SAXIFRAGE FAMILY 193 



(2) Petals distinct, spatulate and clawed; 



leaves and flower stalks sparsely hairy ; 

 leaf lobes with spiny teeth H. Hdllii 



b. Calyx saucer-shaped,, greenish ; petals tiny H. parvifolia 



Jamesia Torrey and Gray 1840 

 (Xamed for James, an American botanist) 

 " PL 31, fig. 9. 



Sepals 5, united into a calyx, grown together with the ovary, petals 5, 

 white, stamens 10, the alternate shorter, ovary 1-celled, styles 3-5 ; flowers 

 in terminal clusters ; leaves opposite, simple, toothed ; shrub. 

 Stems 2-6 ft. high ; leaves gray-hairy below, 2-5 cm. 



long; flowers 1-2 cm. wide J. americdna 



Lithophragma Nuttall 1840 



(Gr. lithos, stone, phragma, hedge) 



PI. 31, fig. 4. 



Sepals 5, united into a bell- or top-shaped calyx, somewhat grown to 

 the ovary at the base, petals 5, white or pink, 3-7-parted, stamens 10, styles 

 2-3 ; flowers in terminal racemes ; leaves mostly basal, palmately divided or 

 parted ; perennial. 



1. Calyx bell-shaped, free from the ovary L. tenella 



2. Calyx top-shaped, united to the lower half of the 



ovary L. pa rvi flora 



Mitella Linne 1753 Mitrewort 



(Gr. mitra, turban, from the form of the pod) 



PL -31, fig. 5. 



Sepals 5, united into a bell-shaped calyx, grown to the base of the 

 ovary, petals 5, white to greenish-yellow, cleft or pinnatifid, stamens 10 

 or 5, ovary 1-celled, styles 2, capsule 2-valved at the tip ; flowers in spike- 

 like racemes ; leaves mostly basal, simple ; perennial. 



1. Petals yellowish, 7-9-pinnatifid ; stigma 2-lobed ; 



stamens opposite the petals M. pentdndra 



2. Petals white, trifid to entire; stigma entire; sta- 



mens alternate with the petals M. trifida 



Parxassia Linne 1753 Parxassia 



(Named from Mount Parnassus) 



PL 31, fig. 8. 



Sepals 5, united into a short tube, free from or grown to the ovary, 



