves opposite, sessile, fleshy, ovate, en- 



tire ; stems prostrate ; flowers solitary 5. oppositifolia 



(2) Leaves alternate, stalked, mostly basal, re- 



niform, lobed ; stems erect ; flowers large. 



in an oblong clustei 5. J&mesii 



b. Flowers white to whitish, pinkish or yellowish 

 (1) Stems leafy 



