502 SAXIFRAGACEAE 



maturity. Corolla irregular : petals 5, various, 2 narrow, tapering into slender claws, 3 

 with short claws and sagittate or lanceolate blades. Stamens 10 : filaments filiform : 

 anthers small. Carpels 2, partially united : styles diverging at maturity. Ovules numer- 

 ous. Follicles rather plump, with diverging tips. Seeds with longitudinal striations. 



1. Spatularia Michauxii (Britton) Small. Foliage glandular-villous. Leaf -blades 

 pblanceolate or oblong-spatulate, 3-30 cm. long, coarsely dentate-serrate, each narrowed 

 into a winged petiole-like base as long as the blade or commonly shorter : scapes erect, 

 2-9 dm. tall, usually flexuous, paniculately branched above : flowers irregular, white, 7-9 

 mm. broad : sepals oblong, rather acute, reflexed : petals various, 2 spatulate, 1-nerved, 

 with long slender claws, 3 lanceolate or sagittate, 3-nerved, bimaculate, all thrice longer 

 than the sepals : filaments filiform : follicles 5-6 mm. long, united for about ^ their length, 

 the tips widely diverging : seeds oblong, 1 mm. long, with longitudinal papillose ridges. 

 [Saxifraga leucanthemifolia Michx., not Le Peyr.] 



On cliffs and steep banks in the mountains, Virginia to Georgia and Tennessee. Summer. 



5. TIARELLA L. 



Perennial scapose herbs, with horizontal rootstocks. Leaves chiefly basal : blades 

 simple or 3-foliolate, long-petioled : petioles with small adnate stipules. Flowers perfect, in 

 simple or branched terminal racemes. Sepals 5, persistent. Petals 5, entire, white. 

 Stamens 10 : filaments elongated. Ovary 1 -celled, flattened, 2-lobed at the apex, partly 

 inferior : styles 2. Ovules numerous, borne on basal placentae. Capsules flattened, 1- 

 celled, opening by 2 unequal valves between the styles. Seeds numerous, at the base of the 

 capsule, smooth. FALSE MITBEWOET. 



Leaf-blades 3-6 cm. in diameter, the terminal lobes longer than the others : sepals 



2.5 mm. long : petals with elliptic blades : capsules 7-8 mm. long. 1. T. cordifolia. 



JLeaf-blades 15-20 cm. in diameter.the terminal lobes not longer than the others: sepals 



2 mm. long : petals with lanceolate blades : capsules 8-10 mm. long. 2. T. macrophylla. 



1. Tiarella cordif61ia L. Leaf-blades 3-6 cm. broad, ovate to suborbicular in out- 

 line, 3-5-lobed, sparingly pubescent on both sides, cordate, the lobes becoming rounded, 

 crenate with mucronulate teeth, the terminal one much larger than the others ; petioles erect 

 or nearly so, retrorsely pubescent, much longer than the blades : scapes erect, solitary 

 or tufted, 1-3 dm. tall : raceme 3-20 cm. long : pedicels 5-10 mm. long, subtended by 

 minute bracts : hypanihium minutely glandular-pilose : sepals oblong-spatulate to obovate, 

 2.5 cm. long, obtuse : petals 3 mm. long : blades narrowly elliptic, acuminate at the apex, 

 narrowed into short claws : filaments club-shaped : capsule slender-beaked, the valves striate, 

 the larger one 7-8 mm. long : seeds 1-1.3 mm. long. 



In woods, Nova Scotia to Minnesota and Indiana, and along the mountains to Georgia and Ala- 

 bama. Spring. 



2. Tiarella macrophylla Small. Leaf-blades 15-20 cm. broad, 5-lobed, glabrous, 

 except a few hairs on the nerves beneath, deeply cordate, the lobes acute or acuminate, 

 lobed again and coarsely toothed, the terminal lobe not longer than the others ; petioles 

 glabrous, longer than the blades : scapes erect, 2-4 dm. tall : raceme 1.5-3 dm. long : ped- 

 icels 5-10 mm. long, solitary or several together, subtended by linear bracts : hypanthium 

 minutely glandular-pilose : sepals oblong or oblong-ovate, 2 mm. long, obtuse : petals white, 

 2.5 mm. long ; blades lanceolate, acuminate, narrowed into short claws : filaments club- 

 shaped : capsules short-beaked, the larger valve 8-10 mm. long : seeds about 1 mm. long. 



In woods, in or near the mountains, North Carolina. Spring. 



6. LEFUROPETALON Ell. 



Diminutive annual caulescent herbs. Leaves alternate : blades broadened upward, 

 entire. Flowers perfect, solitary and terminal. Sepals 5. Petals 5, white, minute, 

 broadened upward. Stamens 5 : filaments very short. Carpels 3, united. Ovary 1-celled, 

 with 3 parietal placentae : styles 3. Ovules numerous. Capsule 1-celled, opening by 3 

 valves at the apex. Seeds numerous. 



1. Lepuropetalon spathulatum (Muhl.) Ell. Glabrous, 0.5-1.5 cm. tall. Stems 

 angled, branching from the base, the branches tufted : leaf-blades spatulate, 2-6 mm. long, 

 obtuse, entire, sessile: flowers terminal, solitary, 1.5-2 mm. broad: sepals ovate, obtuse, 

 persistent : petals spatulate, longer than the sepals : filaments much shorter than the 

 sepals : anthers yellow : seeds numerous, oval, 0.3 mm. long, punctate. 



In clay soil, South Carolina and Georgia. Spring. 



