LEPTARRHENA SAXIFR AG ACE^E. 189 



7. Bolaudra. Petals 5, linear, persistent: stamens 5, inserted in the 

 throat of the calyx : carpels 2, united at base free from but included 

 in the inflated calyx. 



8. Hemieya. Petals persistent : stamens 5, inserted on the throat of 

 the calyx : carpels united and wholly adnate to the tube of the calyx : 

 leaves not peltate 



* * Ovary 1-celled, with 2-3 parietal or basal placentae alternate 

 with the styles or stigmas ; filaments all antheriterous. 



9. Leptaxis. Petals 4, filiform, entire, persistent: stamens 2-3, in- 

 serted in the throat of the calyx : capsule 2-valved. attenuate below 

 to a stipe, free from the calyx. 



10. Tellima. Petals 5, deciduous, pectinately lobed or parted : stamens 

 9 or 10, short, inserted in the throat of the calyx: capsule 2-valved, 

 sessile, adnate to the base of the inflated calyx. 



11. Litliopkragma. Petals 5, deciduous, unguiculate, palmately lobed 

 or entire : stamens 5 or 10, inserted in te throat of the calyx: cap- 

 sule mostly 3-valved, free or adnate to the base of the calyx. 



12. Mitella. Petals 5, deciduous, pinnately lobed or parted : stamens 5 

 or 10, very short, inserted in the throat of the calyx : capsule 2- 

 valved, depressed, adnate to the base of the calyx: inflorescence 

 racemose. 



13. Mitellastra. Stamens 5, included connivent: petals 5, deciduous, 

 styles 2, recurved : inflorescence cymose. 



14. Tiarella. Petals 5, entire: stamens 10, inserted at the base of the 

 calyx : capsule very unequally 2-valved, free from the calyx. 



15. Heuehera. Petals 5, entire, deciduous : stamens 5, inserted in the 

 throat of the calyx : capsule equally 2-valved, the lower half adnate to 

 the calyx. 



16. Chrysospleniuin. Petals always wanting: stamens 8-10. short, 

 inserted in the throat of the calyx : capsule short, equally 2-valved, 

 the lower half adnate to the calyx. 



* * * Ovary 1-celled, with 3-4 parietal placentae directly under 

 as many obtuse sessile stigmas : stamens 5, alternating with as many 

 clusters of united sterile filaments. 



17. Parnassia. Petals 5, large: calyx 5-parted, free from the ovary: 

 flowers solitary. 



1 LEPTARRHENA R. Brown, Parry's lstvoy. Suppl. 273. 

 Herbs with coriaceous persistent leaves crowded at the base of 

 the nearly naked stems and rather numerous flowers in bracted 

 paniculate racemes. Calyx campanulate, 5-parted, the base 

 adherent to the ovary. Petals 5, entire. Stamens 10, inserted 

 into the tube of the calyx : filaments subulate : anthers 1-celled, 

 2-valved. Ovary of two nearly distinct carpels, tapering into 

 very short styles. Seeds numerous, ascending, scobiform ; the 

 testa loose, elongated and subulate at both ends, including the 

 oval nucleus. 



L. pyrolifolia Ser. DC. Prodr. iv, 4S. Scape-like stems 8-16 inches 

 high, rigid, a little pubescent or glandular toward the summit, and 1-2 

 snudl leaves with sheathing petioles near the base; radical leaves obovate 

 to oblong or spatulate, 1-ti inches long, coriaceous, glabrous both sides, 

 coarsely serrate above the middle, attenuate below to a short winged 



