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 Michaüxii (Britton) Small. Foliage glandular-villous. Leaf-blades 
oblanceolate 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 4 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. TIARÉLLA 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 MiTREWORT. 
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. 
Leaf-blades 15-20 em. 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 cordifdlia 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 : hypanthium 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 shortclaws : 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 acne 
lobed again and coarsely toothed, the terminal lobe not longer than the others; petio - 
glabrous, longer than the blades: scapes erect, 2-4 dm. tall: raceme 1.5-3 dm. long ue z 
icels 5-10 mm. long, solitary or several together, subtended by linear bracts : hypant qy 
minutely glandular-pilose : sepals oblong or oblong-ovate, 2 mm. long, obtuse : petals w h b. 
2.5 mm. long; blades lanceolate, acuminate, narrowed into short claws : filaments : u 
shaped : capsules short-beaked, the larger valve 8-10 mm. long: seeds about 1 mm. ong. 
In woods, in or near the mountains, North Carolina. Spring. 
6. LEPUROPÉTALON Ell. 
Diminutive annual caulescent herbs. Leaves alternate: blades broadened upward, 
entire. Flowers perfect, solitary and terminal. Sepals 5. Petals 5, white, gc. 
broadened upward. Stamens 5: filaments very short. Carpels 3, united. onc : 
with 3 parietal placentae: styles 3. Ovules numerous. Capsule 1-celled, opening PY 
valves at the apex. Seeds numerous. 
1. Lepuropetalon spathulàtum (Muhl.) Ell. Glabrous, 0.5-1.5 cm. tall. puce 
angled, branching from the base, the branches tufted : leaf-blades spatulate, 2-6 pnr 5 
obtuse, entire, sessile: flowers terminal, solitary, 1.5-2 mm. broad : sepals abes eo i 
persistent: petals spatulate, longer than the sepals: filaments much shorter than 
sepals : anthers yellow : seeds numerous, oval, 0.3 mm. long, punctate. 
In clay soil, South Carolina and Georgia. Spring. 
